text:
|Publication number
|Publication type
|Application number
|Publication date
|5 Feb 2008
|Filing date
|2 Feb 2006
|Priority date
|2 Feb 2005
|Fee status
|Also published as
|Publication number
|Ira S. Faberman, Stewart C. Koch, Charles Y. Lafontaine, Dave E. Williams, Harold C. Scott
|Original Assignee
|Magnetic Applications, Inc.
|Export Citation
|BiBTeX, EndNote, RefMan
|Patent Citations (30), Referenced by (38), Classifications (22), Legal Events (5)
|External Links: USPTO, USPTO Assignment, Espacenet
This application claims the benefit of U.S. Provisional Application No. 60/649,720, filed Feb. 2, 2005.
The present invention relates to voltage and current control systems for machines for converting between mechanical and electrical energy, such as brushless AC generators, and in particular to a control system for a compact permanent magnet high power alternator, such as a compact permanent magnet high power alternator suitable for automotive use.
An alternator typically comprises a rotor mounted on a rotating shaft and disposed concentrically relative to a stationary stator. The rotor is typically disposed within the stator. However, the stator may be alternatively positioned concentrically within the rotor. An external energy source, such as a motor or turbine, commonly drives the rotating element, directly or through an intermediate system such as a pulley belt. Both the stator and the rotor have a series of poles. Either the rotor or the stator generates a magnetic field, which interacts with windings on the poles of the other structure. As the magnetic field intercepts the windings, an electric field is generated, which is provided to a suitable load. The induced electric field (which is commonly known as a voltage source) is typically applied to a rectifier, sometimes regulated, and provided as a DC output power source. The induced current is typically applied to a rectifier, sometimes regulated, and provided as a DC output power source. In some instances, a regulated DC output signal is applied to a DC to AC inverter to provide an AC output.
Conventionally, alternators employed in motor vehicle applications typically comprise: a housing, mounted on the exterior of an engine; a stator having 3-phase windings housed in the housing, a belt-driven claw-pole type (e.g. Lundell) rotor rotatably supported in the housing within the stator. However, to increase power output the size of the conventional alternator must be significantly increased. Accordingly, space constraints in vehicles tend to make such alternators difficult to use in high output, e.g. 5 KW, applications, such as for powering air conditioning, refrigeration, or communications apparatus.
In addition, the claw-pole type rotors, carrying windings, are relatively heavy (often comprising as much as three quarters of the total weight of the alternator) and create substantial inertia. Such inertia, in effect, presents a load on the engine each time the engine is accelerated. This tends to decrease the efficiency of the engine, causing additional fuel consumption. In addition, such inertia can be problematical in applications such as electrical or hybrid vehicles. Hybrid vehicles utilize a gasoline engine to propel the vehicle at speeds above a predetermined threshold, e.g. 30 Kph (typically corresponding to a range of RPM where the gasoline engine is most efficient). Similarly, in a so-called "mild hybrid," a starter-generator is employed to provide an initial burst of propulsion when the driver depresses the accelerator pedal, facilitating shutting off the vehicle engine when the vehicle is stopped in traffic to save fuel and cut down on emissions. Such mild hybrid systems typically contemplate use of a high-voltage (e.g. 42 volts) electrical system. The alternator in such systems must be capable of recharging the battery to sufficient levels to drive the starter-generator to provide the initial burst of propulsion between successive stops, particularly in stop and go traffic. Thus, a relatively high power, low inertia alternator is needed.
In general, there is in need for additional electrical power for powering control and drive systems, air conditioning and appliances in vehicles. This is particularly true of vehicles for recreational, industrial transport applications such as refrigeration, construction applications, and military applications.
For example, there is a trend in the motor vehicle industry to employ intelligent electrical, rather than mechanical or hydraulic control and drive systems to decrease the power load on the vehicle engine and increased fuel economy. Such systems may be employed, for example, in connection with steering servos (which typically are active only a steering correction is required), shock absorbers (using feedback to adjust the stiffness of the shock absorbers to road and speed conditions), and air conditioning (operating the compressor at the minimum speed required to maintain constant temperature). The use of such electrical control and drive systems tends to increase the demand on the electrical power system of the vehicle.
Similarly, it is desirable that mobile refrigeration systems be electrically driven. For example, driving the refrigeration system at variable speeds (independently of the vehicle engine rpm) can increase efficiency. In addition, with electrically driven systems the hoses connecting the various components, e.g. the compressor (on the engine), condenser (disposed to be exposed to air), and evaporation unit (located in the cold compartment), can be replaced by an electrically driven hermetically sealed system analogous to a home refrigerator or air-conditioner. Accordingly, it is desirable that a vehicle electrical power system in such application be capable of providing the requisite power levels for an electrically driven unit.
There is also a particular need for a "remove and replace" high power alternator to retrofit existing vehicles. Typically only a limited amount of space is provided within the engine compartment of the vehicle to accommodate the alternator. Unless a replacement alternator fits within that available space, installation is, if possible, significantly complicated, typically requiring removal of major components such as radiators, bumpers, etc. and installation of extra brackets, belts and hardware. Accordingly, it is desirable that a replacement alternator fit within the original space provided, and interfaces with the original hardware.
In general, permanent magnet alternators are well known. Such alternators use permanent magnets to generate the requisite magnetic field. Permanent magnet generators tend to be much lighter and smaller than traditional wound field generators. Examples of permanent magnet alternators are described in U.S. Pat. No. 5,625,276 issued to Scott et al on Apr. 29, 1997; U.S. Pat. No. 5,705,917 issued to Scott et al on Jan. 6, 1998; U.S. Pat. No. 5,886,504 issued to Scott et al on Mar. 23, 1999; U.S. Pat. No. 5,92,611 issued to Scott et al on Jul. 27, 1999;U.S. Pat. No. 6,034,511 issued to Scott et al on Mar. 7, 2000; and U.S. Pat. No. 6,441,522 issued to Scott on Aug. 27, 2002.
Particularly light and compact permanent magnet alternators can be implemented by employing an "external" permanent magnet rotor and an "internal" stator. The rotor comprises a hollow cylindrical casing with high-energy permanent magnets disposed on the interior surface of the cylinder. The stator is disposed concentrically within the rotor casing, and suitably comprises a soft magnetic core, and conductive windings. The core is generally cylindrical width an axially crenellated outer peripheral surface with a predetermined number of equally spaced teeth and slots. The conductive windings (formed of a suitably insulated electrical conductor, such as varnished copper motor wire), are wound through a respective slot, outwardly along the side face of the core around a predetermined number of teeth, then back through another slot. The portion of the windings extending outside of the crenellation slots along the side faces of the core are referred to herein as end turns. Rotation of the rotor about the stator causes magnetic flux from the rotor magnets to interact with and induce current in the stator windings. An example of such an alternator is described in, for example, the aforementioned U.S. Pat. No. 5,705,917 issued to Scott et al on Jan. 6, 1998 and U.S. Pat. No. 5,92,611 issued to Scott et al on Jul. 27 1999.
The power supplied by a permanent magnet generator varies significantly according to the speed of the rotor. In many applications, changes in the rotor speed are common due to, for example, engine speed variations in an automobile, or changes in load characteristics. Accordingly, an electronic control system is typically employed. An example of a permanent magnet alternator and control system therefore is described in the aforementioned U.S. Pat. No. 5,625,276 issued to Scott et al on Apr. 29, 1997. Examples of other control systems are described in U.S. Pat. No. 6,018,200 issued to Anderson, et al. on Jan. 25, 2000. Other examples of control systems are described in commonly owned co-pending U.S. patent application Ser. No. 10/860,393 by Quazi et al, entitled "Controller For Permanent Magnet Alternator" and filed on Jun. 6, 2004. The aforementioned Quazi et al application is hereby incorporated by reference as if set forth verbatim herein.
The need to accommodate a wide range of rotor speeds is particularly acute in motor vehicle applications. For example, large diesel truck engines typically operate from 600 RPM at idle, to 2600 RPM at highway speeds, with occasional bursts to 3000 RPM, when the engine is used to retard the speed of the truck. Thus the alternator system is subject to a 5:1 variation in RPM. Light duty diesels operate over a somewhat wider range, e.g. from 600 to 4,000 RPM. Alternators used with gasoline vehicle engines typically must accommodate a still wider range of RPM, e.g. from 600 to 6500 RPM. In addition, the alternator must accommodate variations in load, i.e., no load to full load. Thus the output voltage of a permanent magnet alternator used with gasoline vehicle engines can be subject to a 12:1 variation. Accordingly, if a conventional permanent magnet alternator is required to provide operating voltage (e.g. 12 volts) while at idle with a given load, it will provide multiples of the operating voltage, e.g. ten (10) times that voltage, at full engine RPM with that load, e.g. 120 volts. Where the voltage at idle is 120 V, e.g. for electric drive air conditioning, or communications apparatus, the voltage at full engine RPM would be, e.g. 1200 volts. Such voltage levels are difficult and, indeed, dangerous to handle. In addition, such extreme variations in the voltage and current may require more expensive components; components rated for the high voltages and currents produced at high engine RPM (e.g. highway speeds) are considerably more expensive, than components rated for more moderate voltages.
Various attempts to accommodate the wide range of output voltages from permanent magnet alternators have been made. For example, the aforementioned Scott et al U.S. Pat. No. 5,625,276, describes a controller that selectively activates individual windings to achieve a desired output. The windings may be connected in a fully parallel configuration to provide high current at relatively low voltage levels, or in series to provide high voltage capacity. As drive RPM increases, individual windings are, in effect, disconnected from the operative circuit to control output voltage and/or current. However, particularly in compact high power, high speed ratio applications such as motor vehicles, the switching transitions between windings have deleterious effects, especially at the high end of the RPM range.
Other attempts have involved controlling the RPM of the alternator, and thus its voltage, independently of the engine RPM. An example of such an attempt is described in U.S. Pat. No. 4,695,776, issued Sep. 22, 1987 to Dishner. These solutions tend to involve mechanical components that are large, require maintenance and are subject to wear.
Other attempts have involved diverting a portion of the magnetic flux generated in the alternator to modulate output voltage. An example of a system is described in U.S. Pat. No. 4,885,493 issued to Gokhale on Dec. 5, 1989. Flux diversion, however, typically requires additional mechanical components and can be slow to react.
Rectification and regulation can be effected as a single process using a switching bridge (e.g. SCR bridge) with phase angle control of duty cycle. The bridge includes respective control switching devices (e.g. SCRs) that are selectively actuated to provide conduction paths between the input and output of the bridge. In essence, each half cycle (irrespective of polarity) of the AC signal produces a pulse of a predetermined polarity (typically positive) at the output of the bridge. The duration and timing of the conduction perhaps controls the output of the bridge. Such switching bridges may be "half controlled", comprising a respective controlled switching device (e.g. SCR) and diode for each phase, or "full controlled", comprising for each phase two switching devices (e.g. SCRs), one for each polarity.
Conventionally, the switching devices in the bridge are actuated in accordance with "phase angle control of duty cycle" to provide a predetermined voltage output level. Trigger signals to the switching devices are generated by a controller that detects zero crossings in the respective phases of the AC signal and generates the trigger signal accordingly (typically after a delay nominally corresponding to a predetermined phase angle in the AC signal, and, concomitantly with a desired DC output level). More particularly, in a conventional system, when a zero crossing is detected in a particular phase, the controller delays by a time period corresponding to the desired duty cycle (which, in turn, corresponds to the desired output voltage level). The delay is typically engendered by a one-shot or conventional timing circuit. For example, a capacitor is charged with current when the voltage across the capacitor exceeds a reference voltage, a trigger to the SCR associated with the phase is generated, and the capacitor discharged. In response to the trigger signal, the SCR turns on (is rendered conductive) and remains on until the current through it goes to zero, at which point it is rendered nonconductive until the next trigger signal. The cycle repeated in response to the next zero crossing of the appropriate polarity.
