1. Key Laboratory of Smart Grid of Ministry of Education Tianjin University Tianjin 300072 China; 2.Beijing Research Institute of Precise Mechanical and Electronic Control Equipment Beijing100076 China
Abstract：The analytical expressions ofpermanent magnet synchronousmotor radial electromagnetic force are derived according to the Maxwell stress equation, and the sources of radial electromagnetic force of each order and frequency are analyzed and concluded. Taking a 45-slot 10-polepermanent magnet synchronous propulsion motor (PMSPM) as an example, the electromagnetic finite element model and structure finite element model of the motor are establishedrespectively.Then the modal analysis is carried out on the motor.The radial electromagnetic force obtained from the electromagnetic finite element model is coupled to the structural finite element model, so that the harmonic response analysis is performed on the electromagnetic vibrationof the motor. Finally, the acceleration spectrum of the prototype is compared with the corresponding finite element simulation result, which have verified the correctness of the radial electromagnetic force analytic expressions and finite element simulation results.
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2017, Vol. 32 
