Abstract
This paper deals with the weight reduction design of In-Wheel type motor for high power density. Accordingly, characteristic and weight of the motor caused by modifying reduction gear ratio are examined. Weight of motor is minimized by modulating the ratio of stack length and external diameter of stator. Then, In-Wheel motor geometry based on the prototype is optimized to get the determined parameters using response surface methodology (RSM) and Finite Element Method (FEM). Optimal design of core usage in rotor is conducted for minimizing weight of motor which has identical characteristic to the prototype. Characteristic analysis is conducted by using equivalent circuit analysis of PM type motor. Through the presented weight of In-Wheel type motor, total weight is reduced to 25%, and power density is improved to 57% from the prototype motor.
Highlights
An IPMSM(Interior Permanent Magnet Synchronous Motor) having high output is widely applied to industries at the appropriate range for high speed and mechanical stability[1]
In-Wheel type motor has been investigated extensively. Because this InWheel type motor is installed in Wheel directly; power train components can be removed, and it has high system efficiency
The moment that car braked, it is possible to improve a mileage collecting braking energy from regenerative braking control. It deals with the weight reduction design of In-Wheel type motor for power density improvement
Summary
An IPMSM(Interior Permanent Magnet Synchronous Motor) having high output is widely applied to industries at the appropriate range for high speed and mechanical stability[1]. In-Wheel type motor has been investigated extensively Because this InWheel type motor is installed in Wheel directly; power train components can be removed, and it has high system efficiency. It can provide a system of new concept platform applied in the Eco-friendly car. The moment that car braked, it is possible to improve a mileage collecting braking energy from regenerative braking control. In this paper, it deals with the weight reduction design of In-Wheel type motor for power density improvement. Characteristic analysis is conducted by using equivalent circuit analysis of PM type motor
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