Soft-switching high-power Vienna rectifier topological structure

Abstract

The invention relates to a soft-switching high-power Vienna rectifier topological structure which is composed of a Vienna rectifier and two auxiliary circuits. The Vienna rectifier is composed of two rectifier diodes, two direct-current link capacitors and two main switches. Each auxiliary circuit is connected with a branch circuit where two rectification diodes in the Vienna rectifier are located and used for creating soft switching conditions for the main switches and the rectification diodes of the Vienna rectifier; and the two auxiliary circuits are the same in structure, and each auxiliary circuit is formed by a resonant inductor, a transformer, an auxiliary switch and two blocking diodes. Compared with the prior art, the topological structure has the advantages of soft switching, high power, zero-voltage switching conduction and the like.

Description

technical field [0001] The invention relates to the technical field of circuit topology, in particular to a soft-switching high-power Vienna rectifier topology. Background technique [0002] In the current state of the art, there are many circuit topologies that employ active and passive snubber circuits to create soft switching conditions for semiconductor devices and rectifier diodes. Create soft switching conditions, existing literature R.Streit and D.Tollik,"High efficiencytelecom rectifier using a novel soft-switched boost-based input currentshaper,"[Proceedings]Thirteenth International Telecommunications EnergyConference-INTELEC 91,Kyoto,Japan,1991, pp.720-726, doi:10.1109 / INTLEC.1991.172474. proposes a converter circuit using an active snubber circuit with reduced current and voltage stress in addition to soft switching of the switch on and the rectifier off, However, the auxiliary switches of active snubber circuits have high current stress and operate under hard sw...

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Problems solved by technology

[0002] In the current state of the art, there are many circuit topologies that employ active and passive snubber circuits to create soft switching conditions for semiconductor devices and rectifier diodes. Create soft switching conditions, existing literature R.Streit and D.Tollik,"High efficiencytelecom rectifier using a novel soft-switched boost-based input currentshaper,"[Proceedings]Thirteenth International Telecommunications EnergyConference-INTELEC 91,Kyoto,Japan,1991, pp.720-726, doi:10.1109 / INTLEC.1991.172474. proposes a converter circuit using an active snubber circuit with reduced current and voltage stress in addition to soft switching of the switch on and the rectifier off, However, the auxiliary switches of active snubber circuits have higher current stress and operate under hard switching conditions

[0003] Boost In the topology, both the main switch and the auxiliary switch operate under soft switching conditions, however, the voltage stress of the main switch is much higher, which needs to be controlled by proper selection of snubber inductance value and switching frequency, in addition, the gate drive circuit requires complex , Expensive and difficult to control

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