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The Study and Development of Braking Energy Regenerative Technology for Micro Electric Car

Author: LiangLiYan
Tutor: QuJinYu
School: Shandong University of Technology
Course: Vehicle Operation Engineering
Keywords: Mini electric cars Brake energy recovery Super capacitor Simulation ECU
CLC: U469.72
Type: Master's thesis
Year: 2011
Downloads: 127
Quote: 1
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Abstract


Transportation and the sustainable development of the automotive industry is facing two major challenges: the problem of energy supply and environmental protection issues. The electric car can be an effective solution to the problem of energy consumption and environmental pollution, represents the future direction of development of the automotive industry, including micro electric cars are the future one of the new energy models, it is consistent with energy conservation and environmental protection and to meet the city in the short-haul travel requirements. However, the short driving range of electric vehicles cost-effective low-power battery and brake energy regeneration problems have become the bottleneck in the development of electric vehicles. Continued driving mileage for electric vehicles is short, the main problem facing electric vehicles battery performance is difficult to meet the requirements of the electric vehicle, brake energy recovery technology, the main contents include the following aspects: (1) Introduction electric vehicles and brake energy recovery status and trends based on the analysis of braking energy recovery influencing factors, brake energy recovery and super capacitor energy storage device, based excited DC motor drive system The super capacitor braking energy recovery of the overall program. (2) excited DC motor regenerative braking principle, the establishment of a regenerative braking circuit and mathematical models, and based on the mathematical model of of several regenerative braking control strategy to conduct a study to determine the constant feedback power regenerative braking control strategy and fuzzy PID control algorithm. (3) According to the braking energy recovery of the overall program, to constant feedback power control strategy of the braking energy recovery in MATLAB / SIMULINK environment simulation, simulation results demonstrate the reasonable control strategy can guarantee motor brake overload when not running, super capacitor charge simulation results show that the the ultracapacitor brake energy recovery system has a higher recovery of braking energy. (4) of regenerative braking control system hardware circuit design using C8051F005 microcontroller as the core of the control system design of the armature voltage half-bridge driver circuit, the microcontroller peripheral circuitry and the MOSFET driver circuit. Software development, including the main program, the interrupt service routine, regenerative braking modules and control algorithm module, in order to achieve the braking energy recovery function. Final debugging of system hardware and software to achieve the desired effect.

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CLC: > Transportation > Road transport > Automotive Engineering > A variety of automotive > Various energy vehicles > Electric vehicles
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