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Active-clamp high-gain alternation and parallel connection boosting converter

A high-gain, boost-type technology, applied in the direction of converting DC power input to DC power output, instruments, and adjusting electrical variables, etc., can solve the problem of complex external circuits, unable to reduce the voltage stress of power switch tubes, and unable to achieve high gain of converters Function and other issues, to achieve the effect of improving circuit efficiency, simple structure, and low cost

Inactive Publication Date: 2008-08-20
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Although these two methods can realize the soft switching of the power switch tube, the external circuit is complicated, and the voltage stress of the power switch tube cannot be reduced, and the high gain function of the converter cannot be realized.

Method used

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  • Active-clamp high-gain alternation and parallel connection boosting converter

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Embodiment Construction

[0008] see figure 1 , the active clamp high gain interleaved parallel boost converter of the present invention comprises two power switch tubes S1, S2, two clamping diodes Dc1, Dc2, two output diodes Do1, Do2, two auxiliary power switch tubes Sc1, Sc2, two clamping capacitors Cc1, Cc2, two switching capacitors Cf1, Cf2, one output capacitor Co and two coupling inductors, the first coupling inductor has two windings L1a, L1b, the second coupling inductor has two Windings L2a, L2b, one end of the first winding L1a of the first coupled inductor and one end of the first winding L2a of the second coupled inductor are connected to the input power V in The other end of the first winding L1a of the first coupled inductor is connected to one end of the second winding L1b of the first coupled inductor, the drain of the first power switch S1 and the source of the first auxiliary power switch Sc1 The drain of the first auxiliary power switch tube Sc1 is connected to one end of the first ...

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Abstract

An active clamping high-gain alternate parallel voltage boosting convertor disclosed by the invention comprises two power switching diodes, two output diodes, two clamping diodes, two auxiliary power switching diodes, two clamping capacitors, two switching capacitors, an output capacitor and two coupling inductors. Two coupling inductors respectively comprise two windings. The present invention uses the second winding of two coupling inductors and two switching capacitors to realize the high-gain output of the convertor. With the leakage inductance of two coupling inductors, two clamping capacitors, the shunt capacitor existing in two power switching diodes themselves and the gate arrangement of two power switching diodes and two auxiliary power switching diodes, the zero voltage switching-on and zero voltage switching-off of two power switching diodes and two clamping diodes are realized. The soft switching-off of two output diodes and two clamping diodes are realized with the leakage inductance of two coupling inductors, and the circuit does not include energy losing element and the output gain of the convertor and the circuit efficiency can be increased.

Description

technical field [0001] The invention relates to a DC-DC converter, in particular to an active-clamp high-gain interleaved parallel boost converter. Background technique [0002] A conventional step-up (Boost) interleaved parallel DC-DC converter includes two inductors, two freewheeling diodes, two power switch tubes, the drain of the first power switch tube and the anode of the first diode and One end of the first inductance is connected, the drain of the second power switch tube is connected with the anode of the second diode and one end of the second inductance, and the other end of the first inductance is connected with the other end of the second inductance. The output voltage gain of this step-up interleaved parallel DC-DC converter is small, the voltage stress of the power switch tube is large, the power switch tube works as a hard switch, the switching loss is large, and the reverse recovery current of the freewheeling diode is large , the reverse recovery loss is la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/155
Inventor 何湘宁汪东
Owner ZHEJIANG UNIV
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