Parallel resonant zero voltage switch push-pull forward converter

A zero-voltage switch, push-pull forward technology, applied in the direction of adjusting electrical variables, high-efficiency power electronic conversion, DC power input conversion to DC power output, etc., can solve the problem that the power tube shutdown voltage peak is not eliminated and limits DC/DC Converter high frequency, large switching loss and other problems, to achieve the effect of convenient control, eliminate voltage spikes, reduce voltage and current stress

Active Publication Date: 2016-10-26
HARBIN INST OF TECH AT WEIHAI
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  • 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 no

Method used

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  • Parallel resonant zero voltage switch push-pull forward converter
  • Parallel resonant zero voltage switch push-pull forward converter
  • Parallel resonant zero voltage switch push-pull forward converter

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[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 present invention, some specific details are described in detail. Those skilled in the art can fully understand the present invention without the description of these details. In order to avoid obscuring the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail. In addition, those of ordinary skill in the art should understand that the drawings provided herein are for illustrative purposes, and the drawings are not necessarily drawn to scale. At the same time, 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 or electromagnetic connection. When an element or circuit is referred to as being "connected to" another element or ...

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Abstract

The invention discloses a parallel resonant zero voltage switch push-pull forward converter. The main circuit of the converter comprises a primary circuit and a secondary circuit. The primary circuit is internally provided with a resonant inductor and a parallel resonant capacitor. Through the resonance of the resonant inductor and the parallel resonant capacitor, the zero voltage switching of a main power tube in the primary circuit is realized. According to the converter, the voltage spike of the main power tube can be reduced, an EMC effect is improved, and the voltage boost ability and conversion efficiency are improved. The parallel resonant zero voltage switch push-pull forward converter has the advantages of a simple circuit structure, convenient control and reliable working.

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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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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