Artículos de revistas
High-precision current source using low-loss, single-switch, three-phase AC/DC converter
Registro en:
Ieee Transactions On Power Electronics. Ieee-inst Electrical Electronics Engineers Inc, v. 11, n. 4, n. 561, n. 566, 1996.
0885-8993
WOS:A1996UV21200006
10.1109/63.506121
Autor
Pomilio, JA
Spiazzi, G
Institución
Resumen
A three-phase ac/dc converter based on isolated Cuk topology feeding an inductive load is presented, The main goal is to get a compact, highly stable current source to feed an electromagnet. A high power factor is achieved, at constant duty-cycle and switching frequency, by discontinuous input current mode operation, The converter presents a linear relationship between the duty-cycle and the output current, making it easier to design the control system. Additionally the voltage stress on the power transistor is constant and does not depend on the duty-cycle. An auxiliary circuit allows zero voltage turn-off while limiting the over-voltage on the switch produced by the transformer leakage inductance, Pulse-width modulation (PWM) control is used to reduce sensitivity to line disturbances and to eliminate the 300-Hz ripple on the output current, Experimental measurements taken on a 400-W prototype confirm theoretical forecasts. 11 4 561 566