Multi-Objective MMF Reconstruction Design for Vibration Suppression in Modular Dual 3-Phase PMSM With Open-Phase Fault

This paper proposes a multi-objective magnetomotive force (MMF) reconstruction design for vibration suppression of modular dual 3-phase permanent magnet synchronous motor (PMSM) with the open-phase fault. Firstly, the modular dual 3-phase winding configuration is introduced. The modular single-phase winding function harmonics distribution is clarified. The MMF and radial force characteristics of the modular dual 3-phase PMSM with the open-phase fault are investigated, and the multiple sources of the dominant 2nd-order vibration are revealed. Then, the limitation of the traditional MMF reconstruction method is pointed out with emphasis. Afterwards, a multi-objective MMF reconstruction design to reduce the 2nd-order vibration with the open-phase fault is proposed, and the main flow chart of the design for vibration suppression is illustrated. The optimization parameters and objectives are clarified, and the optimal solution is selected by the particle swarm optimization algorithm. The dominant 2nd-order radial force with the open-phase fault is greatly suppressed. Thus, the vibration performance is greatly improved in the fault mode. Finally, the prototype of a modular dual 3-phase 48-slot/8-pole PMSM is manufactured. Several experiments are carried out to validate the theoretical analysis.