Title :
A Zero-Current-Transition Converter With Reduced Auxiliary Circuit Losses
Author :
Das, Pritam ; Moschopoulos, Gerry
Author_Institution :
Univ. of Western Ontario, London
fDate :
7/1/2007 12:00:00 AM
Abstract :
A new zero-current-switching (ZCS) pulsewidth-modulated (PWM) boost converter is proposed in this paper. The converter´s main power switch can operate with ZCS due to an active auxiliary circuit that diverts current away from the switch just before it is turned off. The circuit allows the converter to operate with ZCS without the disadvantages typically found in other, previously proposed ZCS PWM converters such as increased switch stresses and excessive circulating current. In this paper, the operation of the proposed converter is explained in detail and a procedure for the design of the converter is presented and demonstrated with an example. The feasibility of the new converter is confirmed with results obtained from a 50-kHz, 1-kW experimental prototype.
Keywords :
PWM power convertors; switched mode power supplies; switching convertors; zero current switching; ZCS PWM converters; active auxiliary circuit; auxiliary circuit losses; circulating current; energy-efficient converters; frequency 50 kHz; power 1 kW; pulsewidth-modulated boost converter; soft switching; switch stresses; switch-mode power supplies; zero-current-switching boost converter; zero-current-transition converter; Diodes; Insulated gate bipolar transistors; Pulse width modulation; Pulse width modulation converters; Stress; Switches; Switching circuits; Switching converters; Zero current switching; Zero voltage switching; Energy-efficient converters; pulsewidth-modulated (PWM) converters; soft switching; switch-mode power supplies; zero-current switching (ZCS);
Journal_Title :
Power Electronics, IEEE Transactions on
DOI :
10.1109/TPEL.2007.900600
