Winding analysis of stator module-combined permanent magnet synchronous machine

The large permanent magnet synchronous machine (PMSM) brings great difficulties in manufacture, assembly, and maintenance. A kind of unwinding stator module-combined permanent magnet synchronous machine (SMCPMSM) is proposed. This structure achieves modular manufacture of large PMSM, convenient for machining, repairing, and replacing. By removing part of the coils, the stator is divided into blocks to achieve this decoupling of the windings between modules. The three-phase winding is symmetrical, and each module can operate independently. This paper describes the SMCPMSM structure and the stator block rule. The winding analysis is performed using the slot electromotive force phasor diagram method. The winding distribution coefficient, winding electromotive force, and magnetomotive force are calculated. The electromagnetic performance is simulated and analyzed. An 80 kW prototype is developed, and its experiments are carried out. The experimental results verify the feasibility and rationality of the proposed SMCPMSM.