A Novel Method of Electric Braking with Energy Recovery for Electric Vehicles

• Main Authors: Hong-lin Jhou, 周宏霖
• Other Authors: Kuo-kai Shyu
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/43736126480048780804

碩士 === 國立中央大學 === 電機工程研究所 === 96 === This thesis proposes a novel method of the electric braking with energy recovery for the brushless DC motor (BLDCM) of the electric vehicle (EV). The proposed method could convert the kinetic energy into the electric one to recover the battery during the braking period. Thus, the driving range of the EV can be increased by the energy recovery; furthermore, the safety and comfort of the driver can be improved by the electric braking. The proposed method could change the switching signals of motor driver to control the inverse torque during the braking period. Compared with the presented methods, the proposed solution achieves the goal of the energy recovery without additional converter or changing windings of the motor stator. In addition to the braking period, the period of release throttle is included in the energy recovery mechanism such that the EV has a similar function of the engine brake for the driving safety. Furthermore, the battery may be injured by the surge recovery current in the high speed duration. Therefore, the proposed strategy could control the current to protect the battery and provides a smooth and reliable brake. Finally, the feasibility of the proposed method is proven by simulation results and the driving range of the EV could be increased about 16% through the demonstration of experimental results.