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17. Performance Comparison Between Surface-Mounted and Interior PM Motor Drives for Electric Vehicle Application.

Author

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

Subjects
PERFORMANCE evaluation, ELECTRIC vehicles, PERMANENT magnet motors, ENERGY consumption, ELECTRIC inverters, FINITE element method
Abstract

Electric vehicles make use of permanent-magnet (PM) synchronous traction motors for their high torque density and efficiency. A comparison between interior PM and surface-mounted PM (SPM) motors is carried out, in terms of performance at given inverter ratings. The results of the analysis, based on a simplified analytical model and confirmed by finite element (FE) analysis, show that the two motors have similar rated power but that the SPM motor has barely no overload capability, independently of the available inverter current. Moreover, the loss behavior of the two motors is rather different in the various operating ranges with the SPM one better at low speed due to short end connections but penalized at high speed by the need of a significant deexcitation current. The analysis is validated through FE simulation of two actual motor designs. [ABSTRACT FROM PUBLISHER]

Published
2011
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