A Power Factor Correction Control System
A power factor correction and control system technology, applied in the direction of output power conversion devices, climate sustainability, high-efficiency power electronic conversion, etc., can solve the problems of uncontrollable systems and incomplete sliding processes, etc., to eliminate unpredictable, The effect of eliminating system changes and ensuring stability
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[0061] Such as figure 2 A power factor correction control system is shown, including such as figure 1 A boost type power factor correction (PFC) circuit and a control unit are shown, and the control unit performs the following steps:
[0062] 1) Use the nominal value and variation to represent the component parameters of the power factor correction circuit, the grid voltage v in the step-up PFC circuit s =V s sin ωt, i s is the grid current, the output v of the rectifier bridge is not controlled in =|V s sinωt|, |g| is the absolute value operator, L is the input inductance, r L is the equivalent resistance of the inductor, S is the main switch, D is the output diode, C is the output capacitor, R l is the load resistance, i L and v o are the inductor current and the DC output voltage, respectively.
[0063] When S is turned on, the inductor L is in the energy storage stage, and the capacitor C is the load R l To provide energy, the current path as figure 1 As shown ...
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