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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS) Indonesian Journal of Electrical Engineering and Computer Science
Sreedharan, Sasidharan
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Control & Systems Engineering Electrical & Electronics Engineering

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Design and implementation of 4-quadrant chopper for speed control of EVs and regenerative braking analysis Abdelfatah, Magdy Saoudi; Solanki, Parmal Singh; Sreedharan, Sasidharan
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 16, No 1: March 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v16.i1.pp407-417

Abstract

This paper presents a novel 4-quadrant chopper design for controlling the speed of electric vehicles, featuring a regenerative braking mechanism to improve energy efficiency. Regenerative braking recovers energy during deceleration by converting kinetic energy into electrical energy stored in the battery. This process activates automatically when the accelerator pedal is released, slowing the vehicle while reducing reliance on mechanical brakes, which remain available for emergency situations. The system’s voltage control is achieved using a pulse-width modulation (PWM) technique that adjusts the duty cycle of switching devices. A microcontroller serves as the system’s core, generating PWM signals and coordinating its operation. The performance of the chopper was evaluated through simulations and experiments, demonstrating that optimal energy recovery occurs at duty cycles of 55-65%. The results revealed that up to 400 joules of energy can be regenerated per braking cycle, particularly in stop-start driving conditions. This innovative design contributes to a 5-10% extension in battery life per charge cycle, enhancing the overall efficiency and sustainability of electric vehicles. The proposed system demonstrates significant potential for energy recovery and reduced wear on mechanical braking systems, paving the way for more efficient electric vehicle technologies.
An approach for loss minimization and capacity savings in residential microgrid networks in Oman Sreedharan, Sasidharan; Solanki, Parmal Singh; Abdelfatah, Magdy S.; Wartana, I Made
Indonesian Journal of Electrical Engineering and Computer Science Vol 39, No 1: July 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v39.i1.pp1-10

Abstract

In this paper, an approach for end-user-based energy saving and loss reduction technique in residential networks has been proposed. The proposed approach is applied to an Oman case study of community microgrid networks by connecting automatically switched capacitors to improve power factor and analyzed for capacity saving and loss minimization. The proposed approach can reduce the cost of electrical bills in the total community microgrid by minimizing losses and the capacity investment cost saving of all equipments in the transmission and distribution line from the generation to the end user. In addition, this study focuses on the healthy conclusion that average kVA capacity could be saved to an extent of 12.22% and in economic terms, approximately USD 3.68 per hour in the microgrid. This proposed technique can be implemented as a model community project for other similar residential community systems.
Co-Authors Abdelfatah, Magdy S. Abdelfatah, Magdy Saoudi I Made Wartana Solanki, Parmal Singh