Abstract
Although electromagnetic vibration and noise of a squirrel-cage induction motor have been studied for a long time, many unclear factors for a capacitor induction motor used most widely under the single phase power source are still remained.
This paper clarifies the radial electromagnetic vibration of the capacitor induction motor running at no load from the experimental results. Also taking account of the effects of magnetic saturation and natural frequencies of the test motor, the following matters are described;
(1) Derivation of the general equation of electromagnetic force waves, considering not only forward magnetic field but also backward magnetic field, and its experimental verification,
(2) Features of producing the dominant electromagnetic vibration of the capacitor induction motor for the number of poles and the slot combination,
(3) Difference between the features of the three-phase squirrel-cage induction motor and the capacitor induction motor,
(4) Effect of skewed slot on the dominant electromagnetic vibration.
We hope that this paper will be a basis for the solution of electromagnetic vibration and noise of the capacitor induction motor.
