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Magnetic-integrated zero-voltage zero-current soft switch full bridge circuit

A zero-voltage, zero-current, full-bridge circuit technology, applied in the field of magnetic integration, can solve the problems of reducing power density, affecting the efficiency of power supply devices, increasing circuit volume, loss and cost, and reducing magnetic loss and switching loss. Theoretical research and practical value, the effect of improving efficiency and power density

Inactive Publication Date: 2009-01-28
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Too many magnetic components will increase the volume, loss and cost of the circuit, reduce the power density, and affect the efficiency of the power supply device

Method used

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  • Magnetic-integrated zero-voltage zero-current soft switch full bridge circuit
  • Magnetic-integrated zero-voltage zero-current soft switch full bridge circuit
  • Magnetic-integrated zero-voltage zero-current soft switch full bridge circuit

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Experimental program
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Embodiment Construction

[0021] Such as figure 1 As shown, the magnetically integrated zero-voltage zero-current soft-switching full-bridge circuit includes an inverter, a magnetically integrated network, a rectifier, and an output filter capacitor. The inverter circuit includes a first main switching device, a second main switching device, The third main switching device and the fourth main switching device; the source of the first main switching device is connected to the drain of the second main switching device as port A, the source of the third main switching device is connected to the fourth main switching device As port B, the drain of the first main switching device is connected to the drain of the third main switching device, and is connected to the anode of the input signal Vin, and the source of the second main switching device is connected to the first The source poles of the four main switching devices are connected and connected with the negative pole of the input signal Vin; the rectifi...

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PUM

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Abstract

The present invention relates to a magnetically integrated zero voltage zero current soft-switching full-bridge circuit. The circuit is characterized in that the circuit comprises an inverter, a magnetically integrated network, a rectifier, and an output filter capacitor (Co).The magnetically integrated network integrates a transformer function, an energy storage inductor function and an auxiliary inductor function for realizing soft-switching in a magnetic element. The magnetically integrated network also has various topology variation types to meet the requirements of different application occasions. The whole converter has only one magnetic element so that the number of the magnetic elements is largely reduced and the power density is improved. Furthermore, the zero voltage cutover of all primary switch tubes is realized by using exciting current without an additional auxiliary soft-switching network. A commutation diode at the secondary side can realize the zero current switching. The switching loss is largely reduced, and the switching frequency is improved. The circuit can adopt the phase-shifting control, and also can adopt the unsymmetrical PUM control, thereby having good theoretical research value and use value.

Description

technical field [0001] The invention belongs to the technical field of magnetic integration, and in particular relates to a magnetically integrated zero-voltage and zero-current soft-switching full-bridge circuit. Background technique [0002] Usually, the volume of the converter is mainly limited by the magnetic components, including transformers, inductors, etc. At the same time, the volume and number of magnetic components will also affect the cost and efficiency of the converter. In recent years, with the proposal and application of magnetic integration technology, the volume and number of magnetic components in the circuit have been optimized, thereby reducing costs and losses. The use of soft switching technology can reduce switching loss, improve efficiency, reduce EMI, and realize zero-voltage switching (ZVS) in a general full-bridge circuit (US. Patent No. 6862195 B2, OnMar. 1, 2005). In the phase-shifted full-bridge circuit, in order to make the switching devices...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02M1/36
CPCY02B70/1491Y02B70/10
Inventor 吴新科孟培培钱照明
Owner ZHEJIANG UNIV
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