Three-phase flyback AC-DC convertor with sinusoidal supply currents
- 1 January 1991
- journal article
- Published by Institution of Engineering and Technology (IET) in IEE Proceedings B Electric Power Applications
- Vol. 138 (3) , 143-152
- https://doi.org/10.1049/ip-b.1991.0018
Abstract
A three-phase flyback AC-DC convertor, which has the step-up and step-down characteristics of output voltage, is described. The introduction of pulsewidth modulation makes it possible to obtain the sinusoidal supply currents with a near unity power factor. Three gate-turn-off thyristors provide the necessary control over the currents for unidirectional power flow. To improve upon the oscillatory transient operations, the tested system includes the digital PID controller using a microcomputer for output voltage regulations. The experimental results and state-space simulations confirm the usefulness of the presented convertor.Keywords
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