Title :
An improved full-bridge zero-voltage-transition PWM DC/DC converter with zero-voltage/zero-current switching of the auxiliary switches
Author :
Lee, Dong-Yun ; Lee, Byoung-kuk ; Yoo, Sang-Bong ; Hyun, Dong-seok
Author_Institution :
Dept. of Electr. Eng., Hanyang Univ., Seoul, South Korea
Abstract :
In this paper, a novel full-bridge (FB) zero-voltage-transition (ZVT) pulsewidth modulation (PWM) DC/DC converter topology is proposed. The proposed FB-ZVT PWM DC/DC converter has zero-voltage switching (ZVS) of main switches for the entire line and load range and an advantage of achieving ZVS and zero-current switching of the auxiliary switches using the auxiliary network. The auxiliary network is simply composed of a saturable inductor, auxiliary capacitors, and auxiliary diodes. With the help of the proposed auxiliary network, the improved FB-ZVT PWM DC/DC converter has such characteristics as higher overall system efficiency and better utilization of the auxiliary switches compared with the conventional FB-ZVT PWM DC/DC converter. The operation principles are explained in detail and the several interesting simulation and experimental results verify the validity of the proposed circuit with an 83 kHz 1 kW prototype converter using insulated gate bipolar transistors
Keywords :
DC-DC power convertors; PWM power convertors; bridge circuits; inductors; insulated gate bipolar transistors; switching circuits; 1 kW; 83 kHz; PWM DC/DC converter; ZCS; ZVS; auxiliary capacitors; auxiliary diodes; auxiliary network; auxiliary switches; full-bridge zero-voltage-transition; insulated gate bipolar transistors; pulsewidth modulation; saturable inductor; system efficiency; zero-current switching; zero-voltage switching; DC-DC power converters; Diodes; Inductors; Network topology; Pulse width modulation; Pulse width modulation converters; Switched capacitor networks; Switches; Zero current switching; Zero voltage switching;
Journal_Title :
Industry Applications, IEEE Transactions on
