DocumentCode :
1912867
Title :
Soft switched capacitively coupled DC-AC converter for high power
Author :
Ehsani, M. ; Wu, T.S.
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
fYear :
1993
fDate :
2-8 Oct 1993
Firstpage :
800
Abstract :
A capacitively coupled DC-AC power converter which is capable of zero current soft switching is presented. A form of amplitude modulation is introduced to provide a sinusoidal output waveform. Due to its favorable current stresses on the switches, this converter is suitable for high current high power inductive load applications. With this technique, switching losses can be reduced. The soft switching method is accomplished by the alternating voltage of the capacitor. The series inductive snubbers assure the zero current turn-on of the switches. Reduction of the switching losses implies that the switching frequency and the overall system efficiency can be increased for high-power gate-turn-off devices. Since this converter can operate at higher switching frequencies, the reactive component sizes can be decreased and the power density can be raised in high-power applications. The zero current soft switching method makes the capacitively coupled converter suitable for high-current, high-power inductive load applications, such as motor drives, without significantly increasing the conduction losses
Keywords :
load (electric); overcurrent protection; power convertors; switching circuits; thyristor applications; DC-AC power converter; GTO; ZCS; amplitude modulation; capacitive coupling; current stresses; efficiency; inductive load applications; motor drives; power density; reactive component sizes; series inductive snubbers; sinusoidal output waveform; switches; switching frequency; switching losses; zero current soft switching; zero current turn-on; Amplitude modulation; Capacitors; Couplings; Snubbers; Stress; Switches; Switching converters; Switching frequency; Switching loss; Voltage;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Industry Applications Society Annual Meeting, 1993., Conference Record of the 1993 IEEE
Conference_Location :
Toronto, Ont.
Print_ISBN :
0-7803-1462-X
Type :
conf
DOI :
10.1109/IAS.1993.298990
Filename :
298990
Link To Document :
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