Abstract
In general, conventional hysteresis motors have a small torque-inertia ratio as compared with conventional servo motors, because the hysteresis material has a small hysteresis loop, a large loss caused by harmonic waves based on slots, and a large specific gravity.
The author has proposed a new rotor structure of an axial air gap hysteresis motor in which anisotropic barium ferrite and Al-alloy plates are utilized. The barium ferrite has a large hysteresis loop, a small loss caused by harmonic waves based on the slots, and a small specific gravity. The proposed motor has a small inertia as a print motor, a large starting torque and a large synchronous torque as compared with conventional hysteresis motors.
This paper presents the structure, the induction of the equivalent circuit containing hysteresis and induction torques, and the experimental characteristics of the motor. The experimental characteristics are close to the characteristics of a print motor.
