Improving the Energy Efficiency of Light Rail Transit System in Malaysia Through the use of Regenerative Braking

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Hilman Syahmi bin Abdul Malek
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Regenerative braking is an energy recovery mechanism that slows down a moving vehicle or object by converting its kinetic energy into a form that can be either used immediately or stored until needed. In this mechanism, the electric traction motor uses the vehicle's momentum to recover energy that would otherwise be lost to the brake discs as heat. This contrasts with conventional braking systems, where the excess kinetic energy is converted to unwanted and wasted heat due to friction in the brakes, or with dynamic brakes, where the energy is recovered by using electric motors as generators but is immediately dissipated as heat in resistors. In addition to improving the overall efficiency of the vehicle, regeneration can significantly extend the life of the braking system as the mechanical parts will not wear out very quickly. The most common form of regenerative brake involves an electric motor functioning as an electric generator. In electric railways, the electricity generated is fed back into the traction power supply. In battery electric and hybrid electric vehicles, the energy is stored chemically in a battery, electrically in a bank of capacitors, or mechanically in a rotating flywheel. The type of motor that been used in electric train in Malaysia is Induction Motor and there are several methods to control the speed of Induction Motor. Therefore, the speed control of induction motor was designed and verified by simulation using MATLAB – Simulink. The power generated from regenerative braking system is also calculated. Lastly, through this project, it is intended to provide a valuable resource for further progress in this area of study
Interim Semester 2020/2021
Regenerative , IM Motor , Speed Control