Abstract: In recent years, increased concerns over the impact of the conventional car (ICE – Internal Combustion Engine) on the environment have led to renewed interest and advancement in the Electric Vehicle (EV). While the advancements in the EV technology have been able to overcome many of its initial limitations, the need to improve overall efficiency of the vehicle has led to the design of the regenerative braking system (RBS). The RBS will be used to convert the car’s mechanical energy and also the heat that would have been lost during braking into electrical energy. The RBS would be controlled using a PWM (Pulse Width Modulation) signal generated from a microcontroller. The duty cycle of the PWM signal would in turn depend on the response to a variable resistor which will be used to model the conventional braking. A higher resistance would generate a PWM signal with a higher duty cycle and in turn, a higher braking intensity. Therefore by varying the resistor value, the braking intensity can also be varied. The motor to be used in this system will primarily be a DC Motor. We intend to switch to an induction motor later on as this is currently the norm in the BEV (Battery Electric Vehicle) industry.In other term to maximize the efficiency of the RBS, it is important that we store some of the energy that may have otherwise been wasted. To achieve this, we implement the use of large capacitors connected in parallel to store the energy. This energy could then be used to recharge the batteries of the Electric vehicle (EV).

Keywords: Energy, flywheel, hybrid vehicle, regenerative braking.