Soft switching phase-shift full bridge circuit

A full-bridge circuit and phase-shifting technology, which is applied in the field of phase-shifting full-bridge circuits, can solve problems such as short circuit, difficult zero-voltage switching, and incomplete improvement of the reverse recovery of rectifier diodes on the secondary side of transformer 70.
CN100481694CInactive Publication Date: 2009-04-22ACBEL POLYTECH INC
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Patent Information

Authority / Receiving Office
CN Ā· China
Patent Type
Patents(China)
Current Assignee / Owner
ACBEL POLYTECH INC
Publication Date
2009-04-22
Estimated Expiration
Not applicable Ā· inactive patent

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Abstract

The disclosed phase-shift full bridge circuit for flexible switch comprises: a transformer, a lead / lag bridge arm connected with one / another end of the primary side of transformer, an auxiliary bridge arm connected with power end, a break capacitor between primary side of transformer and the lead arm, and an output circuit set on secondary side of the transformer. This invention makes both the lead and lag arm fit to zero voltage switch, and turns off the rectifying diode with zero voltage.
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Description

technical field

[0001] The invention relates to a soft-switched phase-shifting full-bridge circuit, in particular to a soft-switching that enables both the leading bridge arm and the lagging bridge arm to easily realize zero-voltage switching, and effectively solves the reverse recovery problem of the output rectifier diode phase-shifted full-bridge circuit. Background technique

[0002] see Figure 19 As shown, it is a kind of existing phase-shifting full-bridge circuit, which includes: a transformer 70; It is connected to one end of the primary side of the transformer 70; a lagging bridge arm 72 is composed of two transistors M3 and M4, and the connection node of the two transistors M3 and M4 is connected to the other end of the primary side of the transformer 70; a resonant inductor Ls is connected in series between the connection nodes of the two transistors M1 and M2 in the leading bridge arm 71 and the primary side of the transformer 70; an output circuit 73 is locate...

Claims

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