Isolated DC transducer of side edge clamp

A technology of DC converter and isolation transformer, which is applied in the direction of converting DC power input to DC power output, output power conversion equipment, and conversion equipment with intermediate conversion to AC, which can solve the problems of clamping diode damage and easy direct connection. , to achieve the effect of eliminating loss, eliminating influence, eliminating voltage oscillation and voltage spike
CN101005240AInactive Publication Date: 2007-07-25NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Publication Date
2007-07-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

The DC convertor is composed of DC power supply, first inversion bridge arm, second bridge arm, resonant inductance, isolating transformer, rectifying and filtering circuit, current transformer, and clipper circuit. The added current transformer and clipper circuit eliminates voltage surge and voltage pike caused by backward recovery of rectifying tube, reduces voltage stress of rectifying tube, and eliminates waste caused by backward recovery of rectifying tube. Since voltage stress of clamp diode is smaller, tube with good capability can be selected to eliminate influence on circuit caused by stray parameter of clamp diode. Moreover, Comparing with mode that a clamp diode is placed at primary side of transformer to clip voltage at primary side, the clipper circuit clips voltage at secondary side of transformer in the invention can eliminate voltage surge and voltage pike of rectifier diode caused by leakage inductance of transformer.
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Description

1. Technical field

[0001] The isolated DC converter with secondary side clamping of the present invention belongs to the DC converter of an electric energy conversion device. 2. Background technology

[0002] In medium and high power DC conversion occasions, the full bridge converter has been widely used because the switching tube is easy to realize soft switching and adopts constant frequency control. In the past two decades, there have been many soft-switching control strategies and circuit topologies for full-bridge converters. Both the phase-shift control zero-voltage switching full-bridge converter and the phase-shift control zero-voltage zero-current switching full-bridge converter can realize the soft switching of the switching tube. However, whether it is a zero-voltage switching or zero-voltage zero-current switching full-bridge converter, due to the reverse recovery of the secondary rectifier diode, the leakage inductance of the transformer (or the additional reso...

Claims

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