A Novel Zero-Voltage Switching Full-Bridge DC Converter

A zero-voltage switch and DC converter technology, which is applied in the direction of converting DC power input to DC power output, adjusting electrical variables, and high-efficiency power electronic conversion, etc., can solve the problem of increasing diode voltage stress and output noise, increasing electromagnetic interference, The problem of narrow switching range of the switching tube can improve the conversion efficiency and power density, reduce the loss of duty cycle, and solve the problem of circulating current.

Active Publication Date: 2019-10-15
SHANTOU UNIV
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Problems solved by technology

[0003] However, the traditional full-bridge DC converter mainly has the following significant disadvantages: the zero-voltage switching range of the switching tube is narrow, which leads to serious attenuation of efficiency under light load, increased electromagnetic interference, and reduced reliability; there is circulation loss on the primary side, Increased conduction loss and output filtering requirements; the resonant inductor resonates with the junction capacitance of the rectifier diode, increasing the voltage stress and output noise of the diode

Method used

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  • A Novel Zero-Voltage Switching Full-Bridge DC Converter
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  • A Novel Zero-Voltage Switching Full-Bridge DC Converter

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Embodiment Construction

[0015] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0016] A novel zero-voltage switching full-bridge DC converter according to an embodiment of the present invention includes resistors, filter inductors, first and second capacitors, first to fourth switching tubes, first to sixth rectifier diodes, first and second Two transformers, of which,

[0017] The first switching tube and the third switching tube are connected in parallel to the positive and negative output terminals of the DC power supply after being connected in series, and the second switching tube and the fourth switching tube are also connected in parallel to the positive and negative output terminals of the DC power supply after being connected in series. One end of the primary winding of the second transformer is respectively connected to the connect...

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Abstract

The embodiment of the present invention discloses a novel zero-voltage switching full-bridge direct current converter, and its specific composition includes first to fourth switch tubes, first and second capacitors, first to sixth rectifier diodes, first and second 2. Isolation transformer, which also includes DC power supply, filter inductor and load resistance. This DC converter effectively solves the problems of narrow zero-voltage switching range of switching tube, primary side circulation loss, and rectified voltage oscillation, which are common in existing full-bridge converters. . The invention has the advantages of simple circuit structure, wide soft switching range, low output current ripple, high conversion efficiency and the like.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a novel zero-voltage switching full-bridge DC converter. Background technique [0002] Due to the characteristics of high efficiency, high power density, high reliability, and low cost, power electronic equipment has become an important device for power conversion in modern engineering, and has greatly promoted the development of society and the national economy. After decades of development, power electronic systems are constantly developing in the direction of high efficiency, high power density, and high reliability. In particular, the application of soft switching technology effectively reduces the switching loss and electromagnetic interference of the switching tube, and the converter can work more reliably at high switching frequencies. The full-bridge DC converter can make full use of the parasitic parameters of the device, and can obtain the characteristics of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335
CPCH02M3/33569H02M1/0058Y02B70/10
Inventor 赵雷范衠施羿
Owner SHANTOU UNIV
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