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A transformer assisted zero voltage switching scheme for the neutral-point-clamped (NPC) inverter

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2 Author(s)
Xiaoming Yuan ; Power Electron. & Electrometrol. Lab., Fed. Inst. of Technol., Zurich, Switzerland ; I. Barbi

This paper proposes a transformer assisted PWM zero voltage switching neutral-point-clamped (NPC) inverter. With the assistance of a transformer assisted small rating lossless auxiliary circuit, the main switches work with zero voltage switching without suffering from any voltage/current spikes, under simple explicit control. The technique allows for higher operating frequency and better device utilization of the NPC inverter. Operation, analysis, designing as well as testing results from a 7 kW prototype are presented in detail

Published in:

Applied Power Electronics Conference and Exposition, 1999. APEC '99. Fourteenth Annual  (Volume:2 )

Date of Conference:

14-18 Mar 1999