Reverse power flow study of an isolated Quasi-Switched-Capacitor DC/DC converter for automotive applications

Author

Xuan Zhang ; Chengcheng Yao ; Feng Guo ; Jin Wang

Author_Institution

Dept. of Electr. & Comput. Eng., Ohio State Univ., Columbus, OH, USA

fYear

2013

fDate

4-7 Aug. 2013

Firstpage

41

Lastpage

44

Abstract

This paper presents the study of the reverse power flow of an isolated Quasi-Switched-Capacitor (QSC) DC/DC converter for automotive applications. The converter employs a QSC DC/AC front-stage circuit with a 3:1 voltage step-down ratio, and a synchronous-rectifying-current-doubler post-stage circuit. The reverse power flow is delivered from the 14 V dc bus to the high voltage (HV) dc bus, for the vehicle starting up operation. To implement the reverse power flow, the control method is described, and the converter operation principles are analyzed. The simulation and experiment results of a 1 kW prototype based on silicon carbide (SiC) MOSFETs on the HV side are provided.

Keywords

DC-AC power convertors; DC-DC power convertors; MOSFET; automobiles; load flow control; silicon compounds; switching convertors; MOSFET; QSC converter; SiC; control method; converter operation principles; dc-ac front-stage circuit; isolated quasi-switched-capacitor dc-dc converter; power 1 kW; reverse power flow study; synchronous-rectifying-current-doubler post-stage circuit; vehicle starting up operation; voltage step-down ratio;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (MWSCAS), 2013 IEEE 56th International Midwest Symposium on

Conference_Location

Columbus, OH

ISSN

1548-3746

Type

conf

DOI

10.1109/MWSCAS.2013.6674580

Filename

6674580