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Improved type phase shift full-bridge converter circuit

A phase-shifting full-bridge and converter technology, applied in the field of improved phase-shifting full-bridge converter circuits, can solve the problems of increasing device voltage stress and output voltage ripple, increasing conduction loss, and increasing electromagnetic interference, etc. Circulation problems, the effect of reducing oscillations

Inactive Publication Date: 2017-09-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional phase-shifted full-bridge soft-switching converter still has some problems. First, the converter cannot realize the ZVS characteristics of the system under light load conditions, resulting in reduced system efficiency and higher electromagnetic interference
Second, the parasitic oscillation in the rectification process of the converter increases the voltage stress of the device and the output voltage ripple
Third, during the freewheeling period of the converter, the conduction loss also increases significantly

Method used

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  • Improved type phase shift full-bridge converter circuit
  • Improved type phase shift full-bridge converter circuit
  • Improved type phase shift full-bridge converter circuit

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Embodiment Construction

[0015] Embodiments of the present invention patents are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, and are only used to explain the patent of the present invention, and cannot be construed as limiting the patent of the present invention. All modifications made according to the spirit of the main technical solutions of the present invention shall fall within the protection scope of the present invention.

[0016] Below in conjunction with accompanying drawing, the technical scheme of the patent of the present invention is described in further detail:

[0017] An improved phase-shifting full-bridge converter circuit, comprising first to fourth MOSFETs, first and second transformers, first to third capacitors, first to fourth diodes...

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Abstract

The invention discloses an improved type phase shift full-bridge converter circuit including first to fourth MOSFETs, first and second transformers, first to third capacitors, first to fourth diodes, a resistor, and an inductor. The improved type phase shift full-bridge converter circuit can be applied to various phase shift full-bridge converters, a switch tube is additionally arranged to realize the soft switching range, during the whole switching period, the primary power is maintained to be transmitted to the secondary side, the rectifier bridge parasitic oscillation can be substantially suppressed, the output voltage ripple is reduced, and the efficiency of the converters is improved.

Description

technical field [0001] The patent of the invention discloses an improved phase-shifting full-bridge converter circuit, which relates to the technical field of power electronics. Background technique [0002] With the development of power electronics technology, the performance of switching power supply is also improving. In order to realize the development trend of high frequency, miniaturization and digitalization of power supply, soft switching technology has been widely used in the field of switching power supply, and has become a very important research direction in the field of power electronics. [0003] The traditional phase-shifted full-bridge soft-switching converter has the advantages of simple structure, low loss, convenient control, and stable performance, which makes the phase-shifted full-bridge converter very suitable for medium and high power applications. However, there are still some problems in the traditional phase-shifted full-bridge soft-switching conv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02M1/14
CPCH02M1/14H02M3/33507H02M3/33569H02M1/0058Y02B70/10
Inventor 李浩昱赵雷许传宇
Owner HARBIN INST OF TECH
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