Abstract
This paper presents a Zero-Voltage-Transition (ZVT) boost converter using a soft switching auxiliary circuit. This converter has the following features: (1) soft switching of the main switch and boost diode under all operating conditions; (2) reduced auxiliary circuit losses due to soft switching of the auxiliary switch; (3) feed-forward of a part of the auxiliary circuit energy to the output thereby reducing the conduction losses of the main and auxiliary switches. The principle of operation and design of the proposed converter is given in the paper. Experimental results, from a 250 W, 127 Volt input laboratory prototype switching at 100 kHz, are given to verify 'proof-of-concept' of the proposed topology.
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