Comprehensive Comparison of a High-Speed Permanent Magnet Synchronous Motor Considering Rotor Length–Diameter Ratio

For high-speed permanent magnet machines (HSPMMs), many design schemes of rotor length–diameter ratios can satisfy the constraints multiple physical fields during motor period. The ratio greatly impacts comprehensive performances fields. However, these analyses are missing in existing literature. Therefore, this paper focuses on influence performances. Firstly, finite element models (FEM) built by ANSYS Workbench platform and Motor-CAD software. Then, comparatively analyzed. Finally, designed HSPMM is implemented, based one prototype 60 kW, 30,000 rpm to verify results comparative analysis. Based analysis above, influent laws discussed summarized, which be used as a reference for structural HSPMMs.