Active clamping stagger parallel connection DC/DC converter having switch capacitor

A switched capacitor and converter technology, which is applied in the field of active clamp interleaved parallel DC/DC converters, can solve the problems of inability to realize the high-gain function of the converter, complex external circuits, and inability to reduce the voltage stress of power switch tubes, etc., to achieve Simple structure, improved circuit efficiency, and less quantity

Inactive Publication Date: 2011-05-18
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • 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 clamping stagger parallel connection DC/DC converter having switch capacitor
  • Active clamping stagger parallel connection DC/DC converter having switch capacitor

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Embodiment Construction

[0009] see figure 1 , the active clamping interleaved parallel DC / DC converter with switched capacitors of the present invention includes two power switch tubes S1, S2, two clamping diodes Dc1, Dc2, two output diodes Do1, Do2, an auxiliary power switch Tube Sc, a clamping capacitor Cc, two switching capacitors Cf1, Cf2, an 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 coupling inductor is connected to one end of the second winding L1b of the first coupling inductor and the positive end of the input power supply, and the other end of the first winding L1a of the first coupling inductor is connected to the first power switch tube The drain of S1 is connected to the source of the auxiliary power switch tube Sc, one end of the first winding L2a of the second coupled inductor is connected to one end of the clamp capacitor Cc a...

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PUM

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Abstract

The invention discloses an active clamping interlaced parallel DC / DC convertor provided with switch capacitors, which comprises two power switch tubes, two output diodes, two clamping diodes, an auxiliary power switch tube, an clamping capacitor, two switch capacitors, an output capacitor and two coupling inductors provided with two windings respectively. By using the second windings of the two coupling inductors and the two switch capacitors, the invention realizes the improvement of the voltage gain of the convertor. By using the auxiliary switch tube and the clamping capacitor to absorb the leakage inductance energy of the two coupling inductors, and using the own parallel capacitors of the two power switch tubes and the gate pole arrangements of the two power switch tubes and the auxiliary switch tube, the convertor realizes the zero voltage turn-on and the zero voltage turn-off of the two power switch tubes and the auxiliary switch tube; and by using the leakage inductances of the two coupling inductors, the convertor realizes the soft turn-off of the two output diodes and the two clamping diodes, and can improve the output gain and circuit efficiency of the convertor withoutenergy loss components in the circuit.

Description

technical field [0001] The invention relates to a DC-DC converter, in particular to an active clamp interleaved parallel DC / DC converter with switched capacitors. 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 reco...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335
Inventor 何湘宁汪东
Owner ZHEJIANG UNIV
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