Acquisition Method for Equivalent Thermal Conductivity Coefficient of Stator Winding of Permanent Magnet Motor

doi:10.3969/j.issn.1000-1093.2021.10.017

Abstract

Abstract: Permanent magnet motor is widely used in various electric drive applications because of its high power density. The temperature rise of motor winding is an important factor to determine the rated power of motor. In the thermal analysis model of motor，it is the most difficult to determine the equivalent physical properties of winding model.A fitting method of equivalent thermophysical properties of winding based on motor test is proposed and compared with the measurement method of equivalent winding sample and the simulation method of complete winding wire model. Through the test verification，the winding sample is limited by the test conditions and its application scope is limited.The temperature rise of the whole wire model is small because the filling efficiency of impregnating varnish is not considered，but it can be used in the design stage. The fitting method of equivalent thermophysical properties of winding has high accuracy.Through verification，the proposed thermal evaluation method can accurately and quickly evaluate the thermophysical properties of motor winding，and a solution is proposed to determine the equivalent thermal conductivity of the simplified winding model.

Key words: electricdrivevehicle, permanentmagnetsynchronousmotor, statorwinding, effectivethermalconductivity, temperaturerise

CLC Number:

TM351

LI Ye, LI Qi, FAN Tao, WEN Xuhui, ZHAO Yihui. Acquisition Method for Equivalent Thermal Conductivity Coefficient of Stator Winding of Permanent Magnet Motor[J]. Acta Armamentarii, 2021, 42(10): 2215-2222.

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