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Improved phase-shifted full-bridge converter circuit

A phase-shifting full-bridge and converter technology, which is applied in the field of improved phase-shifting full-bridge converter circuit, can solve the problems of increasing device voltage stress and output voltage ripple, increasing conduction loss, and difficult to meet conditions, etc., to reduce Requirements, weakening of oscillations, effects of solving circulation problems

Inactive Publication Date: 2017-11-21
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still some problems in the traditional phase-shifted full-bridge converter, the current stress and voltage stress of the switching devices are the same as those of the hard-switching PWM converter
Its zero-voltage turn-on condition is affected by the load current, and the condition is difficult to meet at light load, resulting in reduced system efficiency and increased electromagnetic interference
The parasitic oscillation in its rectification process increases the voltage stress and output voltage ripple of the device, and the conduction loss also increases significantly

Method used

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  • Improved phase-shifted full-bridge converter circuit
  • Improved phase-shifted full-bridge converter circuit
  • Improved phase-shifted full-bridge converter circuit

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Embodiment Construction

[0014] 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.

[0015] Below in conjunction with accompanying drawing, the technical scheme of the patent of the present invention is described in further detail:

[0016] An improved phase-shifting full-bridge converter circuit, comprising first to fourth MOSFETs, first and second transformers, first and second capacitors, first to fourth diod...

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Abstract

The invention discloses an improved phase-shifted full-bridge converter circuit, including first to fourth MOSFETs, a first transformer, a second transformer, a first capacitor, a second capacitor, first to fourth diodes, a resistor and an inductor. The circuit provided by the invention can be applied to various phase-shifted full-bridge converters, realizes a wide soft switch working range of a switching tube, realizes continuity of transmission of primary side power to a secondary side in a whole switching period at the same time, and effectively reduces inductive current ripples and oscillation of a rectified voltage.

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] Soft switching technology is one of the important technologies to make the power converter high-frequency. Its main feature is to make the current (or voltage) in the switching device change according to the sinusoidal or quasi-sinusoidal law. When the current naturally crosses zero, the device is turned off. off (or turn on the device when the voltage is zero) to reduce switching losses. Soft switching technology can not only solve the problems of hard switching loss, capacitive turn-on, inductive turn-off and diode reverse recovery in hard switching converters, but also solve the problems of EMI caused by hard switching. [0003] The traditional phase-shifted full-bridge converter uses the resonance between the leakage inductance of the transformer or the primary side...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335
CPCH02M3/33569H02M1/0058Y02B70/10
Inventor 李浩昱赵雷李振伟
Owner HARBIN INST OF TECH
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