Regenerative braking of Brushless DC motor using Pulse width Modulation
SAE-PP-00161
7/16/2021
- Content
- Due to advancements in technology and drivetrains, the meaning of mechanical term braking, which resists motion by mechanical means, can be rewritten and altered to braking by either mechanical or electrical assistance. During the process, a large amount of energy is emitted in the form of heat. It's one of the issues that most of the electric vehicle sector is dealing with right now. Depending on the given speed and traffic situation, it is frequently required to reduce the motor's speed quickly and smoothly. To do so, a counter torque (also known as braking torque) is needed, which can be provided using electrical, mechanical, or a mix of both means. Specifically, electrical methods are more precise than mechanical methods, since the reaction time towards the actuation of braking effort is very less in the case of the electrical signal response. In electrical braking, the kinetic energy of the rotating and moving parts of the vehicle gets converted into electrical energy by electromechanical energy conversion. There are various methods of applying electrical braking in different situations. These can be classified as regenerative braking, plugging, and dynamic braking. A focussed study is carried out on regeneration of energy using BLDC motor in this paper. The proposed scheme is implemented using MATLAB Simulink and the results are illustrated. PI (Proportional Integral) control has been adopted in this model to have a smooth transition between mechanical and electrical braking since the combination of both of them is required in practical cases of EVs/HEVs. The implementation of the PWM technique to the inverter is performed using the PI controller to maintain the constant braking torque for smoothness in deceleration. Hence, it is possible to recover the maximum amount of energy using our RBS (Regenerative Braking System).
- Citation
- Dubey, S., "Regenerative braking of Brushless DC motor using Pulse width Modulation," SAE MobilityRxiv™ Preprint, submitted July 16, 2021, https://doi.org/10.47953/SAE-PP-00161.