This paper has proposed a systematic approach for the design of a high torque density AFPM wheel motor for light electric vehicles. The design procedure started from a preliminary design to choose the numbers of slots and poles and the winding configuration. The multifunctional optimal design with magnetic circuit models was then performed to determine an optimal shape of the wheel motor. Finally, the optimal shape was verified and refined by the finite element analysis. The resulting wheel motor has a maximum torque of 124 Nm, torque density of 16.4 Nm/kg with active materials, and the maximum output power at 8 kW. Although the motor d- and f-axis inductances differ insignificantly due to the configuration of SPM, the maximum torque per ampere theory is still applied to estimate the torque and power versus speed curves, where the corresponding current phase angles are obtained. These curves will be very useful for efficiently controlling the proposed wheel motor. Two prototype wheel motors are fabricated, and will be installed on two rear wheels of an LEV after a standard performance test.
Multifunctional optimal design of axial-flux permanent magnet wheel motors for light electric vehicles
EVS, Electric Vehicle Symposium, 26 ; 1225-1232
2012
8 Seiten, 12 Bilder, 5 Tabellen, 10 Quellen
Aufsatz (Konferenz)
Englisch
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