Abstract
In order to meet the development requirements of micro-electric vehicle in efficiency, reliability and safety, thermal loss mechanism and temperature influence factors of in-wheel motor are study. The finite element method is used to simulate and analyze internal complex thermal loss and temperature field. The mathematical model of thermal loss and temperature field was established. The united simulation model of in-wheel motor was established by Ansoft Maxwell and Ansys Workbench software, transient state temperature were simulated and analyzed. The influences of load and revolving speed on temperature rise were also studied. The conformity of the test results with the final simulation results indicates that this method can be used to provide a theoretical basis to make further optimal design of the new driving in-wheel motor. DOI: http://dx.doi.org/10.5755/j01.mech.20.1.6588
Highlights
With the energy drying up and worsening environment, the new energy vehicles have obtained more attentions, and electric vehicles have an extraordinary development in many countries of the world because of their advantages of emission-free, low noise, energy saving and high efficiency [1]
Permanent magnet brushless direct current motor (PMBLDCM) are often used to drive electric vehicles, which are regarded as the in-wheel motors of electric vehicles, especially the short distance transportation micro-electric vehicle
The united simulation model of in-wheel motor was established by Ansoft Maxwell and Ansys Workbench software, and thermal loss and temperature field were simulated and analyzed
Summary
With the energy drying up and worsening environment, the new energy vehicles have obtained more attentions, and electric vehicles have an extraordinary development in many countries of the world because of their advantages of emission-free, low noise, energy saving and high efficiency [1]. The inwheel motor of micro-electric vehicle is PMBLDCM, which is installed in the wheel to improve the utilization rate of the body space and abandon the traditional clutch, gear, Transmission Bridge and other mechanical components. In-wheel motor has the advantages of reducing the vehicle weight, decreasing the mechanical losses and improving the driving sensitivity. In the micro-electric vehicle, the in-wheel motor possesses the narrow installation space, complex working condition, high power densities, no cooling fan and bad cooling environment and so on, which causes the temperature too high, and reduces the work performance and service life of the in-wheel motor. It is vital significance to study thermal loss mechanism and temperature influence factors of in-wheel motor, in order to meet the development requirements of micro-electric vehicle in efficiency, reliability and safety
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