Title :
A novel zero-voltage-switching (ZVS) boost converter by using a nonlinear magnetizing inductor of the transformer
Author :
Qian, Jinrong ; Batarseh, Issa ; Siri, K. ; Ehsani, M.
Author_Institution :
Dept. of Electr. & Comput. Eng., Central Florida Univ., Orlando, FL, USA
Abstract :
A technique using a nonlinear magnetizing inductor of the transformer is proposed to achieve zero-voltage-switching (ZVS) operation. ZVS and proper transformer core reset can be realized from the resonance that exists between the parasitic capacitance and the magnetizing inductance of the transformer. DC bias current applied to the transformer makes it operate in the nonlinear region of the B-H characteristic curve to make ZVS possible. It is shown that all switches can operate at ZVS or ZCS with minimum voltage and current stresses. Steady-state analysis is presented to illustrate the principle of operation. A 125 kHz, 100 watts ZVS clamp-mode isolated boost power converter is implemented to verify the proposed scheme
Keywords :
DC-DC power convertors; circuit testing; field effect transistor switches; network analysis; power MOSFET; power transformers; switching circuits; transformer cores; 100 W; 125 kHz; B-H characteristic curve; DC bias current; ZVS; boost power converter; magnetizing inductance; nonlinear magnetizing inductor; parasitic capacitance; resonance; steady-state analysis; transformer core reset; zero-voltage-switching; Inductance; Inductors; Magnetic resonance; Parasitic capacitance; Steady-state; Stress; Switches; Transformer cores; Zero current switching; Zero voltage switching;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 1995. APEC '95. Conference Proceedings 1995., Tenth Annual
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-2482-X
DOI :
10.1109/APEC.1995.468992
