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Control and performance of a zero‐current‐switched, three‐phase PWM inverter equipped with resonant circuits on the ac side
Author(s) -
Fujita Hideaki,
Ogasawara Satoshi,
Akagi Hirofumi
Publication year - 2000
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/(sici)1520-6416(200006)131:4<85::aid-eej11>3.0.co;2-y
Subject(s) - inverter , current (fluid) , electronic circuit , pulse width modulation , resonant inverter , voltage , rlc circuit , electrical engineering , insulated gate bipolar transistor , control theory (sociology) , engineering , computer science , control (management) , capacitor , artificial intelligence
This paper presents a zero‐current‐switched voltage‐fed inverter equipped with resonant circuits on the ac side. The current flowing through a switching device, that is, IGBT, is the sum of the load current and the resonant current. When the amplitude of the resonant current is larger than that of the load current, the current in the switching device becomes zero at an instant in each resonant cycle. This allows the switching device to be turned on or off at the zero current. The zero‐current switching makes a significant contribution to reduction of switching losses and electromagnetic noises. In this paper, the principle of zero‐current‐switching operation, along with a novel control scheme, is described from a theoretical and practical point of view. Experimental results obtained from a laboratory system of 5 kVA verify the practicability. Moreover, the switching and conduction losses of the proposed soft‐switched inverter are compared with those of a conventional hard‐switched inverter. © 2000 Scripta Technica, Electr Eng Jpn, 131(4): 85–95, 2000