Three-dimensional full-domain steady-state temperature field simulation analysis of pedal motor for new energy vehicles

Most of the pedal motors of new energy vehicles (EVPM) use permanent magnet brushed DC motors (PMDCM), which will produce additional mechanical and electrical losses during the commutation process, resulting in excessive motor temperature. This paper takes a 2-pole 12-slot EVPM as an example and establishes a three-dimensional full-domain steady-state temperature field simulation model for the motor. First, theoretical research was conducted on the loss and heat transfer mode generated by brushed DC motors during operation. Secondly, the single-value conditions required for the simulation process were analyzed and calculated. Through finite element simulation, the three-dimensional full-domain steady-state temperature field distribution law of the motor at 25℃ and a load of 0.15 mN·m was obtained. Finally, a motor temperature rise test was conducted, and the simulated values of the motor housing temperature rise were compared with the experimental values, proving the accuracy and effectiveness of the model.