Experimental Validation of a Constant Torque Variable Deceleration Regenerative Braking System for a Brushless DC Motor

An electric vehicle’s regenerative braking system aids in the efficient application of battery power to prolong the vehicle’s range.In this paper, a constant torque variable deceleration single switch regenerative braking system for a bldc motor, which can be very effectively implemented in electic vehicles with lithium ion battery is proposed and performance is evaluated experimentally. The motor deceleration can be controlled by varying the charging current of the battery which depands upon the depression angle of brake pedal and constant braking torque is maintained by keeping the motor current constant at the time of regenerative braking. The suggested system was simulated and evaluated using MATLAB/Simulink model to validate its performance under various traction circumstances. The findings support the proposed system’s high capabilities.For experimental validation a prototype of the proposed system is fabricated and experiment conducted at different braking forces and speed. It has been established that the proposed system is capable of being implemented in a real-world setting.