A Parallel Resonant Zero Voltage Switching Push-Pull Forward Converter

A zero-voltage switching, push-pull forward excitation technology, applied in the direction of regulating electrical variables, high-efficiency power electronic conversion, converting DC power input to DC power output, etc. The problems of high frequency converter and large switching loss can achieve the effect of convenient control, elimination of voltage spikes, and reduction of voltage and current stress.

Active Publication Date: 2018-07-17
HARBIN INST OF TECH AT WEIHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in practical applications, the traditional push-pull forward works in the hard switching mode, the turn-off voltage peak of the power tube is still not eliminated, the phenomenon of electromagnetic interference is serious, and the switching loss is large, which limits the high frequency of the DC / DC converter

Method used

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  • A Parallel Resonant Zero Voltage Switching Push-Pull Forward Converter
  • A Parallel Resonant Zero Voltage Switching Push-Pull Forward Converter
  • A Parallel Resonant Zero Voltage Switching Push-Pull Forward Converter

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Embodiment Construction

[0037] The present invention is described below based on examples, but the present invention is not limited to these examples. In the following detailed description of the invention, some specific details are set forth in detail. The present invention can be fully understood by those skilled in the art without the description of these detailed parts. In order not to obscure the essence of the present invention, well-known methods, procedures, procedures, components and circuits have not been described in detail. Additionally, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale. Meanwhile, it should be understood that in the following description, "circuit" refers to a conductive loop formed by at least one element or sub-circuit through electrical connection or electromagnetic connection. When an element or circuit is said to be "connected to" another element or an element / c...

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Abstract

The invention discloses a parallel resonant zero-voltage switch push-pull forward converter. The main circuit of the converter includes a primary circuit and a secondary circuit; the primary circuit is provided with a resonant inductor and a parallel resonant capacitor. Through the resonance of the resonant inductance and the parallel resonant capacitor, the zero-voltage switch of the main power transistor in the primary side circuit is realized. The converter can eliminate the voltage peak of the main power tube, improve the EMC effect, increase the boosting capability and conversion efficiency. The circuit of the invention has the advantages of simple structure, convenient control and reliable operation.

Description

technical field [0001] The invention relates to a DC-DC converter, in particular to a parallel resonance type zero voltage switch push-pull forward converter. Background technique [0002] DC-DC converter is currently the most widely used power electronic power conversion circuit, whether it is a space power system or a portable electronic device, it is widely used in various electrical fields. Since different fields have different requirements for the buck-boost capability and power level of the power supply system, and with the development of power electronics technology, people have put forward the power level, power density, conversion efficiency, reliability, and electromagnetic compatibility performance of the power supply. Higher requirements. [0003] There are many existing DC-DC converter topologies, and the push-pull forward circuit is widely used in low-voltage and high-current applications due to its advantages of small input filter size and low power tube shut...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/337H02M1/44
CPCH02M1/44H02M3/3372H02M3/3378H02M1/0058Y02B70/10
Inventor 蔡春伟史春玉孙清洁郭玉兴扬子
Owner HARBIN INST OF TECH AT WEIHAI
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