Title :
An active auxiliary commutation circuit for inverters
Author :
Pinheiro, J.R. ; Hey, H.L.
Author_Institution :
Federal Univ. of Santa Maria
Abstract :
This paper proposes an active auxiliary commutation circuit (AACC) to achieve zero voltage switching (ZVS) in DC-AC power converters. The switching strategy implemented and the AACC make it possible for these power converters to operate with soft commutation of their main switches from no load up to full load, without increasing their voltage or current ratings. Due to commutation under zero voltage conditions, the main switches are implemented as a dual thyristor. The RMS current value carried by auxiliary switches is very low. To verify the feasibility of the proposed AACC, it is applied to a half-bridge inverter. Operation principle, commutation analysis, switching strategy and features are described and verified experimentally. These results have been obtained from a laboratory prototype operating at 30 kHz and rated at 300 W
Keywords :
DC-AC power convertors; PWM invertors; bridge circuits; commutation; field effect transistor switches; power MOSFET; power field effect transistors; power semiconductor switches; switching circuits; thyristor convertors; 30 kHz; 300 W; DC-AC power converter; ZVS; active auxiliary commutation circuit; commutation analysis; half-bridge inverter; inverters; operation principle; soft commutation; switching strategy; zero voltage switching; Electromagnetic interference; Inverters; Leg; Resonance; Stress; Switches; Switching circuits; Switching converters; Thyristors; Zero voltage switching;
Conference_Titel :
Power Electronics Specialists Conference, 1996. PESC '96 Record., 27th Annual IEEE
Conference_Location :
Baveno
Print_ISBN :
0-7803-3500-7
DOI :
10.1109/PESC.1996.548585