Motors are used in a wide range of the drive region from low speed to high speed. Magnetic properties of electrical steel sheets are used as core materials for motors, change by applying the stress. When the motor is driven, the stress by the centrifugal force is applied the rotor core. Therefore, it is important to understand the relationship between the stress and magnetic property. In this paper, a measurement device of the magnetic properties of ring core under the centrifugal force will be developed. At first, we evaluated the stress components in the ring core under the centrifugal force by theoretical stress analysis. In addition, we will fabricate a new device to apply centrifugal force and measure the magnetic properties of a non-oriented electrical steel sheet under centrifugal force.
Kai et al. (Sat,) studied this question.