Abstract
When the magnetic bearing is coupled to the motor, the size of the motor is greatly increased as a separate structure that controls the shaft from the outside of the rotor. In this paper, a method is proposed to minimize the size increase of the entire system by inserting the existing magnetic bearing into the rotor through the halbach arrangement. The halbach arrangement makes it possible to eliminate the magnetic circuit inside the rotor, so the rotor back yoke can be minimized. As the rotor back yoke is minimized, the inner space of the rotor can be secured, and the existing separate magnetic bearing is inserted inside the rotor. The all-in-one magnetic bearing in which the magnetic bearing and the rotor are integrated controls the rotor from the inside of the shaft, and it is possible to replace the existing separate magnetic bearing. A 16-pole 24-slot surface permanent magnet synchronous motor was selected as an analysis model. Through finite element analysis, the size of torque and bearing force was maximized, and the ripple of each component was designed to be minimized. Through the new magnetic bearing motor presented in this paper, it is possible to utilize the advantages of magnetic bearings and to minimize the size and weight.
Published Version
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