A push-pull llc resonant converter with anti-shoot-through soft switching

A resonant converter and anti-shoot-through technology, which is applied in the direction of converting DC power input to DC power output, instruments, and adjusting electrical variables, can solve problems such as bridge arm cut-through, and achieve the effects of increasing power density, eliminating hidden dangers, and reducing costs.

Active Publication Date: 2017-08-11
XINXIANG TAIHANG JIAXIN ELECTRIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional LLC resonant converter primary side switch tube has the hidden danger of bridge arm through-through, which is not suitable for applications in aerospace, military and other fields with high reliability requirements.

Method used

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  • A push-pull llc resonant converter with anti-shoot-through soft switching
  • A push-pull llc resonant converter with anti-shoot-through soft switching
  • A push-pull llc resonant converter with anti-shoot-through soft switching

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Embodiment Construction

[0024] specific implementation plan

[0025] The present invention will be further described below in conjunction with accompanying drawing.

[0026] Such asfigure 1 As shown, an anti-shoot-through soft-switching push-pull LLC resonant converter of the present invention is composed of an input source V in , a primary circuit, an LLC resonant network, a transformer, and a secondary circuit. The primary circuit is composed of a buffer capacitor and a switch tube connected in series to form an anti-shoot-through circuit. The secondary circuit is composed of a rectifier circuit. The LLC resonant network and The transformer is composed of high frequency transformer, resonant inductor L r , Exciting inductance L m and resonant capacitor C r constitute;

[0027] The primary side circuit includes a first switch tube S 1 , the second switch tube S 2 , the first buffer capacitor C 1 , the second buffer capacitor C 2 ; The first switch tube S 1 source of the first snubber capaci...

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Abstract

The invention discloses an anti-conduction-through soft switch push-pull LLC resonance converter. The anti-conduction-through soft switch push-pull LLC resonance converter is composed of an input source Vin, a primary circuit, an LLC resonance network and transformer, and a secondary circuit. The primary circuit is composed of an anti-conduction-through circuit formed by connecting a buffer capacitor with a switch tube in series, the secondary circuit is composed of a rectification circuit, the LLC resonance network and transformer is composed of a high-frequency transformer, a resonance inductor Lr, an excitation inductor Lm and a resonance capacitor Cr. According to the invention, through integrating an LLC resonance structure with an anti-conduction-through leg and a push-pull structure, a primary anti-conduction-through structure is realized, soft switching of a primary switch tube and soft switching of a secondary rectification tube are simultaneously realized, and the reliability and the power density of a power converter are improved. According to the invention, there are only two switch tubes so that the cost is decreased effectively. The converter is applied to aerospace and military fields with high reliability requirements and can be applied to occasions with high input voltages.

Description

technical field [0001] The invention relates to the field of power electronic converters for systems such as communication power supplies, aerospace high-reliability power supplies, and hybrid electric vehicles, and in particular to an anti-shoot-through soft-switching push-pull LLC resonant converter. Background technique [0002] Switching power supplies are widely used in various fields of national production. The continuous development of aerospace and military fields has put forward higher requirements for the development of high reliability, high power density, high efficiency, and high-power power converters. [0003] The push-pull structure can realize the bidirectional magnetization of the converter and there is no hidden danger of bridge arm through-passing. It is widely used in the design of aerospace power supplies and is one of the basic programs of aerospace power supply topology. However, the voltage stress of the switch tube of the push-pull structure is twic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/337
CPCY02B70/10
Inventor 赵清林范满义杨秋霞李晓菊
Owner XINXIANG TAIHANG JIAXIN ELECTRIC TECH CO LTD
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