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Soft switching power converter circuit

A power converter and soft switching technology, applied in output power conversion devices, high-efficiency power electronic conversion, conversion equipment without intermediate conversion to AC, etc., can solve the problems of general products without structure and inconvenience

Inactive Publication Date: 2009-02-04
ACBEL POLYTECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] It can be seen that the above-mentioned existing soft-switching power converter circuit obviously still has inconvenience and defects in structure and use, and needs to be further improved urgently.
In order to solve the above-mentioned problems, the relevant manufacturers have tried their best to find a solution, but no suitable design has been developed for a long time, and the general products do not have a suitable structure to solve the above-mentioned problems. This is obviously related. The problem that the industry is eager to solve

Method used

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Embodiment Construction

[0047] In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, the specific implementation, structure, features and characteristics of the soft-switching power converter circuit proposed in accordance with the present invention will be described below in conjunction with the accompanying drawings and preferred embodiments. Its efficacy is described in detail later.

[0048] For a preferred embodiment of the present invention, please refer to figure 1 As shown, it is a boost-type soft-switching power converter circuit. The specific circuit structure is detailed as follows, which includes:

[0049] A bridge rectifier 10, the input end of which is connected to the input power Vin;

[0050] A boost inductor L1, one end of which is connected to the output end of the bridge rectifier 10;

[0051] A power switch S1, which can be composed of a power transistor such as a metal oxide half field effect transistor...

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Abstract

The disclosed soft-switch power converter circuit comprises: a power switch, an output rectifying diode connecting with former switch, and a buffer circuit between last two parts, wherein the rectifying diode comprises: a first / second buffer diode serial connecting between the switch and output end, a buffer inductor between the output diode and output end to inhibit the reverse recovery current, a first buffer capacitor set between former two connecting nodes, and a second buffer capacitor paralleled between two ends of the first buffer diode to inhibit the voltage peak during switching. This invention simplifies the entire structure.

Description

Technical field [0001] The invention relates to a soft-switching power converter circuit, in particular to a soft-switching power converter circuit that can effectively suppress the reverse recovery current of the output rectifier diode and the voltage spike during power switch switching. Background technique [0002] The so-called soft-switching power converter circuit generally refers to adding inductors and capacitors to the circuit to make the current at the input end of the rectifier close to a sine wave. The commonly used basic circuits generally include buck, boost, and buck-boost, etc. As shown in Figure 17, a boost-type soft-switching power converter circuit is disclosed, which includes: [0003] A bridge rectifier 70, which has an input terminal, which is connected to an input power source; [0004] A boost inductor L1 is provided on the output end of the bridge rectifier 70; [0005] A power switch S1 is connected between the output node of the output inductor L1 and t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/14H02M3/04
CPCY02B70/1491Y02B70/10
Inventor 马皓吴军蔚马小林
Owner ACBEL POLYTECH INC
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