Abstract
In this paper, an axial flux partitioned stator hybrid-excited less-rare-earth permanent magnet (PM) synchronous (AFPSHL-PM) motor is proposed, where the design concepts of hybrid excited, partitioned stator and less-rare-earth motor are integrated into the axial flux motor successfully. The motor topology and operating principle are investigated firstly, and then the initial design of the motor is implemented. Based on the 3D finite element method (FEM), the optimal design parameters are determined by multi-objective optimization method. The electromagnetic characteristics of the motor, including the flux linkage, back EMF, electromagnetic torque, and anti-demagnetized risk are analyzed and compared with that of the initial design. In addition, the flux regulation capabilities are evaluated under different field current in excitation windings. The results not only verify the effectiveness of the motor design but also reveal that the AFPSHL-PM motor can exhibit high output torque as well as wide speed range.
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