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Research on the Controller of Four in-wheel Driven Electric Vehicles

Author: WangGuoMin
Tutor: TianShaoPeng
School: Wuhan University of Technology
Course: Power Machinery and Engineering
Keywords: Electric vehicles Electronic differential Wheel motor Performance Test
CLC: U469.72
Type: Master's thesis
Year: 2011
Downloads: 344
Quote: 0
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Abstract


In the case of the increasingly serious global energy and environmental issues, the electric car industry is increasingly attracted much attention. Wheel electric vehicles with its lightweight structure simple, all-wheel drive and good controllability by the high degree of concern. To-wheel electric vehicles for the study, theoretical analysis and simulation modeling of DC brushless hub motor, the depth wheel electric vehicle electronic differential control strategies and the controller, and the electronic differential control strategy simulation and optimization analysis also for the self-diagnostic system in detail. Electronic differential is one of the key technologies of the wheel electric vehicle drive system, with a chapter a comprehensive system modeling and simulation analysis. Four-wheel drive vehicles, the left and right wheel differential algorithm is more crucial four wheel drive vehicle no conventional differential, but rely on electronic differential controller algorithm rational allocation of the speed difference between the right and left wheels steering differential . The algorithm based on the steering angle sensor signal and the current speed to a rational allocation of the difference between the speed of the front and rear left and right wheels, prevent the steering swipe and drift phenomenon. The electronic differential is based on the torque distribution and the slip ratio combining electronic differential model the entire hub electric car control system structure is divided into two layers, the inner layer is the hub control system of the electric car, the outer control system is a steering wheel steering system, in order to achieve the allocation of four-wheel electric vehicle wheel torque and speed. The controller consists of two parts of the core control board and expansion board, expansion board from the power module, analog input and output, encoder signal processing circuit, TFT LCD display circuit, CAN and RS232 interface circuit, SD card storage circuit. Parameters of the accelerator opening degree, the rotational speed, torque, gear, vehicle speed, voltage, current, and mileage, and can be displayed in the dashboard the PMW parameters to control the motor speed can also be adjusted in the display data in the display refresh in real time . The final chapter described in detail based on the performance test systems the graphic language LabVIEW and wireless transmission, to highlight the part of the development and design of wireless transmission and process control. The system uses wireless transmission systems and computer serial-wheel electric vehicle performance testing with real-time monitoring, the system has better precision and reliability.

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