Calculation of Temperature Rise and Analysis of Influencing Factors Based on Magnetic-thermal Coupling Flat Wire Motor
Flat wire-wound permanent magnet motors(PM motors)have received wide attention in the field of new energy vehicles due to their advantages of high slot fullness,good heat dissipation and compact wind-ing ends.Taking an automotive flat-wire wound permanent magnet synchronous motor with a rated speed of 6000 r/min as an example,a coupled electromagnetic and temperature field simulation model was estab-lished to calculate the effect of loss as a heat source on the temperature rise of the motor by adopting the uni-directional and bidirectional coupled temperature rise calculation methods,and the simulation results were verified experimentally.At the same time,the two-way magnetic-thermal coupling method was used to ex-plore the influence of coolant flow,type and inlet temperature on the temperature rise of the flat-wire motor under different operating conditions.The results show that the bidirectional magnetic thermal coupling tem-perature rise calculation results are more consistent with the test results,which verifies the accuracy of the bidirectional magnetic thermal coupling simulation analysis results.By calculating the temperature distribu-tion of each component under different influencing factors,the temperature of the motor components decrea-ses significantly with increasing coolant flow or decreasing coolant inlet temperature under both conditions.The cooling effect of cooling water is the best when air,aqueous ethylene glycol solution with different con-centrations,cooling oil and water are used as coolant respectively.
permanent magnet synchronous motorflat wire windingmagnetic-thermal couplingtempera-ture field
万方数据
维普
