Anpc-dab converter, modulation method and system using hybrid power device

Abstract

The invention discloses an ANPC-DAB converter adopting a hybrid power device, a modulation method and a system, and belongs to the field of power electronics. Including: a hybrid power device optimized phase-shift controller, a DAB current optimized controller, a transformer, and a primary-side active bridge circuit and a secondary-side active bridge circuit respectively connected to both sides of the transformer; the primary-side active bridge circuit or The secondary side active bridge circuit includes at least one half-bridge ANPC three-level circuit, and the half-bridge ANPC three-level circuit includes six switch tubes Q 1 ~Q 6 , each switching tube is connected in antiparallel with a diode D 1 ~D 6 ; among them, Q 2 with Q 3 It is a SiC power device, and the rest are Si power devices. When the half-bridge ANPC three-level circuit switches between different states, the hard turn-off, hard turn-on and diode reverse recovery during the switching process all occur on the SiC device, realizing a high-efficiency DAB in the full power range.

Description

technical field [0001] The invention relates to the field of power electronics, and more particularly, to an ANPC-DAB converter using a hybrid power device, a modulation method and a system. Background technique [0002] SiC devices have become an effective way to improve the performance and efficiency of high-voltage and high-power power electronic converters. However, the cost of SiC devices is still high at present. The mixed circuit of power devices mainly uses the excellent low switching loss performance of wide bandgap devices to improve the efficiency of the overall circuit. Among them, the mixed use of SiC and Si power devices has become effective in the field of high-voltage and high-power AC / DC three-level conversion circuits. There are three main research ideas for improving efficiency. One is to use SiC MOSFET devices in parallel with Si IGBT devices, so that SiC devices work in hard switching and Si devices work in soft switching. The main disadvantages are the...

AI Technical Summary

Problems solved by technology

[0007] For the defects of the prior art, the object of the present invention is to provide a kind of ANPC-DAB converter, modulation method and system using hybrid power devices, aiming at expensive wide bandgap switching devices, such as SiC devices, etc., which cause multiple The problem of high cost of level DAB, achieve high performance and efficiency at a lower cost, and achieve cost-effective DAB

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