DC zero-voltage switched full-bridged converter of diode mutual inductor clamp

A technology of current transformer and zero voltage switch, applied in the direction of converting DC power input to DC power output, high-efficiency power electronic conversion, adjusting electrical variables, etc. , the effect of eliminating voltage spikes and eliminating losses

Inactive Publication Date: 2008-12-31
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The two clamping diodes are turned on alternately in one switching cycle. If the clamping diodes are not turned off fast enough, it is easy to pass through and cause damage to the clamping diodes.

Method used

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  • DC zero-voltage switched full-bridged converter of diode mutual inductor clamp
  • DC zero-voltage switched full-bridged converter of diode mutual inductor clamp
  • DC zero-voltage switched full-bridged converter of diode mutual inductor clamp

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Embodiment Construction

[0011] attached figure 1 And attached figure 2 Shown are two schematic diagrams of the circuit structure of the zero-voltage switching full-bridge DC converter with the auxiliary winding of the transformer. by the DC power supply V in , two inverter bridge arms 1 and 2, resonant inductor 3, clamp circuit 4, isolation transformer 5, rectification and filter circuit 6, current transformer 7, current transformer rectification circuit 8 and auxiliary control power supply voltage V c composition. Q 1 ~Q 4 are four main switch tubes, D 1 ~D 4 are the switching tube Q 1 ~Q 4 body diode, C 1 ~C 4 respectively switch Q 1 ~Q 4 The parasitic capacitance, L r is the resonant inductance, T r is the isolation transformer, D 5 、D 6 is the clamping diode, D R1 and D R2 is the output rectifier diode, L f is the output filter inductor, C f is the output filter capacitor, R Ld is the load, T s is the current transformer, D R3 ~D R6 is the current transformer output recti...

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PUM

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Abstract

The invention is concerned with zero-voltage-switching full bridge DC converter to clamp diode with current transformer. It belongs to DC converter and relates to DC power supply Vin, two invert bridge legs, resonant inductance, clamp circuit, transformer, rectifier and filtering circuit, current transformers, rectifier circuit of current transformers and DC power supply Vc. The clamp diode circuit eliminates voltage surge, pinnacle and the wastage arose by the inverted renew to the output rectifying tube, reduces the voltage stress of the output rectifying tube. The current transformer quickly reduces the current and improves the work condition of clamp diode.

Description

1. Technical field [0001] The zero-voltage switching full-bridge direct-current converter clamped by a diode plus a current transformer of the invention belongs to the direct-current 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 le...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335
CPCY02B70/10
Inventor 陈乾宏殷兰兰彭勃王健
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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