Title :
A transformer assisted zero voltage switching scheme for the neutral-point-clamped (NPC) inverter
Author :
Yuan, Xiaoming ; Barbi, Ivo
Author_Institution :
Power Electron. & Electrometrol. Lab., Fed. Inst. of Technol., Zurich, Switzerland
Abstract :
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
Keywords :
PWM invertors; switching circuits; transformers; 7 kW; PWM inverter; ZVS; higher operating frequency; neutral-point-clamped inverter; small rating lossless auxiliary circuit; transformer assisted zero voltage switching; Circuit testing; Power electronics; Power system harmonics; Pulse width modulation inverters; Rails; Resonance; Snubbers; Switching circuits; Voltage control; Zero voltage switching;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 1999. APEC '99. Fourteenth Annual
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-5160-6
DOI :
10.1109/APEC.1999.750529
