Title :
New soft-commutated PWM inverter with AC current transformer
Author :
Matsuo, Hirofumi ; Iida, Katsuji ; Kurokawa, Fujio ; Harada, Kouichi
Author_Institution :
Dept. of Electron., Nagasaki Univ., Japan
Abstract :
The soft-commutated PWM inverter is very attractive for high power applications. In the conventional soft-commutated PWM inverter, however, there exist some deteriorative problems such as high voltage and/or high current stresses on the switches, the necessity of the additional switches for realizing soft-commutated PWM, and the relatively large power loss caused by the large circulating current composed of the load current and the resonant current. This paper presents a new soft-commutated PWM inverter, in which an AC current transformer and a main resonant capacitor are used to detect the value and the polarity of the AC load current, and to realize the soft-commutation of the switches without causing the above deteriorative problems. The operation and the characteristics of this soft-commutated PWM inverter are analyzed and its usefulness is confirmed by experiments
Keywords :
commutation; current transformers; invertors; power convertors; power transformers; pulse width modulation; switching circuits; AC current transformer; AC load current; applications; characteristics; circulating current; current stress; load current; operation; power loss; resonant capacitor; resonant current; soft-commutated PWM inverter; switches; voltage stress; Capacitors; Circuit noise; Current transformers; Diodes; Pulse width modulation inverters; Resonance; Switches; Switching circuits; Switching frequency; Voltage;
Conference_Titel :
Industrial Electronics, Control, and Instrumentation, 1993. Proceedings of the IECON '93., International Conference on
Conference_Location :
Maui, HI
Print_ISBN :
0-7803-0891-3
DOI :
10.1109/IECON.1993.339250
