Three-phase flyback AC-DC convertor with sinusoidal supply currents
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| Title | Three-phase flyback AC-DC convertor with sinusoidal supply currents |
| Publication Type | Conference Paper |
| Year of Publication | 1991 |
| Authors | Itoh R, Ishizaka K |
| Conference Name | Electric Power Applications, IEE Proceedings B |
| ISBN Number | 0143-7038 VO - 138 |
| Keywords | 3-phase flybacks AC-DC convertor, computerised control, digital PID controller, gate-turn-off thyristors, microcomputer, microcomputer applications, oscillatory transient operations, output voltage regulations, power convertors, power factor, Pulse width modulation, pulsewidth modulation, sinusoidal supply currents, state-space simulations, step-down characteristics, step-up characteristics, unidirectional power flow |
| 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 |
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