Evaluation of a temperature model for an Interior Permanent Magnet Synchronous Machine for parallel hybrid electric heavy vehicles

This paper presents a simulation model of the temperature's influence on the electromagnetic characteristics of an Interior Permanent Magnet Synchronous Machine (IPMSM). Simulation results of an IPMSM traction machine is presented, and experimental measurements verify the accuracy of the model; no load measurements provide the induced voltage as function of temperature and dynamic tests evaluate the machine under load for four different temperatures. The simulations and experimental test results show good match concerning the temperatures influence on the linked magnetic d flux, which is directly related to the flux from the permanent magnets. Furthermore, both simulations and experimental tests show that the linked magnetic q flux is almost unaffected by changes in the machine temperature, and that the torque decreases slightly when the temperature rise.