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High power factor PWM rectifiers with an analog pulsewidth prediction controller

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4 Author(s)
T. Ohnuki ; Fac. of Sci. & Eng., Tokyo Denki Univ., Saitama, Japan ; O. Miyashita ; T. Haneyoshi ; E. Ohtsuji

A single-phase PWM bridge rectifier controlled by a pulsewidth prediction (PWP) method to operate switching devices to realize a high power factor and to reduce the AC-side current harmonics is proposed. The PWP controller provides instantaneous current control with either a constant frequency carrier or a piecewisely fixed multiple-frequency carrier in one source-voltage cycle. The paper describes the control methods and implementation of analog PWP controllers, and performance characteristics of the rectifier. Unity displacement power factor was obtained and the AC-side current harmonics were reduced. Experimental results show the usefulness of the proposed method and applicability to rectifiers in UPS systems, etc

Published in:

IEEE Transactions on Power Electronics  (Volume:11 ,  Issue: 3 )