In a half controlled system, phase angle control of the output duty cycle is effected by selective actuation of the controlled switching devices during their associated half cycle of the AC signal; the diode segments of the legs are rendered conductive during the entire associated (opposite polarity) half cycle of the phase. The range of output signals that can be generated from a given AC signal level (and thus range of input AC signals) is thus limited, as compared to a full controlled system.
When full control is provided, the SCRs are each associated with a particular half cycle (polarity) of an associated phase. A trigger signal is generated in response to (e.g. after the phase delay) the zero crossing beginning the associated half cycle of the phase. Accordingly, provisions must be made to differentiate between positive going and negative going zero crossings.
When a switching bridge (e.g. SCR bridge) and phase angle control of duty cycle is used in conjunction with an AC power source that varies in magnitude and changes alternating frequency very rapidly (as in the case of an motor vehicle alternator) the variations in voltage output and ripple contents can be particularly significant. This is particularly true in full controlled systems. The variations in ripple contents in the output of the bridge can produce unacceptable output ripple harmonics and require extensive filtering. For example, the outputs of many alternators are not a uniform sinewave. Non-uniformities in amplitude and duration often occur between half cycles, and between phases of the AC input signal to the bridge, and are reflected in the outputs of the portions (legs) of the bridge circuitry associated with the respective phases. Such distortions and non-uniformities in the alternator output can occur for any of a number of reasons, such as, for example, variations in the placement of the winding turns relative to each other and, in the case of permanent magnet alternators, relative to the magnets. Further variations in the outputs of the portions (legs) of the bridge associated with the respective phases (due to, e.g. tolerances, temperature, etc) in component values between the circuitry associated with the various phases, cyclic change in frequency due to engine cylinder firing, variations in the magnetic air gap, variations of the saturation of the stator teeth as the magnet progresses etc.
In addition, the output of the generator often includes spurious components (e.g. spikes) that can be mistaken for zero crossings by the detector circuitry.
Thus, there is a need for a relatively inexpensive and efficient control system using relatively rugged semiconductors (such as SCRs) that can accommodate wide variations in the frequency and amplitude of an AC source (e.g. alternator), while minimizing output ripple harmonics and filtering requirements.
In some applications there may be relatively long lengths of electrical cable connecting the output of the converter to the load. For example, the cabling between the converter and battery (load) can be sufficient to cause a voltage drop between the converter and battery
There are also a number of other factors that can affect the operation of alternator systems in the. For example, the operation of alternator systems can be significantly affected, and sometimes disabled, by the temperature of the system components. There is a need for an alternator control including mechanisms for detecting temperatures harmful to the operation of the alternator system.
In alternator systems used to charge batteries, battery temperature has a direct impact on the optimal battery charging voltage and battery sulfation is a major contributor to shortened battery life. There is a need for alternator charging systems (particularly in motor vehicle applications) that can dynamically adjust output for optimized charging voltage and dynamically handle battery sulfation.
There is a need for an alternator charging system including a mechanism for intelligent control, (e.g. microprocessor), providing for example: monitoring electrical system performance; providing electrical system protection; and field adjustment of system operating parameters.
The stator of a conventional high current motor vehicle alternator is constructed with conductors of large cross sectional area effectively connected in series. Several problems can exist with this winding method. For example: because of the low number of turns (in some instances only a single turn) per pole phase coil, it is difficult or impossible to make a small change in design output voltage by changing the number of turns of the phase pole coil; the large cross sectional area of the conductors make the stator difficult to wind; and a short circuit between coils will typically burn out the entire stator and may stall the alternator, resulting in possible damage to the drive system or overloading the vehicle engine.
In general, permanent magnet alternators incorporating a predetermined number of independent groups of windings, wound through slots about predetermined numbers of teeth where the power provided by each group is relatively unaffected by the status of the other groups are known. For example, such an alternator is described, together with a controller therefor, in U.S. Pat. No. 5,900,722 issued to Scott et al. on May 4, 1999. In the alternator described in U.S. Pat. No. 5,900,722, the number of groups of windings was equal to an integer fraction of the number of poles, and the controller circuit selectively completed current paths to the individual groups of windings to achieve a desired output.
However, there remains a need for a compact high power alternator wherein a desired output voltage can be achieved by changing the number of terms of the phase pole coil, that is relatively easy to wind, and minimizes the consequence of short circuits, while at the same time facilitating cooling. There is also a need for a converter that can accommodate such an alternator.
In accordance with various aspects of the present invention, a relatively inexpensive, control system is provided that can accommodate the wide variations in the output of a generator, such as a permanent magnet alternator, while providing an output with relatively uniform phase ripple.
In accordance with one aspect of the present invention, the trigger signal to a switching device (e.g. SCR) is initiated in accordance with the time integral of the voltage (e.g. volt-seconds) of the corresponding AC phase half cycle. For example, the trigger signal is generated when a ramp signal representative of the volt-seconds in the associated AC signal phase reaches a predetermined level. In the preferred embodiment, the ramp is generated by charging a capacitor with a signal representative of the voltage from the alternator itself.
In accordance with another aspect of the present invention, the trigger signal to a switching device (e.g. SCR) is initiated only in response to zero crossings occurring within a predetermined window of time related to (e.g. tracking) the frequency of the AC signal.
In accordance with another aspect of the present invention, an automatic gain system is employed to compensate for component value differences between the respective channels.
In accordance with another aspect of the present invention the control can compensate for losses present in long cable runs between converter and battery or other similar loses. Compensation can be effected either by sensing voltage remotely from the converter, e.g. in the vicinity of the battery, or locally within the converter.
In accordance with another aspect of the present invention a battery charging voltage can be optimized with respect to battery temperature.
In accordance with another aspect of the present invention a mechanism is provided to reduce battery plate sulfation.
In accordance with other aspects of the present invention mechanisms are provided to monitor various system parameters and to optimize various system parameters in the field.
In accordance with another aspect of the present invention various system protection methods have been implemented.
In accordance with another aspect of the present invention the stator winding is wound with a predetermined number of pole phase coils, preferably equal to the number of magnetic poles. Each pole phase coil is wound with enough turns to generate the required output voltage of the alternator and a fraction of the output current equal to 1 divided by the number of magnetic poles. These individual pole phase coils are then connected in parallel.
In accordance with another aspect of the present invention, a respective conducting phase ring corresponding to each output phase is installed within the alternator with each coil corresponding to the associated phase electrically connected to the conducting phase rings to facilitate cooling and grouping and transmission of output phases to the control
In accordance with another aspect of the present invention the conducting phase rings are held in place by a non-conducting support structure.
In accordance with another aspect of the present invention the conducting phase rings are disposed to provide an efficient cooling by exposure to the cooling fluids e.g. air, passing over the conducting phase rings.
The present invention will hereinafter be described in conjunction with the figures of the appended drawing, wherein like designations denote like elements (unless otherwise specified).
Referring now to
In general, alternator 102 generates AC power in response to mechanical input from energy source 104. Alternator 102 preferably provides multi-phase (e.g. three-phase, six-phase, etc.) AC output signals, e.g. phase A (118), phase B (120), and phase C (122). Those output signals are typically unregulated and may vary significantly in accordance with drive RPM (source 104).
The AC phase signals from alternator 102 are applied to system 100, preferably through input fuses 128. System 100 rectifies the AC signal from alternator 102, i.e. converts it into a DC signal and regulates the voltage of that signal at a predetermined level, e.g. 28V. Switching bridge 112 selectively, in response to control signals from controller 110, provides conduction paths between the various phases of the AC signal from alternator 102 and a load 106. Exemplary switching bridges 112 are shown in
The regulated DC signal Voltage Regulated Output (VRO) is then applied, suitably through an output fuse 136, to load 106 and energy storage device 108. Load 106 may be any device that uses power, such as, e.g. lights, motors, heaters, electrical equipment, power converters, e.g. inverters or DC-to-DC converters. Energy storage device 108 filters or smoothes the output of control system 110 (although, in various embodiments, controller 110 may itself incorporate or otherwise provide adequate filtering).
Additionally, as will be more fully explained later, other outputs, 150, and 160, are also provided. Also crowbar circuit 142 is provided for system protection.
Alternator 102 may be any suitable device that generates AC power in response to mechanical input, such as a brushless AC generator or a permanent magnet alternator, and preferably an alternator of the type described in commonly owned co-pending U.S. patent application Ser. No. 10/889,980 by Charles Y. Lafontaine and Harold C. Scott, entitled "Compact High Power Alternator" and filed on Jul. 12, 2004. The aforementioned Lafontaine et al application is hereby incorporated by reference as if set forth verbatim herein. As will be further described, in the preferred embodiment, alternator 102 is of the compact high power alternator type, but includes for each pole, a respective group of windings (including at least one winding corresponding to each phase) with all of the windings corresponding to a given phase connected in parallel. Preferably, the parallel connection between coils corresponding to the same phase is effective through a corresponding conducting phase ring 138, and includes fusible links 124, disposed between the conducting phase rings 138, and the output terminals 126 of the alternator. Conducting phase rings are a means to efficiently collect the output of each individual coil to its respective conducting phase ring, which is in turn attached to its respective output terminal. As the total number of poles increases so too do the number of individual coils. The conventional method of gathering coils involves soldering the motor wire to conventionally insulated motor lead wire. As the rated output of the alternator increases, a corresponding increase in the load carrying capacity of the motor lead wire is also required. The only means available to meet the increasing load demand on the lead motor wire is to increase the cumulative gauge of the wire by increasing the gauge of a single wire or by using multiple wires in parallel. The net effect is increasingly larger and larger cross sectional areas of motor lead wire. When considering the total number of coils and their respective end turns along with the lead wire and its associated insulation, the resulting stator assembly with conductor and motor lead wire tied together insulate the end turns, detrimental to cooling. The resulting assembly also restricts the only available airflow over the end turns further reducing cooling. A preferred embodiment of alternator 102 will be described in conjunction with
