Optimal Design of a High Torque Density Wheel Motor for a Light Electric Vehicle
Date Issued
2010
Date
2010
Author(s)
Lee, Chung-Han
Abstract
In this thesis, a high torque density electric motor is designed for light electric vehicles. This directly driven axial-flux DC motor features compactness, low weight, and high efficiency, and is suitable for electric vehicles.
First of all, the motor and winding types were selected by comparing their advantages and disadvantages, and then the winding factor was calculated to choose the optimal number of slots and poles. Second, a 2-D magnetic circuit model and the electromagnetic equations were established for an optimal motor design with multifunctional optimizer. The resulting design was verified and refined by finite element analysis (FEA). A skewed-slot design was investigated to enhance the torque density performance and simplify the manufacturing process. Finally, the thermal analysis of this motor was used to ensure it operates at a safe temperature.
Subjects
wheel motor
in-wheel motor
torque density
skew-slot design
electric vehicles
Type
thesis
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ntu-99-R97522823-1.pdf
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