Totem pole power factor correction circuit employing semi power frequency periodic resonance soft switching structure
A technology of power factor correction and periodic resonance, which is applied in the direction of output power conversion devices, electrical components, high-efficiency power electronic conversion, etc., to achieve the effects of improving the efficiency of the whole machine, reducing switching losses, and reducing losses
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[0020] The technical solutions of the present invention will be further described below in conjunction with specific embodiments.
[0021] like figure 1 As shown, the totem pole power factor correction circuit (PFC) of the present invention that can realize resonant soft switching in half a power frequency cycle includes the main power circuit of the totem pole topology, and the auxiliary power circuit that realizes resonant soft switching for the totem pole PFC. switch circuit, input voltage zero-crossing detection circuit, input current detection circuit, output voltage detection circuit, and control the main power circuit and the The control circuit of the auxiliary switch circuit is described. The control circuit outputs a driving pulse according to the detection signals of the output voltage detection circuit, the input current detection circuit and the input voltage zero-crossing detection circuit, so as to control the auxiliary switch circuit and the totem pole power f...
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Abstract
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