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Comparison of Induction and PM Synchronous Motor Drives for EV Application Including Design Examples

2012; Institute of Electrical and Electronics Engineers; Volume: 48; Issue: 6 Linguagem: Inglês

10.1109/tia.2012.2227092

1939-9367

Gianmario Pellegrino, Alfredo Vagati, Barbara Boazzo, Paolo Guglielmi,

Magnetic Properties and Applications

Three different motor drives for electric traction are compared, in terms of output power and efficiency at same stack dimensions and inverter size.Induction motor, surface mounted permanent magnet (SPM) and interior permanent magnet (IPM) synchronous motor drives are investigated, with reference to a common vehicle specification.The induction motor is penalized by the cage loss but it is less expensive and inherently safe in case of inverter unwilled turn-off due to natural de-excitation.The SPM motor has a simple construction and shorter end-connections, but it is penalized by eddy current loss at high speed, has a very limited transient overload power and has a high uncontrolled generator voltage.The IPM motor shows the better performance compromise, but it might be the more complicated to be manufactured.Analytical relationships are first introduced and then validated on three example designs, Finite-Element calculated, accounting for core saturation, harmonic losses, the effects of skewing and operating temperature.The merits and limitations of the three solutions are quantified comprehensively and summarized by calculation of the energy consumption over the standard NEDC driving cycle.