Fast Calculation Method of Bi-Direction Coupling Between Electromagnetic-Thermal Field for FSPM Motor

This article aims to study the calculation method of the bi-direction coupling of electromagnetic (EM)-thermal field, focusing on the data transfer method between different types of mesh elements in different physical fields. First, a complete EM-thermal field bi-directional coupling analysis model is established, based on which the changing rule between the EM losses of different components of the motor and their temperature rise curves is studied. Although the complete bi-direction EM-thermal field coupling analysis method is closest to the actual operation of the motor, this method is computationally intensive and takes a long time to calculate. For this reason, this article also proposes an improved EM-thermal field bi-directional coupling calculation method based on the changing rule between the EM losses of different components of the motor and their temperature rise curves, significantly reducing the calculation time. The innovation of this article is to realize the data transfer between different types of mesh elements in different physical fields, find the changing rule between EM loss and temperature rise curve, and establish a fast calculation method of bi-direction coupling of EM-thermal field. Finally, an experimental platform is built, and the experimental results verify the accuracy of the proposed methods.