Transformer clamping zero voltage switch three level full bridge converter and its expansion circuit

A technology of full-bridge converter and transformer, which is applied in high-efficiency power electronic conversion, conversion equipment without intermediate conversion to AC, climate sustainability, etc., and can solve the problems of expensive switching tubes and other issues

Inactive Publication Date: 2004-12-29
HEFEI TONGZHI ELECTRICAL CONTROL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A typical step-down solution is a full-bridge circuit, but a switch tube with a large capacity that can handle 1700V input must choose a switch tube with a withstand voltage of 3300V, which is very expensive

Method used

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  • Transformer clamping zero voltage switch three level full bridge converter and its expansion circuit
  • Transformer clamping zero voltage switch three level full bridge converter and its expansion circuit
  • Transformer clamping zero voltage switch three level full bridge converter and its expansion circuit

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Embodiment Construction

[0019] Depend on image 3 It can be seen that the specific composition of the present invention is that the output of the DC voltage 1 is connected to the input voltage dividing capacitor 2 and the switch tube chopper circuit 3, and its output is connected to the primary side of the transformer of the transformer isolation circuit 4, and the output of the transformer isolation circuit 4 passes through the diode The rectifier circuit and the inductance-capacitance filter circuit 5 are finally connected to the DC voltage output circuit 6 . Depend on figure 1 , figure 2 , image 3It can be seen that the inventive point of the present invention lies in the switching tube chopper circuit 3 and the transformer isolation circuit 4, wherein the specific composition of the switching tube chopper circuit 3 is the four switching tubes Q of the 1st, 3rd, 5th and 7th 1 , Q 3 , Q 5 , Q 7 The positive and negative ends of the positive series are connected in parallel to the two voltag...

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Abstract

A transformer clamping zero voltage switch three level full bridge converter comprises a D.C. voltage and input dividing potential drop capacitor, a switching tube chopper circuit, a transformer isolating circuit, a filtering circuit and a DC voltage follower circuit, wherein the switching tube chopper circuit forms a front bridge arm through four switching tubes and a lagging bridge arm through the other four switching tubes, thus realizing the voltage stress of the switching tubes at half of the input voltage.

Description

technical field [0001] The transformer clamp zero-voltage switching three-level full-bridge converter and its expansion circuit of the present invention belong to the direct / direct converter of the power electronic system. Background technique [0002] In today's society, electricity is closely related to people's lives, and electrical equipment can be seen everywhere. Among many electrical equipment, power supply is an indispensable part. The power supply required by general electrical equipment can be divided into two types: one is AC power supply and the other is DC power supply. AC power can be obtained directly from the AC power supply grid, or obtained by transforming the AC power in the grid through a transformer, or converted from DC power to AC power through an inverter, and so on. The easiest way to obtain direct current is to rectify the alternating current and filter it into direct current. However, in order to obtain stable and reliable direct current, a conver...

Claims

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Application Information

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IPC IPC(8): H02M3/06
CPCY02B70/1491Y02B70/10
Inventor 丁志刚胡育文
Owner HEFEI TONGZHI ELECTRICAL CONTROL TECH
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