Hybrid Energy Scooter Electric Powertrain Design
Date Issued
2007
Date
2007
Author(s)
Yu, Chen-Yen
DOI
zh-TW
Abstract
Electric powertrain is completely responsible for the performance of electric vehicle; as a result, the electric powertrain design is the important issue of electric vehicle design. Since the electric powertrain is the multi-discipline subject, this research will propose the completely design approach and use this method to design the electric powertrain of hybrid energy scooter of NTU (National Taiwan University).
In the power specification, this study will discuss the cross effect of power curve and motor CPSR(Constant Power Speed Ratio, CPSR). Meanwhile, in order to extend the mileage, the hybrid energy scooter has two energy sources: Fuel-cell and Li-ion battery. This study will propose the energy management method and provides energy simulation for this scooter. In addition, in the past, the design choice between in-wheel motor and the motor with reduction is the hard decision for the engineer. This research will compare these two choices from the view of mechanical design and motor design. The result shows that the single gear transmission will have more advantages such as mechanical design and motor design under the suitable motor design and control.
In the subsystem design, it is in terms of meeting the scooter spec. that this study will propose the design method including the motor electric constants design process, motor geometry design, and the FEM (Finite Element Method, FEM) analysis and simulation. This study will also investigate the saturation phenomenon and its effect to the motor performance.
The initial experiment shows that the motor performance is very close with the simulation result and it proves the design method validity. It also shows that the design meet the scooter specification.
Finally, this systematic design method not only successful designs the electric powertrain of NTU hybrid energy scooter but it also can be applied to other electric vehicles.
Subjects
電動動力系統
能量管理
馬達設計
內置式磁石永磁同步馬達
複合能量電動機車
Hybrid energy scooter
Electric powertrain
Energy management
motor design
interior permanent magnet synchronous motor
Type
thesis