Title :
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
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;
Conference_Titel :
Industry Applications Conference, 1997. Thirty-Second IAS Annual Meeting, IAS '97., Conference Record of the 1997 IEEE
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-4067-1
DOI :
10.1109/IAS.1997.629075
