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Hybrid-Mode Adaptive Zero-Voltage Switching for Single-Phase DC-AC Conversion with Paralleled SiC MOSFETs

Published version
Peer-reviewed

Repository DOI


Type

Article

Change log

Authors

Jiang, Y 
Shen, Y 
Shillaber, L 
Jiang, C 

Abstract

State-of-the-art soft-switching modulations such as critical conduction mode (CrM) and Triangular Current Mode (TCM) increase the conduction loss of power semiconductors and require variable switching frequencies, thus these soft-switching methods are seldom used in high-power DC-AC conversion. To achieve soft-switching while maintaining low RMS currents, this article proposes a Hybrid Quadrilateral and Continuous Current Mode (HQCCM) modulation for general high-frequency single-phase DC-AC conversion based on paralleled SiC MOSFETs. The proposed HQCCM adaptively operates in soft-switching Quadrilateral Current Mode (QCM) or hard-switching Continuous Conduction Mode (CCM) in one AC line cycle depending on the instantaneous AC load current. Thus, high efficiencies can be achieved over the full power range. This HQCCM modulation features adaptive soft-switching, constant switching frequency, compatibility to line filter and is applicable for high-power applications. A 4.4-kW single-phase DC-AC inverter is developed and tested to verify the advantages of the HQCCM. This article is accompanied by a video demonstrating the effectiveness of the proposed HQCCM in varying load scenarios.

Description

Keywords

Continuous conduction mode (CCM), parallel metal oxide semiconductor field-effect transistor (MOSFETs), quadrilateral current mode (QCM), single-phase inverter, softswitching

Journal Title

IEEE Transactions on Power Electronics

Conference Name

Journal ISSN

0885-8993
1941-0107

Volume Title

37

Publisher

Institute of Electrical and Electronics Engineers (IEEE)
Sponsorship
EPSRC (EP/T02030X/1)