Abstract
As a high performance current-source three-phase AC/DC converter, the PWM control is promising to achieve a unity power factor and to improve the input current distortion. In contrast to the voltage-source converter, the LC filter connected between the source and the converter may cause a LC resonance both in steady and transient states. Many reports have been published to improve the current distortion in steady state and to suppress the current oscillation in transient state of the current-source PWM converter.The paper gives an analysis of voltage oscillation of the filter voltage and proposes the suppression approach for the current-source three phase PWM AC/DC converter. The effectiveness of the proposed approach has been verified by experiments.
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