PHASE COMPENSATION FOR POWER FACTOR CORRECTION CIRCUIT TO REDUCE ZERO-CROSSING DISTORTION

A method for phase compensating a power factor correction circuit (1) is provided. Firstly, a present current value of an input current (Iin) is sampled, and the sampled signal is filtered. Then, a present waveform of the input current (Iin) corresponding to the present current value of the filtered...

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Bibliographische Detailangaben
1. Verfasser:	Beinlich, Dominik Reinhard
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION
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Beschreibung
Zusammenfassung:	A method for phase compensating a power factor correction circuit (1) is provided. Firstly, a present current value of an input current (Iin) is sampled, and the sampled signal is filtered. Then, a present waveform of the input current (Iin) corresponding to the present current value of the filtered sampled signal and a previous waveform of the input current (Iin) corresponding to a previous current value of the filtered sampled signal are predicted, and a current error signal is generated according to a difference between the present waveform and the previous waveform. Then, the current error signal is adjusted, and an adjusted signal is generated. Then, a feedforward signal (D_ff) is added to the adjusted signal, and a phase compensation signal (D_comp). Then, a current control signal (D_curr_ctrl) is added to the phase compensation signal (D_comp), and a pulse width modulation signal (D_pwm) is generated to control a switching circuit (10).