Multi-Objective Optimization Design and Analysis of Double-Layer Winding Halbach Fault-Tolerant Motor

Double-layer winding halbach fault-tolerant motor (DLW-HFTM) combines the advantages of the permanent magnet motor and the fault-tolerant motor, which are beneficial to improve the characteristics of the joint robot. First, the structure of DLW-HFTM is proposed in view of the requirement of the fault tolerance of drive motor on the joint robot without degrading the other performances, such as the torque and the efficiency. Then, the working principle and initial design dimensions are depicted, and a finite element parameter model is established by Maxwell software. Furthermore, the design parameters are optimized by multi-objective sensitivity analysis. Finally, the electromagnetic performances before and after optimization are analyzed, including no-load back EMF, torque, loss, efficiency, etc. Meanwhile, the fault-tolerant performance of the motor is analyzed. The research results show that the DLW-HFTM can improve the fault-tolerance on the condition of meeting the design requirements.