New Delhi: Indian Institute of Technology, Jodhpur presented a research work as a solution to reduce oscillation in Electric Vehicles due to uneven drive surface. The solution is developed for electric two-wheeler vehicles.
The transport sector is a major contributor to carbon emissions, with internal combustion engine (ICE) vehicles responsible for approximately 26% of total air pollution. This push has stimulated research in the development and control of EVs, as well as the creation of efficient batteries, durable motor design, and cost-effective vehicle production methods to improve performance and make EVs a viable alternative to ICE vehicles.
The proposed approach by the researchers is an Integral Sliding Mode Control Based Direct Torque Control (ISM-DTC) method for Induction Motor (IM). This approach aims to leverage the inherent qualities of disturbance rejection and robustness against operational uncertainties and parametric variations. It also seeks to enhance the performance of the conventional Proportional-Integral (PI)-based DTC (PIDTC) approach in uncertain EV driving conditions.
Dr. Deepak Fulwani, Associate Professor, Department of Electrical Engineering, IIT Jodhpur, said, “The proposed work has significant scope in improving driving comforts affected by various road conditions for EVs.”
To maintain speed and serve as a nominal control, the proposed control method is integrated with PIDTC. The non-linear ISM loop effectively counteracts speed variations by ensuring that the electromagnetic torque and dynamic load torque demand are balanced. Additionally, the proposed control method cancels uncertainties.
The research was funded by the Department of Heavy Industries (DHI)- Non-Ferrous Materials Technology Development Centre (NFTDC), Hyderabad, India. The findings in this work can be fine-tuned for various electric vehicles to improve driving experience. However, a robust controller is developed which can mitigate effects of uneven road surfaces. The controller can be integrated with any existing controller so retrofitting is possible.