Briefly, alternator 102 suitably comprises a rotor mounted on a rotating shaft and disposed concentrically relative to a stationary stator. The stator suitably includes respective phase windings, A, B and C connected together at one end (neutral), in a star configuration. In operation, the rotator is driven by external energy source 104, either directly or through an intermediate system such as a pulley belt. In motor vehicle applications, alternator 102 is typically mounted under hood, and belt driven from the vehicle engine. Relative motion between rotor and stator causes voltage to be induced in the windings. Alternator 102 is preferably designed such that it generates a predetermined minimum voltage at idle or a minimum RPM under full load conditions. As noted above, in motor vehicle applications, drive RPM can vary widely, e.g. from 600 RPM at idle, to 3000 RPM for large diesel trucks 600 to 4,000 RPM for light duty diesels, and from 600 to 6500 RPM gasoline vehicle engines. In addition, the alternator must accommodate variations in load, i.e., no load to full load. Thus the output voltage of a permanent magnet alternator 102 when used with a gasoline vehicle engine can be subject to a 12:1 variation. Accordingly, if a conventional permanent magnet alternator is required to provide operating voltage (e.g. 18 volts) while at idle speeds with a given load, it will provide multiples of the operating voltage, e.g. twelve (12) times that voltage, at full engine RPM with that load, e.g. 216 volts.
Referring now to
Referring to
Controller 110 suitably further comprises: circuitry, e.g. error amplifier 226 and variable reference voltage generator 228, for generating a reference signal indicative of the desired firing angle to trigger generators 210 (e.g. 210A, 210B, 210C) against which the output of the associated variable ramp generator 208 (e.g. 208A, 208B, 208C) is compared; a conventional microprocessor or microcontroller 248 (e.g. a PIC18F242) for, in cooperation with various other elements of system 100, generating signals indicative of, or to react to, various operating conditions, (e.g. controlling various fans in response to system temperatures, limiting current or shutting the system down due to over-temperature conditions, shutting the system down due to over or under voltage conditions, etc.); an opto enable circuit 250, to selectively enable and inhibit application of trigger signals to switching bridge 112; a No-Fire circuit 252 for generating signals indicative of certain designated conditions during which application of the trigger signals to switching bridge 112 are inhibited; a system start circuit 254 for inhibiting operation in the absence of signals from all phases; a suitable logic power supply 256; and an over voltage detect circuit 258.
Referring now to
As previously noted, zero-crossing detectors 206 suitably each comprise a filtered comparator 212, a variable blanker 214, and a reset pulse generator 216. Filtered comparator 212 determines when the voltage is above or below a reference point, e.g. 0 volts to 3.5 volts, preferably 2.5 volts. The changeover point is deemed to be a potential zero crossing. Indicia of the polarity of the signal are provided to the associated trigger generator 210. Variable Blanker 214 provides a blanking pulse equal to a predetermined portion, e.g. between 30% and 70% and preferably 50%, of the zero crossing-to-zero crossing period so that spurious zero cross signals that might be caused by noise following the actual zero crossing, do not trigger the reset pulse generator 216. Variable ramp generators 208 each generate a ramp with a shape characteristic representing the volt-seconds appearing at the secondaries (232A, 232B, 232C) of the associated transformer. The ramp is compared to a ramp reference voltage (RAMP_REF), from error amplifier 226. Coincidence at comparator 218 asserts a signal to digital routing circuit 220 which generates a trigger signal that turns on the appropriate switching device in bridge 112. The ramp is reset by the associated reset pulse generator 216.
More specifically, each of phase isolation transformers 204 (e.g. transformers 204A, 204B, 204C) suitably include a primary winding and multiple (e.g. 3) secondary windings, (230, 232 and 234) and generate several isolated, scaled, voltage waveforms which embody the characteristics of the associated phase voltage at its respective primary winding. The primary winding is driven by the alternator phases A (118)-B (120), B (120)-C (122), or C (122)-A (118). The secondary windings provide signals to the associated zero crossing detector 206 and ramp generator 208 and to system start circuit 254. Phase isolation transformers 204 are suitably commercial transformers capable of providing sufficient isolation for the particular application, such as, in the preferred embodiment, Tamura 3FS-248 transformers.
A signal indicative of the waveform of the associated phase from one of the secondary windings (e.g. A (230A), B (230B), or C(230C)) of each transformer 204 is applied to the associated zero-crossing detector 206 (e.g. 206A, 206B, and 206C). The zero-crossing detector 206 detects the occurrence and polarity of voltage zero crossings in the signal and generates waveform polarity information and ramp reset signals. The output signals of each zero-crossing detector 206 (e.g. 206A, 206B, and 206C) is provided to the associated variable ramp generator 208 (e.g. 208A, 208B, and 208C) and trigger generator 210 (e.g. 210A, 210B, and 210C). The outputs of the trigger generators, if enabled by the optocoupler enable circuit 250, are applied to fire the SCRs. The optocoupler enable circuit will not enable the trigger generator if the INHIBIT signal is asserted by either the microcontroller 248 or No-Fire circuit 252.
As previously noted, zero-crossing detectors 206 suitably each comprise a filtered comparator 212, a variable blanker 214, and a reset pulse generator 216. Referring now to
Variable blanker 214 (in cooperation with trigger generator 210) effectively prevents spurious transitions in the comparator output that might otherwise cause an SCR trigger signal to be generated from doing so. Transitions occurring within a predetermined portion of the comparator half cycle (e.g. within a predetermined number of phase degrees after a zero-crossing) are prevented from generating an SCR trigger signal. Still referring to
In the preferred embodiment, the duration of the one shot output pulse is controlled by the time required to charge a timing capacitor (e.g. 318). The timing capacitor is typically discharged when one shot 312 is triggered, and the output of one shot 312 is maintained at a predetermined level (e.g. the Q output of one shot 312 is held high) until capacitor 318 recharges to a predetermined level (at which point the Q output goes low). In conventional applications, a timing capacitor is typically charged through a resistor, and the duration of the one shot output pulse is constant. In the preferred embodiment of the present invention, however, the timing capacitor is charged through current source 316 driven by a signal proportional to the duty cycle of the one shot output (and hence the frequency of the comparator output) so that a time required to charge the timing capacitor is inversely proportional to the duty cycle of the one shot output. More specifically, the inverted output (Q bar of one shot 312) is applied to filter 314 which generates a DC signal proportional to the duty cycle of the one shot output to current source 316. Thus if the duty cycle (percentage of the comparator output half cycle) of Q output pulse decreases, the current provided to the timing capacitor will decrease. With decreased charging current, more time is required to charge the capacitor to the predetermined level, and thus increasing the duration of the one shot output pulse. Conversely, if the duty cycle of the one shot output signal increases, the current to the timing capacitor is increased, hastening the charge of the timing capacitor. The values of the components of filter 314 are chosen such that the duty cycle of the one shot output is equal to the predetermined value at a given comparator output frequency. The net result is that the duty cycle of the one shot output signal will self adjust to the predetermined value regardless of the rate of trigger inputs. The output of one shot 312 is provided to reset pulse generator 216, and, at connection point 302, for application to the associated trigger generator 210.
Reset pulse generator 216, in response to transitions of a predetermined polarity (e.g. rising edge), generates a short uniform duration pulse suitable for application to a switching element (e.g. a transistor 414,
Variable ramp generators 208 (e.g. 208A, 208B, 208C) generate a voltage ramp indicative of the time integral of the associated phase voltage (volt-seconds). The ramp is reset at phase zero crossings. More particularly, variable ramp generators 208 each generate a volt/second ramp in response to signal from a second secondary winding (e.g. 232A) of the associated isolation transformer 204. Ramp generators 208 are reset (and begin a new ramp) upon zero crossings in the associated phase, as indicated by a reset signal from the associated zero-crossing detector 206 (reset pulse generator 216). The instantaneous output voltage of ramp generator 208 is thus indicative of the volt seconds of the associated phase half cycle. Variable ramp generators 208 provide the volt/second ramp to the associated trigger generator 210 (210A, 210B, 210C). As will be further discussed, the associated trigger generator 210, compares the ramp voltage to a reference voltage, and, unless disabled by optocoupler enable circuit 250, generates a SCR trigger signal accordingly (e.g. when the ramp voltage is equal to the reference voltage).
In the case of the channel associated with designated reference phase (e.g. phase A), the ramp is also applied through buffer amplifier 224 to the respective AGC Amps 222 (222B, 222C) associated with the other channels. As will be more fully discussed, to facilitate automatic gain control certain components (e.g. resistors 410,
Referring to
Generating the ramp as a function of the voltage of the alternator itself (e.g. the volt seconds of the waveform) accommodates a wide range of alternator RPM. The time integral of the voltage (volt seconds) generated by a given winding of the alternator during a half cycle is constant at any RPM. As alternator RPM (and hence frequency of the signals provided by transformer 204) increases, the period the half cycle decreases, but the voltage of the signal increases such that volt-seconds of the half cycle remain constant. Thus the ramp is the same peak value (total volt seconds) for each half cycle at any rpm.
Ramp generators 208 preferably, also include a compensating filter 416, corresponding to pre-filter 308 in filtered comparator 212. Pre-filter 308 is preferably, as previously mentioned, employed in filtered comparator 212 to eliminate spurious high frequency transients in the output of the associated phase isolation transformer 204. Pre-filter 308 tends to interject a phase shift into the signal from which the zero crossings, (and reset pulse) are generated. It is desirable that reasonable fidelity be maintained between the generation of the ramp (e.g. ramp interval) and the reset pulses. Accordingly, filter 416 is provided to generate an analogous phase shift in the signal from which the ramp is derived.
Referring again to
AGC Amps 222B, and 222C compare the average voltage from the ramp generator 208 associated with the designated reference phase (e.g. 208A) with the average voltage from the associated ramp generator (e.g. 208B or 208C) and adjust the gain of the associated ramp generator (208B or 208C) so that the output ramp amplitude matches that of 208A. An exemplary AGC Amp 218 suitable for use in association with the designated reference phase (e.g. ramp generators 208B, 208C) is illustrated in
As previously noted, variations in the outputs of the portions (legs) of the bridge associated with the respective phases tend to occur due to variations in component values between the circuitry associated with the various phases, due to e.g. tolerances, temperature differences, winding voltage variation etc. The use of AGC amplifiers 222 provides compensation for such differences. With reference to
As previously noted, trigger generators 210 (e.g. 210A, 210B, 210C) generate a trigger signal to the appropriate SCR when the volt-second ramp indicative of the associated phase coincides with a control voltage indicative of the desired firing angle. The control signal can be fixed (constant), or variable, as in, for example, a feedback loop tending to maintain a predetermined regulated output voltage. In the preferred embodiment, the reference signal is established as part of a control loop. By comparing a fraction of the output voltage with the reference voltage from variable reference voltage 228, error amplifier 222 provides a control voltage which ultimately varies the SCR trigger latency and thus adjusts the output voltage.
Referring to
Variable reference voltage source 228 provides the reference voltage. The reference voltage can be fixed (constant) or, as in the preferred embodiment, dynamically modulated in accordance with an environmental parameter. For example, in applications where relatively long lengths of electrical cable connecting the output of the converter to the load can be sufficient to cause a significant voltage drop, the reference voltage can be modulated to account for such voltage drop. As current to the load increases (and the cabling voltage drop increases), the voltage regulation point is adjusted upward to maintain the desired regulated voltage at the load.
