Title :
Novel ZVT-PWM converters with active snubbers
Author :
Tseng, Ching-Jung ; Chen, Chern-Lin
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
fDate :
9/1/1998 12:00:00 AM
Abstract :
An active snubber cell is proposed to contrive zero-voltage-transition (ZVT) pulsewidth-modulated (ZVT-PWM) converters. Except for the auxiliary switch, all active and passive semiconductor devices in a ZVT-PWM converter operate at zero-voltage-switching (ZVS) turn on and turn off. The auxiliary switch operates at ZVS turn off and near zero current-switching (ZCS) turn on. An analytical study on a boost ZVT-PWM converter with the proposed active snubber cell is presented in detail. A 750 W 80 kHz prototype of the boost ZVT-PWM converter has been built in the laboratory to experimentally verify the analysis. Six basic ZVT-PWM converters can be easily created by attaching the proposed active snubber cells to conventional PWM converters. A detailed design procedure of the proposed active snubber cell is also presented in this paper
Keywords :
DC-DC power convertors; PWM power convertors; snubbers; switching circuits; 750 W; 80 kHz; ZVS turn off; ZVS turn on; ZVT-PWM converters; active semiconductor devices; active snubbers; boost converter; near zero current-switching turn on; passive semiconductor devices; zero-voltage-switching; zero-voltage-transition; Joining processes; Laboratories; Prototypes; Pulse width modulation converters; Semiconductor devices; Snubbers; Switches; Switching converters; Zero current switching; Zero voltage switching;
Journal_Title :
Power Electronics, IEEE Transactions on
