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Type: Artigo de periódico
Title: High-precision current source using low-loss, single-switch, three-phase AC/DC converter
Author: Pomilio, JA
Spiazzi, G
Abstract: 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.
Country: EUA
Editor: Ieee-inst Electrical Electronics Engineers Inc
Citation: Ieee Transactions On Power Electronics. Ieee-inst Electrical Electronics Engineers Inc, v. 11, n. 4, n. 561, n. 566, 1996.
Rights: fechado
Identifier DOI: 10.1109/63.506121
Date Issue: 1996
Appears in Collections:Unicamp - Artigos e Outros Documentos

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