Optimization design of a new type of Halbach array motor with magnetic axis offset

This paper proposes a novel Halbach array structure based on the traditional radial and tangential magnetized Halbach array permanent magnet motor. This structure enables the magnetic field lines to be concentrated, thereby enhancing the motor torque. Concurrently, the magnetic axis offset is designed on this basis by combining ferrite with low magnetic conductivity and NdFeB with high magnetic conductivity. This design effectively reduces the gap between the electromagnetic torque and the peak current angle of the reluctance torque, and fully utilizes both the electromagnetic and reluctance torques to further improve the total output torque of the motor. The newly proposed motor, known as the Magnetic Axis Offset Halbach Motor (MAOHM), is a result of this design. Furthermore, this paper also employs a finite element method to study and compare the proposed motor with the traditional motor, serving to verify the rationality and effectiveness of the design.