ZVZCS three-level DC-DC converter using passive clamping circuit

Author

Sun, Tiecheng ; Guo, Jianhui ; Li, Rui ; Fu, Lei

Author_Institution

Sch. of Electr. Eng.&Autom., Harbin Inst. of Technol., Harbin

fYear

2008

fDate

3-5 Sept. 2008

Firstpage

1

Lastpage

4

Abstract

This paper proposes a zero-voltage and zero-current-switching three-level (ZVZCS TL) DC-DC converter using passive clamping circuit to reduce switching loss, improve current trails of IGBT and improve the converter efficiency. The proposed TL converter can achieve effective zero-voltage switching (ZVS) for the TL leg and zero-current switching (ZCS) for the two-level leg. By using the passive clamping circuit, the proposed converter can reduce voltage stress on switches, widen load range for soft-switching, reduce switching loss, and can reduce the secondary transient over voltage. The loss of the auxiliary clamping circuit is very low. The principle and operation modes of the converter are analyzed and the necessary condition of soft switching is also analyzed. The proposed theory has been verified on a 24V/6A, 60 kHz experimental prototype.

Keywords

DC-DC power convertors; passive networks; switching convertors; zero current switching; zero voltage switching; IGBT; ZVZCS three-level DC-DC converter; current 6 A; frequency 60 kHz; passive clamping circuit; voltage 24 V; zero-voltage and zero-current-switching converter; Circuits; Clamps; DC-DC power converters; Insulated gate bipolar transistors; Leg; Stress; Switching converters; Switching loss; Zero current switching; Zero voltage switching; Passive clamping circuit; TL converter; ZVZCS;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicle Power and Propulsion Conference, 2008. VPPC '08. IEEE

Conference_Location

Harbin

Print_ISBN

978-1-4244-1848-0

Electronic_ISBN

978-1-4244-1849-7

Type

conf

DOI

10.1109/VPPC.2008.4677514

Filename

4677514