Title :
ARCPI resonant snubber for the neutral-point-clamped (NPC) inverter
Author :
Yuan, Xiaoming ; Orglmeister, Gunthard ; Barbi, Ivo
Author_Institution :
Power Electron. & Electrometrol. Lab., Swiss Federal Inst. of Technol., Zurich, Switzerland
Abstract :
This paper reports a resonant snubber for the neutral-point-clamped (NPC) inverter using the auxiliary resonant-commutated-pole-inverter (ARCPI) technique. The proposal guarantees zero voltage switching of the main switches and zero current switching of the auxiliary switches without incurring any voltage or current spikes across or through the main switches and without subjecting to any modulation constraints. Operation principle of the ARCPI NPC inverter is illustrated. A simple method dealing with the static overvoltage problem of the inner switches is described. Commutation durations and current stresses in the basic ARCPI circuit are analyzed. The results enable mathematical understanding and practical designing of the basic ARCPI circuit. In particular, self balancing quality and controlling possibility of the DC center potential in the basic ARCPI circuit are investigated. The proposal is verified by a 3 kW half bridge ARCPI NPC inverter laboratory prototype
Keywords :
DC-AC power convertors; bridge circuits; commutation; invertors; resonant power convertors; snubbers; switching circuits; 3 kW; auxiliary resonant-commutated pole inverter; auxiliary switches; commutation duration; current stresses; half-bridge ARCPI NPC inverter; main switches; neutral point clamped inverter; operation principle; resonant snubbers; static overvoltage problem; zero current switching; zero voltage switching; Circuits; Inverters; Proposals; Resonance; Snubbers; Stress; Switches; Voltage control; Zero current switching; Zero voltage switching;
Conference_Titel :
Industry Applications Conference, 1999. Thirty-Fourth IAS Annual Meeting. Conference Record of the 1999 IEEE
Conference_Location :
Phoenix, AZ
Print_ISBN :
0-7803-5589-X
DOI :
10.1109/IAS.1999.801650
