Active clamping stagger parallel connection voltage boosting-type converter

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

Active Publication Date: 2009-10-21
ZHEJIANG UNIV
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  • 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 voltage boosting-type converter

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Embodiment Construction

[0009] see figure 1 , the active clamp interleaved parallel boost converter of the present invention includes two power switch tubes S1, S2, two freewheeling diodes Do1, Do2, an auxiliary power switch tube Sc, a clamping capacitor Cc, and an output capacitor Co and two coupled inductors, the first coupled inductor has three windings L1a, L1b, L1c, the second coupled inductor has three windings L2a, L2b, L2c, the drain of the first power switch S1 and the first coupled inductor One end of the winding L1a is connected, the source of the first power switch tube S1 is grounded, the other 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, and the second The source of the power switch tube S2 is connected to one end of the first winding L2a of the second coupled inductor, and the drain of the second power switch tube S2 is connected to one end of the second wi...

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PUM

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Abstract

The invention discloses an interleaving active-clamping boosting converter which comprises two power switching tubes, two fly-wheel diodes, an auxiliary power switching tube, a clamping capacitor, an output capacitor and two coupled inductors, each provided with three windings. The boosting converter makes use of the third windings of the two coupled inductors to realize voltage gain of the converter, and employs a circuit constituted by the auxiliary power switching tube and the clamping capacitor which are connected in series to totally absorb and transfer the leakage inductance energy of the two coupled inductors and to realize no-voltage conduction on the two power switching tubes; no-voltage shutoff on the two power switching tubes is realized through the parallel capacitors of the two power switching tubes; the boosting converter realizes no-voltage conduction and no-voltage shutoff on the auxiliary power switching tube through the gate arrangement of the two power switching tubes and the auxiliary power switching tube. The boosting converter is simple in structure and has fewer assistant elements and no energy-consuming elements, which can improve the output gain of the converter and the efficiency of the circuit.

Description

technical field [0001] The invention relates to a DC-DC converter, in particular to an active clamp 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 large. In r...

Claims

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Application Information

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