Electromagnetic thermal design and analysis of aviation dual three-phase permanent magnet machine

The multi-phase redundant permanent magnet machine is essentially a permanent magnet synchronous motor (PMSM) with multiple sets of windings arranged on the stator. This configuration facilitates fault-tolerant operation of the PMSM in the event of one or multiple phase windings failing. In response to the practical requirements of electromechanical actuation systems in the aviation industry, this paper proposed a solution for a high-power, high-speed multi-phase redundant permanent magnet machine. The stator and rotor configuration of the multi-phase machine, along with short-circuit current suppression, are analysed, leading to the design of a prototype with specifications of 7.3 kW and 14,000 rpm. The finite element method is employed to simulate the machine's performance under no-load and full-load conditions, as well as its redundancy and thermal characteristics. The simulation results verify the correctness of the design approach well.