An Analysis of Common Mode Voltage in Multi-level Matrix Converter

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Garousi, Bahram | 2015

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 47721 (05)
University: Sharif University of Technology
Department: Electrical Engineering
Advisor(s): Oraee Mirzamani, Hashem
Abstract:
The matrix converter is an array of controlled bidirectional semi-conductor switches that allows direct ac–ac conversion without an intermediate dc link. This converter has several attractive features that have been investigated in the last two decades. Multilevel converter technology has become increasingly popular in recent years due to high power quality,high-voltage capability, low switching losses and low EMI issues.This paper is concerned with applying multilevel techniques to direct ac–ac power converters and concentrates on developing the concepts of space vector modulation for a multilevel matrix converter. The common-mode voltage produced by a modern power converter has been reported as a main source of early motor winding failure and bearing deterioration.Furthermore, the presence of high frequency and large magnitude of common-mode voltage at the motor neutral point have been shown to generate high frequency leakage current to ground path as well as induced shaft voltage.finally the common mode voltage in multi-level matrix converter is investigated and two method is proposed for reducing it
Keywords:
Back-to-Back Converter ; Matrix Converter ; Space Vector Modulation ; Common Mode Voltage ; Direct Conversion ; Multilevel Matrix Converter

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