交流側に共振回路を接続した零電流スイッチング三相PWMインバータの制御法と動作特性 [in Japanese] Control and Performance of a Zero-Current-Switches Three-Phase PWM Inverter Equipped with Resonant Circuits on the AC-Side [in Japanese]
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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, i.e., an IGBT is a 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.<br>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 5kVA verify the practicability. Moreover, the switching and conduction losses of the proposed soft-switched inverter are compared with those of a conventional <br>hard-switched inverter.
- IEEJ Transactions on Sensors and Micromachines
IEEJ Transactions on Sensors and Micromachines 118(6), 748-756, 1998-06
The Institute of Electrical Engineers of Japan