Performance evaluation of an electric vehicle using in-wheel motor in the longitudinal direction
This study explores the latest electric vehicle driving system concept, the in-wheel motor (IWM) on the rear drive to minimize the weight carried by the current dynamic electric vehicle. The current electric vehicle driving system is a single motor integrated with a gearbox and differential mechanis...
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| Main Author: | |
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| Format: | Thesis |
| Language: | English English |
| Published: |
2024
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| Online Access: | http://eprints.utem.edu.my/id/eprint/28253/1/Performance%20evaluation%20of%20an%20electric%20vehicle%20using%20in-wheel%20motor%20in%20the%20longitudinal%20direction.pdf http://eprints.utem.edu.my/id/eprint/28253/2/Performance%20evaluation%20of%20an%20electric%20vehicle%20using%20in-wheel%20motor%20in%20the%20longitudinal%20direction.pdf |
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| Summary: | This study explores the latest electric vehicle driving system concept, the in-wheel motor (IWM) on the rear drive to minimize the weight carried by the current dynamic electric vehicle. The current electric vehicle driving system is a single motor integrated with a gearbox and differential mechanism. The integration of these three mechanical systems causes the dynamic performance of the electric vehicle to not be fully exploited. Therefore, the objective of this study is to evaluate the capability of electric vehicles based on in-wheel motors. To achieve this goal, the first step is to develop a mathematical model of the in-wheel motor using MATLAB/Simulink software. This mathematical model uses the actual parameters of the in-wheel motor, controlled by a PID controller, and verified through a series of experiments. Furthermore, to improve the confidence in the capability of the in-wheel motor, it has been applied to a mathematically developed vehicle model. The IWM based vehicle sub-model simulation has been validated in a hardware-in-the-loop simulation (HILS) using a sub-vehicle model integrated with an actual IWM. The IWM test on the sub-vehicle shows good results and increases confidence that it can be used in actual vehicles. Besides, the rear-wheel-based electric vehicle model has been designed using SolidWorks software. This design is done in detail based on the actual hardware dimensions to ensure the feasibility and functionality of the prototype to be fabricated. Subsequently, the in-wheel motor-based electric vehicle has been fabricated in the Autotronic laboratory based on the designed dimensions. At the same time, a 5-DOF longitudinal simulation model of a vehicle integrated with an in-wheel motor has been developed using actual parameters from the fabricated electric vehicle. This simulation model has been verified through a series of experiments conducted on two different road surfaces, flat and uphill with a gradient of 8.45°. Each experimental test was performed at different speeds of 10, 20, and 30 km/h. The results show that the minimum relative absolute error (MRAE) value is less than 5 %, increasing confidence that the developed simulation model is adequate. Therefore, researchers and the industry can utilize the findings of this study for observation and application of in-wheel motor systems on actual vehicles. |
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