Title :
Modular, pinched DC-link and soft commutated three-level inverter
Author :
Chang, Jie ; Hu, Jun ; Peng, Fang Z.
Author_Institution :
Rockwell Inst. Sci. Center, Thousand Oaks, CA, USA
Abstract :
A modular soft-commutation scheme is proposed for three-level inverters. The DC-link voltages are pinched to a neutral point when the PWM pattern changes. Two mirror-symmetric quasi-resonant sub-circuits are specially designed as the inverter´s optional module. New features include modularity, fewer component counts and lower voltage ratings, reduced common-mode and balanced link-capacitor voltages. The effect of the neutral line current on the synchronization of zero voltage swings of the upper and lower resonant banks has been analyzed
Keywords :
commutation; invertors; resonant power convertors; synchronisation; DC-link voltages; PWM pattern; balanced link-capacitor voltages; lower resonant banks; lower voltage ratings; mirror-symmetric quasi-resonant sub-circuits; modular pinched DC-link inverter; modularity; neutral line current effect; soft commutated three-level inverter; upper resonant banks; zero voltage swings synchronisation; Capacitors; Costs; Pulse width modulation; Pulse width modulation inverters; RLC circuits; Resonance; Resonant inverters; Stress; Switches; Voltage;
Conference_Titel :
Power Electronics Specialists Conference, 1999. PESC 99. 30th Annual IEEE
Conference_Location :
Charleston, SC
Print_ISBN :
0-7803-5421-4
DOI :
10.1109/PESC.1999.785643