In certain applications suitable cabling may be installed between the desired regulation point, (e.g. battery terminals) and the remote sense input (140). However, in other applications (particularly retrofit applications) installation of suitable voltage sense cabling may not be practical. To accommodate such adjustments in applications were remote sense is impractical, a current sensor (e.g. hall effect device, shunt or similar device) 116, and variable reference voltage source 228 comprising parallel potentiometers VR1 and VR2 are employed. Potentiometers VR1 and VR2 are initially adjusted in a no load (zero current) condition to provide a reference voltage indicative of the desired output voltage (e.g. the wiper of potentiometer VR1 is set to produce the desired reference voltage with potentiometer VR2 wiper set to ground). The system load is then increased and VR2 is adjusted to bring the voltage at the load (or battery) back to the desired nominal voltage. Thereafter, in operation, the current feedback signal from sensor 116 applied to potentiometer VR2 effectively modulates the reference voltage to compensate for resistive drops in the cable so that the voltage across load 106 is substantially constant irrespective of current flow and voltage drop in the cable. Alternatively, remote sense input 140 may be utilized to ensure the voltage at a regulation sense point (e.g. battery or sensitive load applications) is maintained, negating inherent system loses e.g. long cable lengths. In order to utilize remote sense, suitable cabling should be installed to make connections between the regulation point (e.g. battery terminals) and the remote sense input (140). Due to the resistance at the input of local sense 114, the remote sense signal applied at input 140 will automatically override the local sense input at 114. When using remote sense, the wiper of potentiometer VR2 is set to ground. Thereafter, the system will regulate the VRO to maintain the desired voltage at the sense point (e.g. battery terminals) regardless of any losses between the output and the sense point.
It is desirable to adjust the voltage output setpoint (VRO), to accommodate changes in battery temperature. As shown in
It is further desirable to periodically raise the system charging voltage, VRO in order to desulfate the battery plates. To accomplish this, microcontroller 248 periodically asserts a signal (provided at nominal connection point 610) to reference amplifier 604, resulting in RAMP_REF being lowered, thereby raising the desired output voltage (VRO).
It is desirable to protect the system circuitry from over current conditions to prevent system component failure. Again referring to
In non-12 volt systems, (e.g. a 24 volt system) it may be desirable to provide a source of 12 volt power for auxiliary systems. In some 24 volt automotive applications the alternator provides a 12 volt signal which controls an alternator warning indicator typically by powering a relay connected to a warning lamp. Accordingly, referring briefly to
In some applications, it may be desirable to provide 12 volt power sufficient to operate 12 volt subsystems within system 100, in lieu of or in addition to the circuit of
Neither, either, or both of sources 150 and 160 may be included in system 100 as application requirements dictate or may be replaced by a source of a different voltage.
It is desirable to provide various failsafe systems to prevent potential damage to components in anomalous operating conditions. As shown in
An exemplary No-Fire circuit 252 is shown in
An exemplary over voltage detect circuit 258 is shown in
In the preferred embodiment, system start circuit 254 prevents system operation in situations where all phases of the AC input from alternator 102 are not present. Referring to
To protect against over current conditions (e.g. electrical short) fusible links 124, are provided in the phase wiring of alternator 102, input fuses 128 and output fuse 136 are provided in control system 100. (e.g. 350 amp fusible links, 350 amp input phase fuses and 400 amp output fuse for a 350 amp system). In addition, to protect electrical system components from over voltage conditions, a shorting crowbar circuit 142 (
Other sensor circuitry providing signals indicative of other operating parameters may also be provided to generate inputs to microcontroller 248 as parameters relevant to generation of the INHIBIT signal. For example, referring to
A flowchart of the program executed by microcontroller 248 is provided in FIGS. 12A-12AG. In general, the program is composed of interrupt initiated and time sequenced threads and routines, as follows:
ISR_ExtInt_1: Over-Voltage
This interrupt is the response to detection of an over-voltage condition by over voltage detect circuit 258 (
ISR_ExtInt_0: Zero-Cross
This interrupt is the response to a zero-cross of the alternator phase input going through zero volts. A signal indicative of the zero-cross is suitably applied to the microcontroller, (ZC_SIG,
ISR_Timer_0: Zero-Cross Timer Roll-Over
This interrupt is the response to an internal counter, Timer_0, incremented in accordance with an internal clock and reset upon zero crossings (the zero-cross counter) rolling over. This is an error condition indicating that the speed of the engine is too low.
ISR_Timer_2: Time-Base
This interrupt is the response to the general system delay. It is a repetitive event that maintains delays within the firmware.
Threads and Routines
This thread is responsible for buffering each zero-cross period. Each time a new period is read, a flag indicating whether the new value is valid is tested, if set, store a "full-count". The value is stored in the buffer and the average is calculated. A flag is set for the other threads to indicate that the average has been updated.
This thread is responsible for sampling all of the analog channels. Each channel is acquired through the on-chip Analog-to-Digital converter. The readings are stored in a buffer for each channel. The average of each buffer is calculated for use by other threads. A flag is set for the other threads to indicate that the averages have been updated.
This routine tests if the analog averages have been updated. If so, a series of bounds checking is performed for the output of switching bridge 112 (rail voltage, VRO), the heatsink temperature and the alternator temperature.
This routine tests a signal representative of the average rail voltage (VRO) (e.g. V_SENSE
This routine tests the average alternator temperature against a series of limits to declare one of the following conditions: normal, current limit level 1 (e.g. FOLD_30), current limit level 2 (e.g. FOLD_60), and system inhibit.
This routine tests the average heatsink temperature against a series of limits to declare one of the following conditions: normal, current limit level 1 (e.g. FOLD_30), current limit level 2 (e.g. FOLD_60) and system inhibit.
This routine tests the average period of the alternator (as determined by the period between successive zero crossings) against a series of limits to declare one of the following conditions: too low, normal and too high.
This routine tests the elapsed time against the specified boost start and end times. The elevated charging voltage signal applied to nominal connection point 610, (for reducing sulfation in the battery) is controlled by this routine
This routine is responsible for controlling the output of the processor based on faults declared from the various tests. This routine is also in control of the fans for the heatsink and the alternator.
This routine is responsible for holding the system from running until all faults are cleared from the various tests.
Referring now to
A 3 wire connection to the (three-phase) alternator. Whether the windings are joined as a "Delta" or "Wye" as shown here, only 3 output wires are required for operation. Alternatively, in the "Wye" alternator configuration, neutral may be exported from the alternator depending upon application requirements (e.g. split supply operation).
Conduction to the output requires that 2 SCRs are in conduction. There are therefore conduction losses due to the voltage drop across 2 SCRs.
Because of the rolling nature (120 degrees apart) of the phase voltages generated by the alternator, the correct SCR must be fired in the correct order to control conduction properly. Thus, there is only one solution for the order of the SCR triggers for a given alternator phase order and alternator rotation direction. The directionality is brought about by the fact that if the rotation of the alternator is reversed, so too is the phase order of the outputs, necessitating reversal of the SCR trigger timings.
Referring to
The features of this arrangement are:
As in the embodiment of
Lower losses due to lower conduction drop. Typically a diode has lower conduction drop than a SCR. Since only one SCR and one diode are involved in the current path to the output, the conduction losses will be lower than for 2 SCRs.
In both
It should be noted that the control circuitry previously disclosed for conventional 3 phase controlled bridges, will control the alternative configuration of
Referring now to
As previously noted there is a need for a compact high power alternator wherein a desired output voltage can be achieved by changing the number of turns of the phase pole coil, that is relatively easy to wind, and minimizes the consequence of short circuits, while at the same time facilitating cooling. In accordance with various aspects of the present invention this is achieved by employing a predetermined number of pole phase coils, preferably equal to the number of magnetic poles, with pole phase coil wound with enough turns [of a relatively small diameter wire] to generate the required output voltage of the alternator and a fraction of the output current equal to 1 divided by the number of magnetic poles and connecting the individual pole phase coils in parallel, preferably employing conducting phase rings 138. Use of conducting phase rings 138 not only greatly simplifies assembly of alternator 102, but also facilitates cooling of the windings.
Referring now to
Output terminals 126 and fusible links 124 are positioned radially about conducting phase rings 138. conducting phase rings 138 are made of a suitable conductive material e.g. brass or plated copper. The conducting phase rings may be formed of rod stock or punched from a sheet of appropriate material. In the preferred embodiment the conducting phase ring is continuous e.g. a single piece which would necessitate soldering or brazing together the ends of a formed conducting phase ring. Conducting phase rings 138 are fastened to non-conducting conducting phase ring mounting structure 1712 preferably made of a high impact resistant and chemically stable material e.g. polyamide-imide, so that each conducting phase ring, one for each phase output, are isolated electrically from each other and rear endplate 1706. Conducting phase rings 138 are positioned in air passage 1710 to maximize exposure to air flow produced by alternator 102 and directly over stator 1708.
Fusible link 124 is made of a suitable material e.g. a calculated diameter and length of wire (preferably plated copper) that will melt when subjected to loads calculated to be destructive to alternator 102, control 100 or electrical systems being powered by said equipment. In the preferred embodiment fusible link 124 is soldered or brazed to both the threaded conducting stud 1716 and conducting phase ring 138. An alternate method to secure the fusible link is to attach a suitable lug to the end of fusible link 124 which is then fastened to stud 1716 mechanically by means of a threaded nut.
Referring now to
Referring now to
Referring now to
This construction results in a number of advantages, both during construction of the alternator and during operation of the alternator.
Referring now to
Referring now to
4. Referring now to
Although the present invention has been described in conjunction with various exemplary embodiments, the invention is not limited to the specific forms shown, and it is contemplated that other embodiments of the present invention may be created without departing from the spirit of the invention. Variations in components, materials, values, structure and other aspects of the design and arrangement may be made in accordance with the present invention as expressed in the following claims.
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|22 Nov 2006
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|Electricity production circuit
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|Bayerische Motoren Werke Aktiengesellschaft
|Method of controlling an onboard power supply system for a motor vehicle
|21 May 2007
|22 Nov 2007
|Kolomeitsev Sergei F
|Systems and methods for maximizing the output of a vehicle alternator
|31 May 2007
|6 Dec 2007
|Flannery Patrick S
|Power conditioning architecture for a wind turbine
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|Dr. Ing. H.C. F. Porsche Ag
|Method and apparatus for setting a setpoint output voltage of a generator which is disposed in a motor vehicle
|29 Jun 2006
|3 Jan 2008
|Hamilton Sundstrand Corporation
|Coarse voltage regulation of a permanent magnet generator (PMG)
|13 Sep 2006
|27 Mar 2008
|Brian Welchko
|High power permanent magnet alternator with improved controlled output
|7 Sep 2007
|15 May 2008
|Minks Floyd M
|Power System for Producing Low Power DC Voltage at a Level Above a Peak Value of an AC Input to the System
|16 Sep 2008
|19 Mar 2009
|Denso Corporation
|Apparatus for charging on-vehicle battery and apparatus for controlling generating operation of on-vehicle generator
|9 Jun 2008
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|International Business Machines Corporation
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|24 Jun 2008
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|General Electric Company
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|Mark Naden
|Power system having a local sense control dominant over a remote sense control to avoid effects of interconnection failure modes
|2 Aug 2010
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|Scott Harold C
|Controller for ac generator
|2 Aug 2010
|3 Feb 2011
|Lafontaine Charles Y
|Compact high power alternator
|25 Sep 2009
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|General Electric Company
|Multi-use energy storage for renewable sources
|23 Dec 2010
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|Astronics Advanced Electronic Systems Corp.
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|U.S. Classification
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|International Classification
|Cooperative Classification
|European Classification
|10 Jul 2006
Owner name: MAGNETIC APPLICATIONS, INC., COLORADO
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KOCH, STEWART C.;LAFONTAINE, CHARLES Y.;WILLIAMS, DAVE E.;AND OTHERS;REEL/FRAME:018053/0528
Effective date: 20060613
|4 Aug 2011
|Fee payment
Year of fee payment: 4
|18 Sep 2015
|Maintenance fee reminder mailed
|5 Feb 2016
|Lapse for failure to pay maintenance fees
|29 Mar 2016
|Expired due to failure to pay maintenance fee
Effective date: 20160205


