Title :
Zero-voltage- and zero-current-switched PWM DC-DC converters using active snubber
Author :
Zhu, Julian Y. ; Ding, Daohong
Author_Institution :
Dept. of Autom. Control, Nanjing Univ. of Aeronaut. & Astronaut., China
Abstract :
A novel active snubber soft-switched method is proposed to achieve zero-voltage and zero-current switching (ZV-ZCS) for pulsewidth modulation (PWM) DC-DC power converters. The unique location of the snubber capacitor and inductor ensures low current stress and commutation losses in the auxiliary circuit. 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 of a 350-W 150-kHz boost converter have been made to validate the operation and the efficiency improvement. Some other basic PWM DC-DC topologies with the proposed snubber are also been given
Keywords :
DC-DC power convertors; PWM power convertors; active networks; commutation; snubbers; switching circuits; 150 Hz; 350 W; PWM DC-DC power converters; ZCS; ZVS; active snubber; boost converter; commutation losses; current stress; inductor; snubber capacitor; Circuit simulation; DC-DC power converters; Hardware; Inductors; Pulse width modulation; Pulse width modulation converters; Snubbers; Stress; Switched capacitor circuits; Zero current switching;
Journal_Title :
Industry Applications, IEEE Transactions on
