Abstract
There is an increasing demand for efficient electric motors in various industrial fields, such as electric vehicles. When developing electric motors, it is inevitable to consider electromagnetic noise and vibration generated by electric motors. Electric motors in general consists of a stator and a rotor that generates torque as a resultant of distributed electromagnetic force generated between the rotor and the stator. Since this force is oscillatory and noisy, it causes structural vibration of the stators. In this paper, forced response vibration analysis of induction motors under operating conditions is presented. The finite element methods are applied for the electromagnetic and structural dynamics analyses. The results are compared with measurements. It is revealed that the vibration response contains frequency components that are related to the mechanical rotational frequency and the side-band frequencies of the carrier frequency.
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