Deceleration-based design auxiliary energy source for electric vehicle applications

This paper presents a new energy and power management control strategy for a battery hybrid electric vehicle (BHEV) based on speed and acceleration. The purpose of control strategy is to increase the ability of energy recapture during the vehicle deceleration and also to decrease the battery voltage regulation and peak power. The proposed system includes the propulsion system; because of supercapacitors (SCs) charging and discharging depend on the motoring or braking operations of the vehicle. The control strategy uses cascade voltage and current control of SCs in order to control the stored energy and power by tracking the vehicle speed and acceleration, taking the charging losses into account. The electrical drive system is simplified by a mathematical model and the core features of the control strategy have been presented. Numerical simulation demonstrates the effectiveness of the proposed control strategy in term of battery peak power reduction, energy saving and battery voltage regulation improvement compared to the ordinary battery electric vehicle (BEV). A small-scale electromechanical experiment tests made on a 2 quadrant DC motor drive coupled with the proposed system fully confirm the theoretical results