학술논문
Control Method for Distortionless Zero-Cross in Active Unity Power Factor Rectifiers.
Document Type
Article
Source
Subject
*ELECTRIC current rectifiers
*PHASE-locked loops
*VOLTAGE references
*HARMONIC suppression filters
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Language
ISSN
0885-8993
Abstract
Accurate synchronization and harmonics control are keys to achieve a distortionless zero-cross of currents in active unity power factor rectifiers. This article proposes a method to achieve optimal operation: 1) by settling a synchronization path that feeds the phase-locked loop with the output voltage reference that sets the theoretical unity power factor operation, and 2) low-order harmonics control with zero-cross driven antiwindup to reduce distortion further. Controller design is detailed and supported by theoretical analysis; the key performances are proved by experimental verification. [ABSTRACT FROM AUTHOR]