Title :
A soft commutated neutral-point-clamped (NPC) inverter: theory and experimentation
Author :
Yuan, Xiaoming ; Barbi, Ivo
Author_Institution :
Power Electron. Inst., Fed. Univ. of Santa Catarina, Florianopolis, Brazil
Abstract :
A soft commutation circuit aimed to substitute for the conventional snubber in a GTO NPC inverter is presented in this paper. The small rating lossless auxiliary branch creates soft switching conditions for the main devices without having to subject them to extra voltage/current spikes or any modulation constraints. Hence it allows for considerable extension of the power range and the frequency range of the main installation. Operation, analysis, and designing of the circuit as well as the experimental results from a prototype are detailed in the paper
Keywords :
commutation; invertors; switching circuits; commutation analysis; frequency range extension; power range extension; small rating lossless auxiliary branch; soft commutated neutral-point-clamped inverter; soft commutation circuit; soft switching; Circuits; Diodes; Inductors; Pulse width modulation; Pulse width modulation inverters; Resonance; Snubbers; Switching frequency; Transducers; Zero voltage switching;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 1998. APEC '98. Conference Proceedings 1998., Thirteenth Annual
Conference_Location :
Anaheim, CA
Print_ISBN :
0-7803-4340-9
DOI :
10.1109/APEC.1998.653827
