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Loss mapping of an Insert Permanent Magnets Synchronous Machine for parallel hybrid electric heavy vehicles

This paper focuses on mapping the different losses present in an Insert Permanent Magnet Synchronous Machine (IPMSM). The machine is designed as a traction machine according to the requirements of a parallel hybrid electric heavy vehicle. This includes a wide constant power range and overload capability, all to be fitted in a strictly limited space in the vehicle. In order to meet the requirements, the machine is designed with a speed higher than that of the conventional powertrain and connected via a fixed speed reduction. The electromagnetic power loss estimation is performed in the post processor of a 2D FE simulation tool. The outcome from the study compares the initial rough power loss calculation to extensive calculation in order to distinguish and separate different sources of power losses and correlate the characteristics to the measurements.