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.
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