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Novel Reluctance-type Magnetic Geared Motor with Integrated with High-speed Bearingless Motor

Magnetic geared motors have many advantages over mechanical gearboxes, including reduced maintenance, no requirement for lubrication, and intrinsic overload protection. However, in terms of durability, the limited lifetime of the mechanical bearings holding the high-speed rotor is a critical issue. In order to solve this problem, a magnetic geared motor with an integrated bearingless motor in the high-speed rotor has been proposed. Suspension force is generated to the high-speed rotor by adding three-phase windings with different numbers of poles to the three-phase motor winding in the stator. However, in the previous papers, the levitation characteristics have not been discussed in detail, and the possibility of achieving it has not been clarified. Therefore, in this paper, the torque and magnetic suspension force of the proposed motor are analyzed using the finite element method to propose a motor structure that has high potential for realization.