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Generation method and circuit device of digital speed and rotational angle information

PURPOSE: To improve resolution by performing the digital conversion of a rotary transfer equipment signal, taking out a digital speed word using an adjustment algorithm, using an angle word generated by numerical integration, and performing the amplitude modulation of carrier vibration. CONSTITUTION: A rotary transfer equipment signal transmitted from the rotor coil winding of a resolver 1 is supplied to the A/D converter input side of a microcontroller 3 via an amplifier 2. Then, the microcontroller calculates a rotational speed word ω using an adjustment algorithm, transmits it via a tentative memory 15, calculates an angle ψ by integrating the rotational speed word ψ, and outputs it via a temperature memory 16. Then, the microcontroller 3 reads the sinusoidal and cosine values of the angle ψ from a program and data memory 5 and supplies them to a D/A converter 6. Also, the sinusoidal and cosine values are accumulated by capacitors 11 and 12 during the half-wave continuation time of a carrier frequency. Then, modulation by the carrier frequency is performed by polarity switching using an analog switch 8, and sinusoidal and cosine signals that are modulated via amplifiers 13 and 14 are supplied to the stator coil winding of the resolver 1. COPYRIGHT: (C)1990,JPO