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

Inactive Publication Date: 2017-08-18
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this scheme can only realize soft switching in the whole cycle of the power grid, that is, the positive half cycle and the negative half cycle.

Method used

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  • Totem pole power factor correction circuit employing semi power frequency periodic resonance soft switching structure
  • Totem pole power factor correction circuit employing semi power frequency periodic resonance soft switching structure
  • Totem pole power factor correction circuit employing semi power frequency periodic resonance soft switching structure

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Embodiment Construction

[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

The invention relates to a totem pole power factor correction circuit employing a semi power frequency periodic resonance soft switching structure. The totem pole power factor correction circuit includes a main power circuit for totem pole typology, an auxiliary switch circuit used for realizing resonance soft switching of the totem pole PFC circuit, an input voltage ZCP (Zero Crossing Point) detecting circuit, an input current detecting circuit, an output voltage detecting circuit and a control circuit controlling the main power circuit and the auxiliary switching circuit according to the voltage ZCP detecting circuit, the input current detecting circuit and the output voltage detecting circuit. The control circuit outputs drive pulses according to detection signals of the output voltage detecting circuit, the input current detecting circuit and the input voltage ZCP detecting circuit so as to control the auxiliary switch circuit and the totem pole PFC circuit to achieve resonance and enable zero voltage conduction of a power switching tube of the totem pole PFC circuit. Therefore, switching loss of the main circuit is reduced and the overall efficiency is improved.

Description

technical field [0001] The invention relates to a single-phase power factor correction circuit (PFC), in particular to a totem pole structure power factor correction circuit (PFC) capable of resonant soft switching within half a power frequency cycle. Background technique [0002] High efficiency, high power factor, and low cost have always been the development goals of power factor correction circuit (PFC) technology. Compared with the commonly used full-bridge PFC and Dual Boost PFC, the totem-pole PFC uses fewer power semiconductor devices, and the reverse recovery loss of the power-frequency diode is also small, which has advantages in efficiency and cost. . However, most of the power switch tubes of the existing totem-pole structure PFC work in a hard switching state, and the switching loss and voltage stress are relatively large. With the development of a new generation of high-speed semiconductor switching device technologies such as gallium nitride (GaN) and silico...

Claims

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Application Information

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IPC IPC(8): H02M1/42
CPCH02M1/4241Y02B70/10
Inventor 李国鑫和军平
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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