G1001-1-1 モータの振動騒音低減方法((1)音響)

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This paper describes a method of decreasing the electromagnetic vibration and noise level of motors. In order to investigate the factor of the vibration, we measure the vibration level by an experimental apparatus which can set the amount of the eccentricity of the rotor to the stator. The experimental result shows that one of the main factors of noise is the eccentricity which is caused by the inevitable manufacturing tolerances. Then, we propose the method of detecting the eccentricity of the motor by the voltage of each winding. We estimate the voltage change to the eccentricity of each winding by a simple model at first, and measure the relationship between the voltage and the eccentricity. As a result of the experiment, the voltage of each winding changes linearly to the eccentricity and the effectiveness of this method was verified.
2009-09-12