A new ZVS LCL-resonant push-pull DC-DC converter topology

Author

Ryan, Michael J. ; Brumsickle, William E. ; Divan, Deepak M. ; Lorenz, Robert D.

Author_Institution

Dept. of Electr. & Comput. Eng., Wisconsin Univ., Madison, WI, USA

Volume

2

fYear

1997

fDate

5-9 Oct 1997

Firstpage

1673

Abstract

A new LCL-resonant DC-DC power converter topology is presented in which the resonant CL components are located after the output rectifier diodes. The push-pull power converter topology is suitable for unregulated low-voltage to high-voltage power conversion, as in battery powered systems where input currents can exceed input voltages by an order of magnitude. The resonant circuit operates at twice the switching frequency, allowing for small resonant components. The MOSFET primary switches operate under zero voltage switching (ZVS) conditions due to commutation of the transformer magnetizing current and the snubbing effect of the drain-source capacitance. Output rectifier turn-off is effectively snubbed by the resonant capacitor. Laboratory tests show 93% efficiency at 12 V, 160 A input; 235 V, 1.8 kW output. A surge capability of 5 kW for 1 s has been demonstrated. Circuit simulations and experimental results are presented and are shown to have excellent agreement with fundamental mode analysis

Keywords

DC-DC power convertors; field effect transistor switches; power MOSFET; power field effect transistors; power semiconductor switches; power transformers; resonant power convertors; switching circuits; 1 s; 1.8 kW; 12 V; 160 A; 235 V; 5 kW; 93 percent; MOSFET primary switches; ZVS LCL-resonant push-pull DC-DC power converter topology; drain-source capacitance; fundamental mode analysis; output rectifier diodes; snubbing effect; surge capability; transformer magnetizing current commutation; unregulated low-voltage to high-voltage power conversion; zero voltage switching; Batteries; Circuit topology; DC-DC power converters; Diodes; Magnetic resonance; Power conversion; RLC circuits; Rectifiers; Switching frequency; Zero voltage switching;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Conference, 1997. Thirty-Second IAS Annual Meeting, IAS '97., Conference Record of the 1997 IEEE

Conference_Location

New Orleans, LA

ISSN

0197-2618

Print_ISBN

0-7803-4067-1

Type

conf

DOI

10.1109/IAS.1997.629075

Filename

629075