Acceleration-based control strategy and design for hybrid electric vehicle auxiliary energy source

Abstract

The paper presents a new control strategy and de- sign for auxiliary energy source (AES) used in battery hybrid electric vehicle (BHEV) based on the acceler- ation power. The control strategy takes actual speed and acceleration of the vehicle and system losses into account for regulating the energy and power supply to the propulsion load. The design of AES and its dy- namic control design are demonstrated. Cascade con- trol is availed in this work in order to control the ter- minal voltage and current of supercapacitors (SCs). The bene?ts of AES in which recapture of regener- ative braking energy are examined by the numerical simulation and veri?ed by a small scale experiment. The comparison of energy consumption and DC bus voltage regulation between pure battery and battery with supercapacitors (BSCs) propulsion system de- clares the theoretical results and con?rms the bene?ts of the proposed method.