Composite active clamped single-phase A.C-D.C power factor correction transformer

A composite active clamp, single-phase AC technology, applied in the field of power factor correction converters, can solve the problems of reducing circuit efficiency and large switching loss of devices, and achieve the advantages of improving circuit efficiency, increasing power density and reducing switching loss. Effect

Inactive Publication Date: 2005-01-12
ZHEJIANG UNIV
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This single-phase AC-DC power factor correction converter is applied to the global universal power input and can realize power factor correction, but the circuit works in a hard switching state, and there is a reverse recovery problem of the diode, and the switching loss of the device is large, which limits the work. frequency increases, reducing circuit efficiency

Method used

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  • Composite active clamped single-phase A.C-D.C power factor correction transformer
  • Composite active clamped single-phase A.C-D.C power factor correction transformer
  • Composite active clamped single-phase A.C-D.C power factor correction transformer

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Embodiment Construction

[0010] refer to figure 2 , the composite active clamping single-phase AC-DC power factor correction converter of the present invention includes a rectifier circuit D1 composed of four diodes, an inductor L, a diode D2 and a main switch S1, and the main switch S1 is connected in parallel with the first capacitor C1, the diode D2 is connected in parallel with the second capacitor C2, one end of the inductance L is connected to the output terminal A of the rectification circuit, and the other end is connected to the positive terminal of the diode D2, and the connection between the inductor L and the diode D2 and the other output terminal B of the rectification circuit is connected The series circuit of the main switch S1 and the resonant inductance L1, and the circuit connected in parallel with the auxiliary switch S3 and the third capacitor C3 across the two ends of the resonant inductance L1 and then connected in series with the clamping capacitor Cc, and the rectifier at the ne...

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Abstract

The converter includes rectification circuit, inductance, diode and main switch. Main structure of the converter is as following: main switch is connected to first capacitance in parallel, and diode is connected to second capacitance. One end of inductance is connected to output end of rectification circuit, and the other end of inductance is connected positive end of the diode. Cascaded circuit of main switch and resonant inductance is connected between connection point of inductance and diode and another output end of rectification circuit. Cascaded auxiliary switch and clamping capacitance is cross connected on two ends of resonant inductance. Two ends of the said auxiliary switch are connected to third capacitance etc. Features are: simple structure, restraining backward recovery of diode connected in inverted parallel, realization of soft switch and high efficiency of circuit. The converter is applicable to preceding stage of rectifier unit in distribution power source.

Description

technical field [0001] The invention relates to a power factor correction converter, especially a soft-switching single-phase AC-DC power factor correction converter. Background technique [0002] The current single-phase AC-DC power factor correction converter is shown in Figure 1, which includes a rectifier circuit composed of four diodes, an inductor L, a diode D2 and a main switch S1, and one end of the inductor L is connected to the output end of the rectifier circuit , the other end is connected to the positive end of the diode D2, the main switch S1 branch is connected between the junction of the inductor L and the diode D2 and the other output end of the rectification circuit, and the negative end of the diode D2 is connected to the other output end of the rectification circuit Indirect output capacitor Co. This single-phase AC-DC power factor correction converter is applied to the global universal power input, and can realize power factor correction, but the circui...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/14H02M1/42
CPCY02B70/126Y02B70/1491Y02B70/10Y02P80/10
Inventor 冯波徐德鸿
Owner ZHEJIANG UNIV
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