The Effect of Disperse voltage on Dynamic Braking Energy Recovery in Induction Motor Based EV Drives

The efficient energy extraction during braking would improve the economics of the Electric vehicle. Since the time constant of the energy extraction defines the EV's braking performance, the drive train dynamics define the efficient energy braking. In this work, an arbitrary rotatory reference frame-based analysis is adopted to estimate the energy of the induction motor's rotor as a function of load torque and speed instantaneously. Based on the instantaneous available energy, the appropriate instantaneous braking methodology is adopted to accomplish the desired braking response of the vehicle. The efficacy of the proposed methods are verified through experiments conducted on lab prototype.