Design and implementation for regenerative braking system with ultra-capacitor

• Main Authors: Chun-Hsien Wu, 吳俊賢
• Other Authors: Kuen-Bao Sheu
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/7b87c3

碩士 === 國立虎尾科技大學 === 機械與機電工程研究所 === 98 === This research develops a hybrid/electric motorcycle regenerative braking system by integrating an ultra-capacitor module, a motor/generator module, and a bidirectional buck–boost DC/DC converter. The main objective of this system is to recycle vehicular kinetic energy in brake/restart process. As a quick reversible energy storage device, the ultra-capacitor can reduce battery size, extending lifespan of battery, and save the energy which is supposed to be abandoned in brake process. The energy-management strategy is executed by the bidirectional DC/DC converter for transforming energy between the power sources in boost and buck operating modes. In order to simultaneously control the current for extending lifespan of battery and keep the voltage within the constraint in the transform processes, an adaptive fuzzy sliding-mode controller (AFSMC) is developed to address this problem. Based on the dependency on current and voltage in the charge/discharge process, the need of differential operation in sliding surface for ultra-capacitor voltage can be released by introducing a new substitute sliding surface which consist of the current and the voltage in ultra-capacitor. Then a SISO fuzzy logic control is designed to control these SIMO systems, whose consequent parameters can be initialized at zero, and then adjusted by using an online parameters tuning algorithm derived from the Lyapunov stability theory. A comparative analysis with experimental results soundly confirmed that the regenerative braking system with ultra-capacitor has better dynamic performance and longer traveling distance while the performance of developed AFSMC is better than those of classical PID controllers.