A Full Bridge llc Resonant Converter with Double Fault Tolerance
A resonant converter, full-bridge technology, applied in the direction of high-efficiency power electronic conversion, output power conversion device, DC power input conversion to DC power output, etc., can solve the problem of increasing device cost and switching tube current on the primary side of the converter Stress increase, inconvenient circuit parameter design and other problems, to achieve the effect of simplifying device selection, simplifying control strategy, and avoiding electromagnetic interference problems
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[0033] In order to describe the present invention more specifically, the technical solutions and related working principles of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0034] A full-bridge LLC resonant converter with double fault tolerance, including two full-bridge LLC resonant circuits and two auxiliary diodes; the primary side of the full-bridge LLC resonant circuit is a full-bridge circuit structure, and the secondary side is a full-wave rectifier circuit structure; the auxiliary diode is a power diode.
[0035] like figure 1 As shown, the primary side circuit includes:
[0036] 1) The first primary side branch connected in parallel with the input power supply is composed of an antiparallel diode D S1 The first power switch S 1 , with antiparallel diode D S2 The second power switch S 2 , the first snubber capacitor C S1 , the second snubber capacitor C S2 , the first fuse F 1 C...
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