text:
IRVINE, Calif.--(BUSINESS WIRE)--Ryan Steelberg, CEO of Brand Affinity Technologies, Inc. (BAT), the expert in activating, engaging and monetizing the fan, will be a featured presenter and judge at this year's On Deck Sports and Technology Conference, a forum for executives, entrepreneurs, startups and fans to discuss the key ideas and innovations in the sports industry. BAT will also serve as the official photo sponsor, bringing former New York Knicks' player John Starks to take pictures with attendees during the conference. This year's On Deck will be held on Tuesday, February 12 at the Bohemian National Hall in New York City.
At the conference, Steelberg will serve as one of the select "Rapid Fire Presenters." These solo presentations are given by leading innovators, technologists and entrepreneurs discussing emerging trends and products in sports technology. Steelberg specifically will focus on fan-engagement, including examples of how sports brands can enhance the fan's experience through content and activation. His expertise has played a significant role in the evolution of BAT's innovative technology, as well as its Fan Photos photography platform. Steelberg's work has been recognized with numerous accolades, including Sports Business Journal "Forty under Forty" naming him as one of the best and brightest young executives in sports business.
In addition to presenting, BAT will be sponsoring the On Deck Pitch Contest, where a group of six early-stage sports tech startups will pitch their products in front of an all-star panel. Steelberg will serve as one of the expert judges alongside luminaries Alexis Ohanian (Reddit), Matt Higgins (RSE Ventures), Eric Winter (Yahoo! Sports), Ryan Spoon (ESPN Digital Media), and Ben Lerer (Lerer Ventures).
As the official photography sponsor of the conference, BAT will introduce its unique Fan Photos photography platform to On Deck attendees. Through this platform, people will be able to have their photos taken throughout the conference and take a picture with legendary basketball player John Starks, formerly of New York Knicks. Once their photos are taken, attendees and fans can easily view and download their photos for free by visiting the Fan Photos site and entering a specific code provided to them by BAT's photographers. The service makes it easy for anyone to find their own photo in just one step, without having to click through the thousands taken during the day.
The On Deck Conference is one of many events to showcase the Fan Photos platform. The company has already expanded its photo offerings to major brands and sporting leagues across the county. Its current partners include MLB Advanced Media, L.P., as well as individual teams such as the Boston Celtics, San Francisco Giants, Detroit Tigers, Los Angeles Angels, and St. Louis Cardinals.
About Brand Affinity Technologies
Brand Affinity Technologies (BAT), founded in 2007, is a technology and marketing services company focused on activating, engaging, and monetizing fans. BAT's offerings power highly-targeted and interactive 360 deg fan-centric experiences and promotions. Its partners include thousands of celebrities, athletes, professional sports teams and leagues, and event promoters. For more information, visit http://www.brandaffinity.net.

