Single-phase double-boosting bridgeless five-level rectifier based on bidirectional tube plug-in type structure

Abstract

The invention relates to a single-phase double-boosting bridgeless five-level rectifier based on a bidirectional tube plug-in type structure. The single-phase double-boosting bridgeless five-level rectifier based on the bidirectional tube plug-in type structure comprises an alternating current power supply Ug, a double-coupling magnetic winding N1, a double-coupling magnetic winding N2, a capacitor C1, a capacitor C2, switching tubes Q1, Q2, Q3 and Q4, diodes D1, D2, D3 and D8 and a load R. According to the circuit of the single-phase double-boosting bridgeless five-level rectifier based on the bidirectional tube plug-in type structure of the invention, a bridgeless design idea is expanded to the five-level Boost type rectifier, and five levels are realized by adopting different combination modes of the switching tubes; and when a bidirectional tube is in a fault state, the circuit can still realize the power output of a direct current side. The circuit of the rectifier has the advantages of small harmonic content and high anti-electromagnetic interference performance. The voltage stress of the switching tubes is greatly reduced, so that the working reliability of the circuit is improved; power factor correction can be achieved, and reliable load power supply can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of electric energy conversion of power electronics, in particular to a single-phase double-boost bridgeless five-level rectifier based on a bidirectional tube insertion type. Background technique [0002] With the industrialization of modern power electronics technology, the rectification technology has become relatively mature, and the wide application of power electronics devices, especially the harmonic pollution generated by some nonlinear power electronics equipment, reduces the efficiency of transmission, conversion and utilization of electric energy, seriously may cause equipment failure or even damage. [0003] Currently used power factor correction (PFC) technology usually adds a bridge rectifier circuit on the AC input side to achieve AC-DC conversion and reduce harmonic hazards. In the traditional three-level rectifier, with the increase of the power level, the research on the power converter is ...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problems of high harmonic content, poor anti-interference ability and low working reliability in the traditional three-level rectification technology, the present invention proposes a bidirectional tube-inserted single rectifier based on the bridgeless Boost PFC topology. Phase dual-boost bridgeless five-level rectifier, extending the bridgeless design idea to five-level Boost rectifiers, using different combinations of switch tubes to achieve five-level; when the bidirectional tube is in a fault state, the circuit can still be realized Power output on the DC side

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