In-Wheel Motor Design with Thermal and Mechanical Model Analysis for Electric Bikes

doi:10.23940/ijpe.22.09.p2.613625

Abstract

Abstract: The effect of CO₂ emission on the environment and climate change and the scarcity of fossil fuels is a global issue nowadays. To resolve this issue, the world is trying to switch from fuel vehicles to electric vehicles. But it is taking too long due to many limitations of electric vehicles. So, to resolve the limitations, various research projects are currently being conducted, on different parts of the electric vehicle. For best performance and high efficiency and torque, BLDC motors are used. The outer rotor BLDC motors provide very high efficiency. Still, the bikes available in the market have quite low speed or are very costly. So, it is important to increase the speed at a cheaper price. And for that, the In-Wheel motor is the best option. The In-Wheel bike with a motor is significantly different from a petrol (or center motor drive) motorbike as the engine (or center motor) is separate from the wheel as any heating of the engine/ motor would not heat the wheels but in the case of the In-Wheel motor, heating of the motor would produce a similar type of heating in the wheels. If the temperatures and the total magnetic flux density of the In-Wheel motor go beyond normal values, then there would be a chance that the electric bike will be heated at a very high temperature and may catch fire too. Also, the pressure on the wheel will affect the performance of the motor. So, it is essential to properly analyze and calculate the temperatures and pressures at different points of the motor. Hence, in this work, a novel approach of the E-Magnetic model, Lab model, Thermal model, and Mechanical model are analyzed properly using Ansys Motor-CAD. The Thermal model is used for getting the best temperatures of various parts of the In-Wheel motor. And the mechanical model is used to get the best pressure at the different points of the motor.

Key words: BLDC motor, electric bike, in-wheel motor, hub motor, mechanical model, thermal model

Sandeep Kumar Chawrasia, Aakash Das, and Chandan Kumar Chanda. In-Wheel Motor Design with Thermal and Mechanical Model Analysis for Electric Bikes [J]. Int J Performability Eng, 2022, 18(9): 613-625.

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