subset: commoncrawl


text:
Historic Homes and Designer Homes in Kennebunk
May 21, 2012 by Kate & David Parisi
A summer vacation in the Kennebunks necessitates lounging on beaches, perusing the shops of Dock Square, and consuming lobster rolls. Beyond that, there are whale watching cruises, lighthouses to visit, and dozens of restaurants to try.
For architecture and history buffs, there are also historic homes and Designer Homes to tour.
The history of Kennebunk and Kennebunkport is long and rich. First settled (by white folks) more than 360 years ago, the area has been a shipbuilding hub, a thriving port, and a summer destination for the rich and famous. It's no surprise that Kennebunk and Kennebunkport are home to numerous historic buildings.
The Kennebunkport Historical Society offers tours of several historic homes in town, such as:
- Nott House. A Greek Revival home from 1853.
- Benson Blacksmith Shop. A historic and blacksmith shop that still has a working forge.
- Town House School. A charming one-room school house from 1900.
Read the rest of this page »


text:
BRAZIL: Shoe Exports Top $106m In November
Brazilian shoe exports rose four per cent last month to $106 million from $102m in the year-ago period, industry chiefs revealed on Tuesday.
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text:
Mr. Defecation wrote:Can you add in the op next to my server info looking for any admin volunteers
[B]Minimum Frostbite PC Specs[/B]
* Processor: Core 2 Duo @ 2.0GHz
* Main memory: 2GB
* Graphics card: GeForce 7800 GT / ATI X1900
* Graphics memory: 256MB
* OS: Windows XP
* Free HDD space:
o 15GB for Digital Version, 10GB for Disc Version (BFBC2)
o 10GB for Digital Version, 4GB for Disc Version (BF1943)
[B]Recommended Frostbite PC Specs[/B]
* Processor: Quadcore
* Main memory: 2GB
* Graphics card: GeForce GTX 260
* Graphics memory: 512MB
* OS: Windows Vista or Windows 7
* Free HDD space:
o 15GB for Digital Version, 10GB for Disc Version (BFBC2)
o 10GB for Digital Version, 4GB for Disc Version (BF1943)
Ok, with that out of the way, here are the steps to killing mouse smoothing and fixing those slow turrets:DISCLAIMER: This fix involves changing values within key game files that are relied upon to properly run BFBC2. It is advised that you back up these files prior to editing, and that you don't go changing any values outside the ones shown below. Use this fix at your own risk, you assume all responsibility if you mess up your game.
I think this bears repeating:
To easily add some PA servers (Angry Dome in particular) to your Favorites tab, edit GameSettings.ini (Found in MyDocs/BFBC2) and add:
75443431,958a33dd-6071-4f61-bb1e-bfe803481ae5,The Angry Dome;3789002014,22595a7b-ccf6-404f-97ea-b854175e34d4,Penny Arcade West Coast Server;2408473747,c8876d1f-8914-4edd-a77e-b63930390661,Black House Combat [Seattle];
That'll add The Angry Dome, PA West Coast, and Black House Combat. I couldn't find any mention of the other PA servers while digging around for these. This should go in the OP. Also, add Zetty to the PC-EA Account Thing.
Haven't tried it. Won't be able to tonight, it's 4am. Looking forward to more chopper killings tomorrow.
Also, medics have been reduced to something akin to a health dispenser/stationary turret.
So, choppers are basically useless now on the PC? Or perhaps flairs (VSmoke) will become essential pilot equipment?
So, choppers are basically useless now on the PC? Or perhaps flairs (VSmoke) will become essential pilot equipment?
Wait do VSmoke really act as flares?
Man, once these fixes hit the 360, there will be maybe 40 people left playing.
Steam: Brainling, XBL / PSN: GnomeTank, NintendoID: Brainling, FF14: Zillius Rosh SFV: BrainlingOh c'mon FyreWulff, no one's gonna pay to visit Uranus.
It was probaly a patch for the Dr. Pepper promotion. It'll probaly take them a while to get the patch over to the consoles, and based on how things pan out on the PC, it'll probaly be a little different.
SoundsPlush wrote: »Hey, maybe the update will give LMGs massive spread with negative spray so they actually get more accurate as they fire like they claim they do. That'd be cool. Also, unicorns.
Weapons universally recover 3.0 degrees of spread per second.
As of Patch R7, LMGs recover 5.0 spread a second, resulting in greater accuracy with successive shots.
Spread and recoil are always recovering, even while firing, in between shots.
Nah, not even close. At long range it kills one or two bullets faster. Big deal.I'm not happy about the M16 change, at all. I haven't tried it yet, but from the way it reads, the AN-94 is now basically the M60 of AR's and there is little reason to use much else.
Pajama_Man wrote: »The overall class changes are nice.
I'm a little irked by the change they made to the bolt action sniper's minimum damage range though. It kind of throws out the little bit of uniqueness that they had between them.
Oh well. All things considered, the SV-98 got a range buff
SoundsPlush wrote: »I'm 90% certain I was using VSmoke when piloting a Blackhawk last night and right clicking produced no flares. Does it only work on attack helis?
To be fair, those people were already using the AN-94, since there are only five total guns in the 360 version.
Why does the AN-94 need a buff, again?
We're you traced at the time? I think it might only work once you're traced. It's been so long since I've used it though
To be fair, those people were already using the AN-94, since there are only five total guns in the 360 version.
Why does the AN-94 need a buff, again?
The AN94 was probably buffed because at range, the second shot always misses.
Significantly increased the speed of the Tracer Dart projectile to make it more effective against airborne targets.
No flares on the Apache either. Someone has been lying. Get in the angry dome, we'll test the 'being traced so you get flares' thing.


text: Does anyone know why the flag of the Union of Allied Planets was changed from the Sino/American Flag in the series to the more space based one in the film? It seems like a good deal of Firefly's Chinese and old west elements were sharply downplayed in Serenity. Does anyone know why?


