Retrieval of Power from Regenerative Braking During Rapid Deceleration

The Electric Vehicles are necessarily powered from batteries, which are feasible means of storage of electricity. The Time taken for full charge of the battery pack and the mileage provided by it are the critical parameters of an Electric Vehicle. But when deceleration rate is high; the energy recovered from the electric vehicle is very high. The battery pack cannot store the high amount of power which exists for very short period of time. If this issue is resolved, then with given fully charged battery pack, the value of kilometres travelled can be increased. The main aim of this paper is to provide an efficient way to utilize the power which is recovered during regenerative braking. Major modules of the paper involve controlling of three phase induction motor without Rotor position sensors. The battery pack provides DC which is converted to AC using classical H-Bridge inverter using SVPWM. The functionality of the system is to exactly emulate the existing electric vehicle topology with regeneration. Under different deceleration condition, the power recovered is monitored and the capacity of the battery system is dynamically adjusted by Super Capacitors. For real time implementation, a DSP processor is chosen which runs the software routines for the vector control and space vector modulation.