Thermal-fluid and electromagnetic coupling analysis and test of a traction motor for electric vehicles |
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Authors: | Hao-Yen Howard Chang Frank Kou-Tzeng Lin |
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Affiliation: | 1. Department of Mechanical Engineering, National Taiwan University, Taipei, Taiwan;2. Mechanical and Mechatronics Systems Research Labortories, Industrial Technology Research Institute, Hsinchu, Taiwan |
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Abstract: | This paper proposes a multi-phasic coupling analysis and test of a 50 kW traction motor for electric vehicles. The temperature-dependent properties of the electrical and magnetic materials of the interior permanent magnet traction motor are not negligible over a wide operation range of the vehicle. The heat produced by the electromagnetic power loss changes the motor’s properties, and in turn the motor performance changes to produce a different power loss. This two-way coupled electromagnetic and thermal-fluid analysis of the torque and speed curve and the transient thermal response at a rated operation point are simulated and compared with the traditional one-way coupling analysis. The simulation results are also compared with and proved by experiments on a prototype motor. The experimental results show that it is critical and necessary to predict the motor performance by means of the proposed two-way coupling analysis that provides more accurate information than the traditional one-way coupling analysis. |
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Keywords: | Electromagnetic analysis thermal-fluid analysis temperature dependence coupling analysis |
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