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Jaeger, Markus; Drichel, Pascal; Schröder, Michael; Berroth, Joerg; Jacobs, Georg; Hameyer, Kay
Archives of Electrical Engineering (Online), 01/2021, Letnik: 70, Številka: 3Journal Article
Production deviations have a remarkable effect on the radiated sound of electrical machines, introducing additional signal components besides the fundamental field waves which significantly change and enrich the subjectively perceived sound characteristic. In literature these harmonics are mainly traced back to dynamic eccentricity, which modulates the fundamental fieldwaves. In this paper a thorough mechanic and electromagnetic analysis of a modern, well-constructed traction drive (permanent magnet synchronous machine) is performed to showthat for this typical rotor configuration dynamic eccentricity is negligible. Instead, deviations in the rotor magnetization are shown to be the dominant cause for vibration harmonics.
