Totem pole PFC current waveform zero-crossing optimization circuit and device

Abstract

The invention discloses a totem-pole PFC current waveform zero-crossing optimization circuit and equipment. The totem-pole PFC current waveform zero-crossing optimization circuit comprises a power circuit module and a control circuit module, the power circuit module comprises an alternating current power supply, an input voltage signal unit and a totem pole PFC circuit unit; the input voltage signal unit comprises a first output end and a second output end, and the first output end and the second output end form an input voltage output end; the totem pole PFC circuit unit comprises an inductor, a first field effect transistor, a second field effect transistor, a third field effect transistor, a fourth field effect transistor, a first resistor unit and a second resistor unit; the control circuit module comprises an input filter, a voltage outer loop control unit, a current inner loop control unit, a polarity judgment unit, a compensation unit, an adder and a comparator. According to the invention, the overcurrent crossover distortion compensation of the network current, namely the input current or the inductive current, is realized, the power factor is improved, and the harmonic current conduction is reduced.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a totem pole PFC current waveform zero-crossing optimization circuit and equipment. Background technique [0002] For power electronic converters powered by single-phase AC voltage, active power factor correction (PFC) technology or single-phase active power filter (APF) technology is required to suppress grid-side harmonic current and improve grid-side power factor, meeting the IEC61000-3-2 and IEC6100-3-12 harmonic current suppression mark. The power circuit and control circuit in the totem pole PFC, the power circuit includes two bridge arms, generally, one is a GaN FET or IGBT bridge arm with high frequency switching, and the other is a SiC FET or diode bridge arm with power frequency switching, the control The circuits include analog control circuits or digital control circuits. Totem pole PFC is an active power factor correction circuit. Like other PFC circuits,...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems existing in the above-mentioned prior art, the present invention proposes a totem pole PFC current waveform zero-crossing optimization circuit and equipment to solve the problem that the prior art does not have current zero-crossing compensation and the input current crossover distortion is serious

Images