A zero-voltage and zero-current switching three-level DC/DC converter

Author

Canales, Francisco ; Barbosa, Peter ; Lee, Fred C.

Author_Institution

Bradley Dept. of Electr. & Comput. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA

Volume

17

Issue

6

fYear

2002

fDate

11/1/2002 12:00:00 AM

Firstpage

898

Lastpage

904

Abstract

This paper presents a novel zero-voltage and zero-current switching (ZVZCS) three-level DC/DC converter. This converter overcomes the drawbacks presented by the conventional zero-voltage switching (ZVS) three-level converter, such as high circulating energy, severe parasitic ringing on the rectifier diodes, and limited ZVS load range for the inner switches. The converter presented in this paper uses a phase-shift control with a flying capacitor in the primary side to achieve ZVS for the outer switches. Additionally, the converter uses an auxiliary circuit to reset the primary current during the freewheeling stage to achieve zero-current switching (ZCS) for the inner switches. The principle of operation and the DC characteristics of the new converter are analyzed and verified on a 6 kW, 100 kHz experimental prototype.

Keywords

DC-DC power convertors; switching convertors; 100 kHz; 6 kW; ZCS; ZVS; flying capacitor; freewheeling stage; high circulating energy; inner switches; limited ZVS load range; phase-shift control; rectifier diodes; severe parasitic ringing; zero-current switching three-level DC/DC converter; zero-voltage switching three-level DC/DC converter; zero-voltage switching three-level converter; Capacitors; DC-DC power converters; Diodes; Prototypes; Rectifiers; Switches; Switching circuits; Switching converters; Zero current switching; Zero voltage switching;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/TPEL.2002.805609

Filename

1158979