Title :
An improved family of ZVS-PWM active-clamping DC-to-DC converters
Author :
Duarte, Cláudio M C ; Barbi, Ivo
Author_Institution :
Catholic Univ. of Pelotas, Pelotas, Brazil
Abstract :
A new family of DC-to-DC converters featuring clamping action, PWM modulation and soft-switching (ZVS) in both active and passive switches, is proposed to overcome the limitations of clamped mode DC-to-DC converters. The new family of converters is generated and the new circuits are presented. As the resonant circuits absorb all parasitic reactances, including transistor output capacitance and diode junction capacitance, these converters are suitable for high-frequency operation. Principle of operation, theoretical analysis, simulation and experimental results are presented, taken from a laboratory prototype rated at 1600 W, input voltage of 300 V, output voltage of 400 V, and operating at 100 kHz. The measured efficiency at full load was 98%
Keywords :
DC-DC power convertors; PWM power convertors; capacitance; electric reactance; resonant power convertors; switching circuits; 100 kHz; 1600 W; 300 V; 400 V; 98 percent; ZVS; ZVS-PWM active-clamping DC-to-DC converters; active switches; boost converter; clamped mode DC-to-DC converters; clamping action; diode junction capacitance; high-frequency operation; parasitic reactances absorption; passive switches; resonant circuits; soft-switching; transistor output capacitance; Clamps; DC-DC power converters; Diodes; Parasitic capacitance; Pulse width modulation; Pulse width modulation converters; RLC circuits; Switches; Switching converters; Zero voltage switching;
Conference_Titel :
Power Electronics Specialists Conference, 1998. PESC 98 Record. 29th Annual IEEE
Conference_Location :
Fukuoka
Print_ISBN :
0-7803-4489-8
DOI :
10.1109/PESC.1998.701970
