A Cost-Effective Regenerative Braking System for Electric Vehicles Driven by Induction Machine

In this paper, a cost-effective regenerative braking system for Electric Vehicles (EV) driven by induction machine (IM) is proposed. The structure of the system is simple because the extra demands are only the capacitor bank and resistor bank. A five- phase IM is chosen in this paper to adapt the high- power trend of EV and lower the device size. The required reactive power for the braking system is supplied by means of a parallel connected capacitor bank and a voltage source PWM converter. The capacitor bank is used as a bulk uncontrolled source to transfer reactive power to minimize the converter current and filter voltage harmonic. An instantaneous power based control algorithm is also implemented to regulate the AC output voltage and DC link voltage. The proposed scheme can be used efficiently for the electric vehicle (EV) to provide good voltage regulation charging the battery, and auxiliary effective brake torque during a wide speed range. Simulations are performed in Matlab/Simulink and the result verified the feasibility of the proposed approach.