誘導電動機の振動特性解析

抄録

As represented by electric vehicles, there is an increasing demand for efficient electric motors in various industrial areas. For the development of such electric motors, consideration of electromagnetic noise and vibration produced by the motors is inevitable. The electric motors consist of stationary and rotating components, which are respectively called as stator and rotor. When the electric motor is in operation, electromagnetic force is generated between the rotor and the stator. The electromagnetic force is used for the generation of torque, but as a byproduct, the stator is subjected to oscillatory load, which produces structural vibration of the stator. In this paper, we focus on the vibration analysis of induction machines, including vibration analysis under operating conditions, and experimental modal analysis. Spectral analysis of the vibration response of the induction machine revealed that large components can be observed at frequencies that are related to mechanical resonance, and side-bands of the integer multiples of the carrier-frequency of the PWM control.