Review on Influence of Electrical Noise on Field Elements

摘要

The increasing amounts of three-phase squirrel-cage induction motors over the years are fed by variable-speed drives. In such a machine high frequency generation is caused by the high carrier frequencies of the pulse-width modulation, the associated short rise times of the IGBT output, and the reflected waves from the motor terminals. EMI is also produced by the harmonics which are generated by the carrier frequencies. This EMI/RFI is also referred to as electrical noise. This paper is focused on the influence of the electrical noise emitted by variable-speed drives on field components in Textile machines and CNC Lathe machines. Components failed during a year have been collected and possible solutions have been proposed.