Electromagnetic‐Thermal‐Mechanical–Optimization Design of a 355 kW Three‐Phase Variable Frequency PMSM

Focusing on the integrated multiphysics domain optimization design process for industrial permanent magnet motors, this paper presents the electromagnetic‐thermal–rotor mechanical strength integrated design of a 355 kW, 1000 r/min industrial permanent magnet synchronous motor, yielding comprehensive design results that meet all motor performance requirements. A multi‐objective optimization design method for permanent magnet synchronous motors is proposed based on a multiphysics domain collaborative optimization model, which effectively addresses the challenges of large computational workload and time consumption in the industrial motor optimization design process. Finally, finite element simulation validations of electromagnetic performance, temperature rise, and rotor mechanical structure strength were conducted, with the results matching the optimization outcomes, providing a reference for the development of industrial permanent magnet motors.