Design Method for Improving Torque Density of Axial-Flux Permanent Magnet Motor in Personal Lightweight Electric Vehicle
Date Issued
2011
Date
2011
Author(s)
Lan, I-Wei
Abstract
Nowadays, there are many different vehicles in this world, bike, scooter, car, train, MRT system …etc. These kinds of vehicle almost cover user’s requirement. There is a new kind of vehicle called PLEV, personal lightweight electric vehicle, and it provides an easy means for the last-mile service. PLEV is foldable and portable EV. It has direct drive motor and lightweight structure.
EV traction motors always reach torque command as power requirement. Higher torque command means more motor weight and volume, and it decrease battery performance in same vehicle space. It would be more consider in PLEV, because motor weight percent in vehicle is larger. The purpose of this research is to design a high torque density axial-flux motor which is lightweight and suitable for a PLEV.
This research proposes a design method with software tools for improving torque density of axial-flux motor. The method is proposed that magnetic design to increase torque density and structure design to decrease motor structure weight. In this research, FEM software JMAG and ABAQUS are used to analysis magnetic and structure design. This research is also proposed motor design program to shorten design period.
There are two points in this research. One is to finish motor parametric operation program to decrease magnet design period. That can also reduce design variables of sensitive analysis. Another is use ESO (evolution structure optimum) to analysis motor structure. After above, this research proposes PLEV motor, doing test and verify it to show research achievement.
Subjects
PLEV
AFPM
torque density
lightweight
ESO
Type
thesis
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