Analysis on the Common-mode Voltage and its Effects of a Marine SPWM Frequency Conversion Speed Regulation System

Abstract

The AC frequency conversion speed regulation technology has been used widely in the ship field for its excellent operating and control characteristics, whereas it can also bring out negative effects such as the common-code voltage on the drive system. The analysis is made on the common-mode voltage of the SPWM frequency conversion speed regulation system, including its generation mechanism, spectrum features, negative effects and suppression methods, which provides beneficial reference and enlightenment for the improvement of the SPWM frequency converter technical performance as well as the equipment maintenance and management.