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Research on the Control Principle of Series Excited DC Motor of Electric Car

Author: YaoZeSheng
Tutor: LeYuHan
School: Wuhan University of Technology
Course: Vehicle Engineering
Keywords: Electric vehicles The SACS DC motor Simulation model Double Closed Loop PWM
CLC: U469.72
Type: Master's thesis
Year: 2011
Downloads: 270
Quote: 3
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Abstract

With the social development and the improvement of living standards, the car has become a necessity for human life from a luxury to the automobile industry has been rapid development. Moreover, with the improvement of the human energy conservation and environmental protection requirements, the advantages of electric vehicles with its energy-saving, pollution-free, has become the world car manufacturers race to develop the industry, will lead the development of the automobile industry in the world. Currently, the major car manufacturers in order to be able to get a place in the field of electric vehicles in the future, competing to develop various types of electric vehicles, including pure electric vehicles, hybrid electric vehicles, fuel cell electric vehicles, and a considerable part of the model has been mass production, and sales performance in the market. Development depends on the development of the core technology of electric vehicles, namely battery to drive the development of electrical and electronic control systems. DC motor control simple and mature technology, torque / speed characteristics are more in line with the requirements of an ideal traction characteristics, and due to the series-wound DC motor has a high starting torque and overload capacity to meet the electric car fast start, acceleration, climb slope, frequent start / stop requirements, project selection series excited DC motor as a driving source, and independent research and development of a series-wound DC motor controller. The study focused on a series-wound DC motor control theory and control model, and a simple description of the hardware and software of the controller. This stage electric vehicles Research and technology research, the idea of ??electric vehicles converted motor matching theory. Principle and control method of DC motor control, and to develop a control strategy for the series-wound DC motor controller. The research series excited DC motor controller uses dual-loop speed control principle: the inner ring current negative feedback constitute a current loop to control the armature current and the current rate of change; outer ring using a speed ring speed negative feedback on the motor adjusting rotational speed. According to the actual parameters of the motor in the project, the establishment of a DC motor single closed-loop and double-loop speed system simulation model, and simulation results focus on analysis of double closed loop speed control system to follow the performance and anti-jamming performance results show that the dual closed loop control than single-loop control there is a strong superiority the startup performance of the electric vehicle can be improved. The particularity of the structure and performance of electric vehicles, motor controller function requirements definition. The overall design and analysis of electric vehicle controller, and its main hardware structure design, preparation of the double loop speed control module of the controller of the motor program, its major software modules. Finally, the controller loading, and combined with \feasibility and practicality.

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