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

Author

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

Author_Institution

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

Volume

1

fYear

2000

fDate

6/22/1905 12:00:00 AM

Firstpage

314

Abstract

This paper presents a novel zero voltage and zero current switching (ZVZCS) three-Level (TL) DC/DC power 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 ZCS for the inner switches. The principle of operation and the DC characteristics of the new converter are analyzed and verified on a 6kW, 100 kHz experimental prototype

Keywords

DC-DC power convertors; power capacitors; switching circuits; 100 kHz; 6 kW; DC characteristics; auxiliary circuit; freewheeling stage; operating principle; outer switches; phase shift control; primary current reset; primary side flying capacitor; zero current switching; zero voltage switching; zero voltage zero current switching three-level DC/DC power converter; Bridge circuits; Capacitors; DC-DC power converters; Rectifiers; Stress; Switches; Switching circuits; Switching converters; Zero current switching; Zero voltage switching;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition, 2000. APEC 2000. Fifteenth Annual IEEE

Conference_Location

New Orleans, LA

Print_ISBN

0-7803-5864-3

Type

conf

DOI

10.1109/APEC.2000.826121

Filename

826121