Soft switching power converter circuit

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

Inactive Publication Date: 2007-10-24
ACBEL POLYTECH INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 manufactur

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, characteristics and characteristics of the soft-switching power converter circuit proposed according to the present invention will be described below in conjunction with the accompanying drawings and preferred embodiments. Its effect is described in detail below.

[0048] For a preferred embodiment of the present invention, please refer to Fig. 1, which is a step-up soft-switching power converter circuit. The specific circuit structure is as follows, which includes:

[0049] A bridge rectifier 10, the input end of which is connected to the input power supply 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, and one ...

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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 which can effectively suppress the reverse recovery current of an output rectifier diode and the voltage peak when a power switch is switched. Background technique [0002] Generally, the so-called soft-switching power converter circuit refers to adding inductance and capacitance to the circuit so that the current at the input terminal of the rectifier is close to a sine wave. Commonly used basic circuits generally include step-down, step-up, step-down and step-up, etc., as shown in Figure 17, which reveals a step-up soft-switching power converter circuit, which includes: [0003] A bridge rectifier 70, which has an input terminal and is connected to the input power supply; [0004] A boost inductor L1 is located on the output end of the bridge rectifier 70; [0005] A power switch S1 is connected between the output node of the...

Claims

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Application Information

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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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