Energy Management of Regenerative Braking to Improve the Driving Range of Electric Vehicles
Date Issued
2006
Date
2006
Author(s)
Hu, Tsung-Hsien
DOI
zh-TW
Abstract
As the energy conservation and environmental protection concerns grow, the development of electric vehicle technology has been significant. The purpose of this research is to find a method to improve the efficiency of electric vehicles to extend driving range. In this thesis, the propulsion and energy management system of hybrid power sources, electric gearshift, and regenerative braking systems are integrated and implemented in an electric vehicle. The strategy of energy management gear shift timing, optimal driving current waveform, and energy regenerative braking control method are embedded in a control core, which is realized by a field programmable gate array(FPGA). Also proposed is a novel regenerative braking method via the inherent configuration of motor windings and their corresponding electronic switches. Therefore, the combination of variable windings and ultracapacitor is the major structure of regenerative braking system. The gross efficiency of electric vehicle is observed by the performance test of driving range according to the ECE47(CNS3105) standard. The experimental results show that the energy usage efficiency of ultracapacitor is as high as 97.5%. Besides the regenerative braking system extends the driving range by 19.91%. The gross efficiency of electric vehicle is also improved with 70% at 30km/hr of low speed gear as well as at 50km/hr of high speed gear.
Subjects
煞車回收能量管理
regenerative braking
energy management
SDGs
Type
thesis
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