IIT Jodhpur proposes speed control method of EVs

The proposed work has significant scope in improving driving comforts. The aim is to leverage the inherent qualities of disturbance rejection and robustness. 

Indian Institute of Technology (IIT) Jodhpur’s research work presents a solution to reduce oscillation in Electric Vehicles due to uneven drive surface. The proposed approach by the researchers is an Integral Sliding Mode Control Based Direct Torque Control (ISM-DTC) method for Induction Motor (IM).  

The 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. The research paper was published by Deepak Fulwani, associate professor, Department of Electrical Engineering, IIT Jodhpur, along with Shivam Chaturvedi, Rammohan and Sandeep Yadav in IEEE Transactions Vehicular Technology. 

Deepak Fulwani 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 out 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. 

IIT Jodhpur is providing courses in this field such as MTech (cyber physical systems). The program will provide detailed training on patent landscaping as well as MTech projects aligned with industry, sponsored and consultancy projects available in the department. The program provides a flexible academic mechanism with the option to continue to PhD in MTech-PhD dual degree mode. 

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