Experiments and Design Criteria for a High-Speed Permanent Magnet Synchronous Generator With Magnetic Bearing Considering Mechanical Aspects

In this work, the design and experimental analysis of a high-speed permanent magnet (PM) synchronous generator (PMSG) with a magnetic bearing without mechanical friction were performed. The rotor size was derived using the torque per rotor volume method and an analytical method. Rotor structure analysis was performed to verify the validity of the selected sleeve and PM thickness. The magnetic bearing was designed considering the input aerodynamic force and DN-factor. Then, the validity of the proposed design method was verified through the electromagnetic and mechanical analysis, design, and comparison with the experimental results of a high-speed PMSG (124 kW and 36 krpm).