Title :
Soft switched PWM converters with low commutation loss using an active snubber
Author_Institution :
Dept. of Electron. Eng., City Univ. of Hong Kong, China
Abstract :
A new soft switched active snubber circuit is proposed to achieve zero-voltage and zero-current switching for all the switching devices in PWM DC-DC converters. The unique location of the snubber capacitor and inductor ensures low current/voltage stresses and commutation losses. With a saturable reactor, the conduction loss of the auxiliary switch could be further minimized. A boost converter adopting this technique is presented as an example, to illuminate its operation principles and derive the design procedures. Simulation and hardware implementation have been made to validate its performance. Some other basic PWM DC-DC topologies using the proposed snubber have also been given
Keywords :
DC-DC power convertors; PWM power convertors; commutation; snubbers; switching circuits; PWM DC-DC converters; PWM DC-DC topologies; active snubber; boost converter; commutation loss; conduction loss; performance validation; saturable reactor; soft-switched PWM power converters; switching devices; zero-current switching; zero-voltage switching; Capacitors; DC-DC power converters; Inductors; Pulse width modulation; Pulse width modulation converters; Snubbers; Switches; Switching circuits; Switching converters; Zero current switching;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 1999. APEC '99. Fourteenth Annual
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-5160-6
DOI :
10.1109/APEC.1999.749741