Working Principle of switching power supply

by：MOSO     2020-02-25
Working Principle of switching power supply: 1. AC power input is rectified and filtered into DC; 2. Through high frequency PWM (Pulse width modulation) The signal controls the switch tube and adds the DC to the primary of the switch transformer; 3. Switching transformer secondary induction of high frequency voltage, through the rectifier filter supply load; 4. The output part is fed back to the control circuit through a certain circuit to control the PWM duty cycle so as to achieve the purpose of stable output. When the AC power supply is input, it usually needs to pass through something like the current circle to filter the interference on the power-down grid, and at the same time filter out the interference of the power supply to the power grid; At the same time of power, the higher the switching frequency, the smaller the volume of the switching transformer, but the higher the requirement for the switching tube; The secondary of the switching transformer can have multiple windings or one winding can have multiple taps to obtain the required output; Generally, some protection circuits should also be added, such as no-load, short-circuit and other protections, otherwise, it may burn down the switching power supply. High-power switching power supply has been widely used in industrial automation control, military equipment, scientific research equipment, industrial control equipment, communication equipment, power equipment, instruments and meters, medical equipment, semiconductor refrigeration and heating. and other fields. Dear Customer: Hello! Welcome to our website. Your current position is our switching power supply product page. This page is relatively simple to introduce. If you are interested in this product, if you want to know more about the relevant information, please remind you that you can get in touch with us by viewing other pages or leaving messages or calling us to further understand the relevant product information. We look forward to your call. In addition to the above products, the company also supplies imported railway power supply 110 V, COSEL power supply and other products. Our company has * actual combat technology and professional operation team, to create a service based on user experience for you, the perfection of service is our endless pursuit. Because people-oriented, so trustworthy; Because of professional full-time, it is worth choosing. The above information is for reference only. For details, please call the relevant staff to answer your questions.
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