Totem-pole bridgeless power factor correction circuit

A technology of power factor correction and totem pole, which is applied in the field of totem pole bridgeless power factor correction circuit, can solve the problems of long reverse recovery time of switching devices and achieve the effect of small reverse recovery current

Inactive Publication Date: 2011-07-20
EMERSON NETWORK POWER ENERGY SYST NORTH AMERICA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to provide a totem pole bridgeless PFC circuit to solve the problem of long reverse recovery time of switching devices, and to realize the totem pole bridgeless PFC working in the current continuous mode.

Method used

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  • Totem-pole bridgeless power factor correction circuit
  • Totem-pole bridgeless power factor correction circuit
  • Totem-pole bridgeless power factor correction circuit

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Embodiment Construction

[0017] The present invention will be further described in detail below through embodiments in conjunction with the accompanying drawings.

[0018] see figure 1 , in one embodiment, the totem pole bridgeless PFC circuit includes a switch tube series branch with a first switch tube S1 and a second switch tube S2 and a rectifier diode series branch with a first rectifier diode D1 and a second rectifier diode D2 The middle node of the switch tube series branch is connected to one end of the AC power supply through the inductance branch Ls, the middle node of the rectifier diode series branch is connected to the other end of the AC power supply, and the two ends of the switch tube series branch and the rectifier diode series branch The positive and negative bus bars are respectively connected, and the positive and negative bus bars are also connected in parallel with a capacitor Cb and a load RL at the output end. Different from the conventional totem-pole bridgeless PFC circuit, ...

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PUM

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Abstract

The invention discloses a totem-pole bridgeless power factor correction circuit which comprises a switching tube series branch and a rectifier diode series branch, and also comprises two series diodes and two parallel diodes, wherein the switching tube series branch is provided with a first switching tube and a second switching tube, the rectifier diode series branch is provided with a first rectifier diode and a second rectifier diode, the two series diodes are respectively serially connected between the first switching tube and a negative busbar and between the second switching tube and a positive busbar, the two parallel diodes are respectively connected in parallel between a common terminal of the first switching tube and the positive busbar and between the common terminal of the second switching tube and the negative busbar, wherein reverse recovery time of the parallel diodes corresponding to the first switching tube is less than that of the first switching tube, and reverse recovery time of the parallel diodes corresponding to the second switching tube is less than that of the second switching tube. Because reverse recovery characteristics of the parallel diodes are better, a reverse recovery current is smaller without damaging the totem-pole bridgeless power factor correction (PFC) circuit working in a CCM (Coincident-Current Memory) mode.

Description

technical field [0001] The invention relates to power electronics, in particular to a totem pole bridgeless power factor correction circuit. Background technique [0002] Totem-pole bridgeless power factor correction (Totem-pole bridgeless Power Factor Correction) circuit is a topology that can simultaneously achieve high efficiency, high power density, and reduce common-mode noise. Such as figure 1 As shown, a typical totem pole bridgeless PFC circuit includes two switching devices S1, S2 connected in series and two rectifier diodes D1, D2 connected in series, and according to figure 1 way to connect. If operating in continuous current mode (CCM), one switching device is turned off immediately after the other switching device is turned on. Since the reverse recovery time of the switching devices S1 and S2 is relatively long (the reverse recovery characteristics of the switching device depend on the parasitic body diode in the switching device), so when a switching device...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/42
CPCY02B70/126Y02B70/1483H02M1/4225Y02B70/10Y02P80/10H02M1/0085
Inventor 屈云生首福俊
Owner EMERSON NETWORK POWER ENERGY SYST NORTH AMERICA
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