Abstract
This paper describes the measurement method to obtain the motor exciting foce Air-conditioning system use. One is the direct measurement method. The motor excitation force was measured using a test system with the motor and a load cell. In this method, we grasped characteristics of motor exciting force. Another one is the indirect method. The finite-element model for the motor was created, and the circumferential acceleration responce of the motor housing was calculated in loading circumferential force. One other hand, the circumferential acceleration of motor housing was measured. Using both the calculated acceleration and the measured acceleration, the motor exciting fore was estimated. An electromagnetic vibration torque is one of the circumferential force of motor. We tried to calculate the vibration torque using the equivalent circuit of the motor.