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I have purchased a new to me 93 k75s .When i purchased the bike it neede a few repairs but the bike ran and started . The only indication orf a problem was the ABS light and the hazard warning light was on.
I replaced both the leaking brake lines front and rear and found a bad rear brake light switch which i replaced. We bled the system and all the brakes worked great.Reset the ABS computer to attempt to shut off the warning lights. Started the bike and took it for a test ride with no problems other than the Abs light starteed blinking again. I parked the bike and left it over night the next day whent to take it for a ride I turn the key and everything is dead except the clock. Here is what I checked
1. Battery at 13 volts but drops drastically if ignition switch is turned on
2. checked ignition switch with ohmeter seems to work properly
3. checked all fuses
4.checked ground connections
5. checked relays and unplugged ABS system no change
Any body have any ideas


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"We had a lot of excellent plays," Lady Cyclones head coach Cindy Jones said. "We had great defense by Grace Roys and Meredith Darnell. It was a good game and a lot of girls got to go in."
Roys totalled 12 digs and Dardnell had 15. Hunter Eshnaur had 17 kills, Addy Hipps had eight and Madison Mckinley added seven.
The junior varsity won its match 25-18, 25-14. Ashton Sitkowski had nine kills, Alice Bewley had four blocks and Shameka Ealy had three blocks.
"The junior varsity was a little nervous as first, but then they played really well together by the end," Jones said.
Russellville travels to Conway (3-0) tonight for the Lady Cyclones' 7A/6A-Central Conference opener. The Lady Wampus Cats beat Fayetteville 3-0 on Tuesday.
"This will be one of our toughest battles all year," Jones said. "It should be fun."
RJHS East
The Eastside hosted and beat Morrilton on Wednesday at RJHS Gym.
The eighth-grade Lady Whirlwinds won the first game 25-12. Alyssa Sparks had two poins and one ace. Tamera Rhode had three points. Astrid Christianson had five poins and two aces.
RJHS East (4-0) won the second 25-19. Mary Katelyn Byrd had five points, one ace and one kill. Rhode had four points and one kill. Christianson added one kill.
The ninth-grade Eastside black squad won 25-18. Marissa Williams had six points and two aces. Tyona Baty had three kills. Susan Gray added one kill.
The red Lady Whirlwinds won 25-15, 25-16. Emily Posey had six points, once ace and one kill in the first game. Bailey Wilbers had five points and three kills.
Ariston Gray scored three points. Kaitlyn Womack had one kill. Brittany Pehrson added three kills.
Wilbers had two points, three aces and one kill in the second game. Posey had two kills. Pehrson netted three aces.
Eastside swept Fort Smith Trinity on the road Tuesday. The seventh grade won 25-5, 25-5.
The eighth-grade won 25-7, 25-15. Hanna Jones had six points and one ace in game one. Meredith Duffield scored three points. Madison Mallett scored four points. Christianson scored three points, and Rhode added one kill. Jones scored eight points in game two, Sparks scored three points and Mallett scored six points.
The ninth-grade black East Lady Whirlwinds won 25-17. Hannah Rickman scored six points, and Marissa Williams added four. Baty had two kills and one dink.
The red team won 25-14, 25-20. Posey scored seven points in game one. Womack had three points, one ace and one block. Ariston Gray scored three points. Wilbers had four kills, while Cassie Johnson added one kill.
Posey and Womack each scored three points in the second game. Gray had three points and one kill. Wilbers had six points, one kill and one dink.
RJHS East (4-0) and West will compete in Saturday's 18th annual Lady Whirlwind Invitational.


text:
How Can He Do More?
- 1-0 Brewers
On Saturday, we lost 1-0. Ben Sheets threw a complete game shut-out. Jake was incredible. He goes out there and gives the team a chance to win, but we have failed him so many times. He was so amazing, and yet he blames himself for the loss. Listen to this: "I am embarrassed. Nine and ten, no matter what, that's embarrassing to me. I'm not going to finish (the season) with a losing record." In Jake's words, you can tell that he expects more of himself. He is going to go out there fighting for a win. He gave up 1 run for goodness sakes!! I know he expects a lot of himself, but how do you get better than 1 run in 7 innings? Complete game no-hit shutout every sixth day? He is doing his best. It's his offense that is having problems. Luis Rodriguez had 3 hits. Chase Headley had 2. Except for a walk to Josh Bard, that was it. We had a few chances, but it wasn't Jake who was embarrasing: it was his offense.


text:
Karzai's Deputy spokesman Hamed Elmi would not say when the meeting with the delegation from Hizb-i-Islami took place nor did he give any details of what was discussed. A member of Hizb-i-Islami, which is led by former Prime Minister Gulbuddin Hekmatyar, said the meeting occurred on the morning of March 22 and that further talks were expected.
"I can confirm that a delegation of Hizb-i-Islami has arrived in Kabul with a plan and has met with the president," Elmi said.
AFP news cited a Hizb-i-Islami sposkeman, Haroon Zarghon, who said: "A delegation comprising senior members of Hezb-e-Islami is in Kabul with a 15-article peace plan to discuss with the government."
The group's leader, Hekmatyar, received generous U.S. military aid during the fight by the Afghan Mujahedeen freedom fighters against the Soviets in the 1980s, but Washington withdrew its support because of his role in the Afghan civil war that followed the Soviet withdrawal. Hekmatyar was considered a close ally of al-Qaeda leader Osama bin Laden, but in 2007, he offered to negotiate with the Karzai government.
Unlike some other Mujahedeen who formed political movements and sent representatives to Parliament, reports the New York Times, Hekmatyar has continued to sponsor fighters in eastern and northern Afghanistan, although he does not live in Afghanistan and is believed to be in Pakistan.
The Times reported that President Karzai is planning a peace jirga, or assembly, to be held near the end of April, and he is issuing invitations to a number of insurgent groups as well as to representatives of different factions in Parliament and Afghan civil society.
However, noted the Times, not all senior officials in Karzai's government have totally endorsed negotiations with such notorious enemies as Hekmatyar. Afghanistan's first Vice President, Marshall Muhammad Qasim Fahim, spoke cautiously in an interview on March 22, saying, "We believe in peace and reconciliation, but step by step."
An AP report said that the concept of holding talks with the Taliban and other insurgent groups is gaining popularity in Afghanistan, even as thousands of U.S. and NATO reinforcements are streaming into the nation to counter the insurgents' momentum. The report noted:
Besides finding ways to reconcile with insurgent leaders, the Afghan government is finalizing a plan to use economic incentives to lure low- and mid-level fighters off the battlefield. Regional countries such as Pakistan, India and Iran have begun staking out positions as the 8-year conflict nears an endgame.
AP reported that officials of Hizb-i-Islami said the delegation brought a 15-point peace plan to the table, which calls for all foreign troops to leave Afghanistan within six months, beginning in July. This is a full year before President Obama plans to start withdrawing U.S. forces.
Hizb-i-Islami's chief spokesman, Harun Zarghun, said the delegation also hopes to meet with Taliban leaders somewhere in Afghanistan. The U.S. Embassy, however, said there would be no meetings between the group and U.S. officials.
AP also cited the UN's former envoy to Afghanistan, Norwegian diplomat Kai Eide, who said last week that he and other UN officials had been in discussions with senior Taliban officials since last year, but that the arrests of Mullah Baradar and other senior Taliban figures halted the dialogue.
A report from the Russian Novisti news agency noted:
The Islamic Party [Hizb-i-Islami] plans to hold talks with the radical Islamic Taliban group, which controls the country's east. The movement was toppled in a 2001 U.S.-led campaign, but mounted a resurgence of late, with regular attacks on police and troops.
The International Security Assistance Force (ISAF) currently has some 89,000 troops in Afghanistan, with most of them deployed in the country's volatile south and east.
However, a Taliban spokesman has claimed that the movement has decided to refrain from attacks on schools and hospitals, and has also offered to assist with the construction of new such establishments.
U.S. President Barack Obama has pledged to send an additional 30,000 soldiers to the war-ravaged country in the first part of 2010 to defeat the Taliban and establish law and order. Other NATO members have said they will send 7,000 additional troops to Afghanistan.
Anyone considering the sequence of events occurring in Afghanistan since the U.S.-led invasion in 2001 must surely scratch his head in puzzlement. That invasion, launched in response to the 9/11 attacks masterminded by al-Qaeda leader Osama bin Laden (who once received covert U.S. support to fight the Soviet occupiers of Afghanistan) was waged for the expressed purpose of removing the Taliban government that had provided bin Laden with a safe haven and base of operations.
After the UN-established International Security Assistance Force (IAAF) (which, like most UN forces, was comprised mostly of U.S. troops) succeeded in ousting the Taliban from Kabul, the nation's capital, and other centers of power, the coalition helped Hamid Karzai assume power. The United States and the West have helped prop up Karzai ever since, sending an ever-growing number of troops to help prevent the Taliban from re-asserting control.
Curiously, however, Karzai issued an appeal during his acceptance speech last November 3 to "to bring peace to this soil" and said that Afghans should "ask our Taliban brothers and others to return and embrace their own land."
Will Karzai succeed in negotiating away what U.S., British, and other Western troops have won through sweat and blood?
Furthermore, if U.S. troops are ever completely withdrawn form Afghanistan, will we see a rerun of our years of similar sacrifice in Vietnam, whose corruption-riddled government collapsed shortly after we withdrew?
Such is the fate of a nation that ignores the wisdom of its founders against becoming involved in entangling alliances, and its own Constitution that mandates that wars must be declared by Congress.
But those who point out the folly of such unrestrained interventionism are branded as "isolationists."
Photo: Sgt. Kevin Garcia tries to teach the peace sign to Afghans: AP Images


