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Nguyen Minh Khoa: Modeling Magnetic noise in Induction Motors

Tid: Ti 2014-08-26 kl 10.00

Plats: Room 3721, Lindstedtsvägen 25, 7th floor, Department of mathematics, KTH

Opponent: José Santiago Rodriguez, Deng Yue

Handledare: Romain Haettel (ABB Corporate Research), Jesper Oppelstrup, Michael Hanke

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Traction motors are prevalent in our daily modes of transportation such as cars, buses, trucks, etc. As a consequence, they contribute a significant amount of noise in the environment, which can cause serious problems on the human well-being. This thesis aims to simulate traction motors in order to predict the electromagnetic noise level they produce. The modeling can help the engineers with a noise-efficient design. In this work, COMSOL Multiphysics software is used for the modeling. Two squirrel-cage induction motors are studied. Motor1 is a virtual motor and Motor3 is an ABB’s motor. Under no load condition and no defects, both motors show the results in accordance with the theory of induction motors. The results of Motor3 are compared between COMSOL Multiphysics and ADEPT (an in-house software of ABB for modeling motors). Acoustics modeling was done for Motor1. As expected, noise in Motor1 occur significantly at the frequencies close to the motor’s natural frequencies. There are a lot of rooms for future improvements as to the computation time and a more realistic model. Besides, empirical experiments will be very beneficial for the model’s validation.