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Compensated carrier PWM synchronization: a novel method to achieve self-regulation and AC unbalance compensation in AC fed converters

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3 Author(s)
Wiechmann, E.P. ; Concepcion Univ., Chile ; Espinoza, J.R. ; Rodriguez, J.L.

The compensated carrier PWM synchronization (CCPS) method for AC-fed PWM power converters is presented. The method provides a solution to PWM converters fed by industrial power systems (IPSs). Such environments usually present unbalances and magnitude fluctuations of AC voltages. Those circumstances impair standard PWM techniques because low-order harmonics are produced and DC-link regulation is poor. To reduce these undesirable effects produced by IPS, a method based on using independently compensated carriers per phase was conceived. In particular, CCPS prevents second harmonic generation and achieves converter self-regulation. The method can be used with any PWM technique and bidirectional power flow. The evaluation of CCPS is based on a complete performance comparison of a PWM rectifier with and without CCPS for various known PWM techniques

Published in:

Power Electronics, IEEE Transactions on  (Volume:7 ,  Issue: 2 )

Date of Publication:

Apr 1992

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