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The Learning Revolution: A Lifelong Learning Programme for the World's Finest Computer : Your Amazing Brain
Jalmar Press, 1994 - Cognitive styles - 524 pages
A lifelong learning program for the world's finest computer: your brain! This book provides simple techniques that will enable everyone to learn anything faster & more effectively! Offers simple yet effective techniques to take control of your future as a parent, student, teacher, administrator, business or government leader! THE LEARNING REVOLUTION faces the challenges of today's educational system by offering hundreds of practical solutions: * How to learn the basics of a foreign language in only four to eight weeks! * How to catch up at school--even if you start well behind others! * Simple methods of learning to learn & learning to think for new ideas so that all can relearn throughout life & make the most of new opportunities. THE LEARNING REVOLUTION is based on the argument that everyone in the world faces an ever-greater challenge; a revolution in learning "for all to share in an age of potential plenty." This book was inspired from research, study, practice, & experience by its two authors Gordon Dryden & Jeannette Vos, Ed.D. Their combined determination demonstrates this simple philosophy: * Virtually everything is now possible. * Where problems have not been solved, we now have simple techniques to produce a new solution! * We are now at a key historical break-point! The challenge is here - THE LEARNING REVOLUTION is the answer!
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text:
If you thought promotional pens were boring, you've never explored the selection of creative writing instruments offered by ePromos! Forget basic pens and pencils – we offer a wide and colorful collection that's sure to entice users of all ages. Advertising is easy with cost-effective and attention-grabbing pencils, pens, styluses and gift sets inscribed with your business name. We go from plastic all the way up to high-quality expensive brand names. Browse by color, industry, price, and more to find just the right item to promote your brand.
A musical twist on the promotional pencil.
A musical twist on the personalized pen.
A musical twist on the promotional pencil.


text:
© 2009 MLB Advanced Media, L.P. All rights reserved.
Wilson, Giants stunned by Cubs in ninth
Closer allows go-ahead homer; NL Wild Card deficit at four
By Chris Haft / MLB.com
SAN FRANCISCO -- With terrible swiftness Thursday night, the mood surrounding the Giants went from soaring to sickening. Though they received their usual paucity of offense, the Giants did everything they had to do to defeat the Chicago Cubs and revive their hopes for securing the National League Wild Card postseason berth -- except finish the task at hand. Needing one strike to conclude a stirring victory for the Giants, closer Brian Wilson yielded Jeff Baker's two-run homer that lifted the Cubs to a 3-2 triumph. Given Wild Card-leading Colorado's 5-4 loss to San Diego, the Giants would have trimmed their deficit to three games behind the Rockies (86-67). Instead, San Francisco (82-71) remained four games back with nine to play and fell into a third-place tie with Florida in the Wild Card standings, a half-game behind Atlanta (82-70). "Even going into tonight, we were in a tough spot," Giants starter Brad Penny said. "If you look at the numbers, tonight was huge for us. Unfortunately, we didn't get it done. Mathematically, we're still not out of it -- if we win nine in a row and hope [the Rockies] lose." Penny was a central figure in the Giants' briefly enchanted evening. He limited the Cubs to a single run in eight innings. The right-hander appeared destined for his fourth victory in five outings as a member of the Giants with the support of John Bowker, who drove in both San Francisco runs off Cubs starter Ryan Dempster with a fourth-inning double and a seventh-inning, tiebreaking homer. "I see the ball out of his hand pretty well," said Bowker, who's 4-for-8 in his brief Major League career against Dempster. "He has a good split-finger [fastball] I was having trouble with. He got a couple of pitches up that I was able to handle." Bowker was starting partly because Randy Winn had struggled against Dempster (2-for-22 lifetime) and Nate Schierholtz was stricken by food poisoning. Bowker's presence, along with his deeds, gave the Giants a charmed look. Soon, they were cursed. In came Wilson (5-6), who had converted his eight previous save opportunities, to protect the 2-1 lead. He walked Derrek Lee on a full-count pitch but recovered by retiring Micah Hoffpauir and Mike Fontenot on popups. But with the Giants believers in the paid crowd of 31,603 standing and yelling in happy anticipation, Baker planted Wilson's 2-2 fastball in the left-field seats. Wilson left the Giants' clubhouse before reporters gained access to it. Asked where Wilson wanted to throw the fateful pitch to Baker, catcher Eli Whiteside replied, "Obviously, not where it was. Further inside, I guess." Second-guessers might revel in declaring that Giants manager Bruce Bochy should have stuck with Penny, who had thrown 94 pitches. But Penny himself defended the call for Wilson. "Nine times out of 10 he saves that game," Penny said. "I'd give the ball to him in the ninth anytime he wanted it. He's an outstanding closer. There's not many better than him." Penny added that he would have been facing Chicago's 3-4-5 hitters for the fourth time, implying that familiarity could have bred disaster.
"And you've got a guy in the bullpen who's fresh and throws 100 [mph]. To me, it's a no-brainer. Every manager in the game would go to his closer right there, especially in a one-run game."Bochy anticipated the Penny-or-Wilson question before it was asked. "We had the right guy there," Bochy said. "I'll never have a problem with the job he's done. We wouldn't be here without him." True enough. Entering Thursday, the Giants owned a 73-1 record when leading after eight innings, due largely to Wilson. You could almost hear the hard swallowing as that changed to 73-2.
Chris Haft is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.


text: Blue Lady Resort - Deals & Coupons See more about this business Fully equipped housekeeping and deluxe cabins with television, coffee maker, patio, grills, private lighted fishing and swimming docks; boat rental, guided fishing trips; children's playground; fax service; some pet-friendly cabins available. Find Deals and Coupons Key: Deals Coupons Sorry! No deals found for this search. Showing 1 - 0 of 0 Page: « Previous Next View: 20 per page 50 per page 100 per page Find more deals


text:
Ram Outdoorsman Comes to NBC; Starring the Ram Outdoorsman
Do you like hunting and fishing and the great outdoors? Do you like tough trucks driving through rugged terrain? Do you think you're the only one? Well neither does the NBC Sports Network. In fact, they're banking on it so much that they're launching a new television series starring none other than the Ram Outdoorsman!


text:
Hi Gerbils. A friend is asking me to help her resolve a network problem. She has two wireless routers, one is a Linksys (Router 1) and the other is a Cisco (Router 2). Router 1 is connected to the Internet, and is the 'main' router, while Router 2 is connected (daisy chained, I believe it's called) to Router 1 via a LAN cable. I believe this setup should allow all PCs connected to Router 2 access to the PCs connected to Router 1, but the problem is, her PC (connected to Router 2) cannot view the PCs connected to Router 1 although she told me she can ping those PCs connected to Router 1 just fine. Any thoughts? I'm admittedly not very good with networking stuff, so go a little easy on me.
Many thanks in advance.


text:
Okay, I need help installing the MadWifi 9.04 drivers for my D-Link DWA-542.
I get errors when I type in _make and then _make install.
Could someone provide me with REALLY clear instructions and stuff I need to download (Ubuntu 8.04 clean install) , or even better provide me with a .deb file for the drivers(can only access Internet through Vista, so need all the files at once so that I don't have to reboot back and forth) ?