Design and Comparative Analysis of Dual Winding Dual Magnet Machines With Different PM Arrangements

This paper presents an investigation into the design optimization and comparative analysis of dual winding dual magnet machines (DWDM) with different permanent magnet (PM) arrangements. Firstly, the operation principle of DWDMs is introduced, and four PM arrangements following a consequent-pole structure are presented. Secondly, the four topologies are globally optimized to enable a fair comparison of performance. Then, the electromagnetic performances, including no-load performance and rated-load performance, are compared, and analyzed. Additionally, the overload and demagnetization performances are also analyzed and discussed. The results demonstrate that the proposed PM arrangements can effectively reduce flux leakage and improve the torque density and power factor of DWDMs. Finally, a DWDM prototype with dual Halbach Array PM is manufactured and tested to validate the analysis results.