Title :
Three-phase flyback AC-DC convertor with sinusoidal supply currents
Author :
Itoh, R. ; Ishizaka, K.
Author_Institution :
Fac. of Eng., Fukuoka Univ., Japan
fDate :
5/1/1991 12:00:00 AM
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 :
computerised control; microcomputer applications; power convertors; pulse width modulation; 3-phase flybacks AC-DC convertor; digital PID controller; gate-turn-off thyristors; microcomputer; oscillatory transient operations; output voltage regulations; power factor; pulsewidth modulation; sinusoidal supply currents; state-space simulations; step-down characteristics; step-up characteristics; unidirectional power flow;
Journal_Title :
Electric Power Applications, IEE Proceedings B
