Abstract
Vibration and noise need to be calculated with a high degree of accuracy to estimate the radiated noise and vibration induced by the electromagnetic force from a motor. In the case of inverter motors, changes in rotation speed and load lead to changes in exciting frequencies and amplitudes of electromagnetic force harmonics. We developed a way to analyze frequency responses of electromagnetically induced vibration using the electromagnetic force in a representative revolution speed in the above conditions. We measured and calculated a sample motor's vibration induced by electromagnetic force of time order harmonics, which has a dominant effect on the overall vibration, and we compared levels of vibration velocity. We calculated both rotation speeds and vibration velocity levels, which had three observable peaks with a high degree of accuracy.
