电机直流调速.doc

本科毕业设计论文双闭环可逆直流脉宽调速系统的设计和仿真学生姓名: 班级: 学号: 指导教师: 所在单位: 电气学院河南理工大学本科毕业设计论文 I 摘要直流调速系统具有调速范围广、精度高、动态性能好和易于控制等优点,所以在电气传动中获得了广泛应用。本文从直流电动机的工作原理入手,建立了双闭环直流调速系统的数学模型,并详细分析了系统的原理及其静态和动态性能。然后按照自动控制原理,对双闭环调速系统的设计参数进行分析和计算,利用 Simulink 对系统进行了各种参数给定下的仿真,通过仿真获得了参数整定的依据。在理论分析和仿真研究的基础上,本文设计了一套实验用双闭环直流调速系统,详细介绍了系统主电路、反馈电路、触发电路及控制电路的具体实现。对系统的性能指标进行了实验测试,表明所设计的双闭环调速系统运行稳定可靠,具有较好的静态和动态性能,达到了设计要求。采用 MATLAB 软件中的控制工具箱对直流电动机双闭环调速系统进行计算机辅助设计, 并用 SIMULINK 进行动态数字仿真,同时查看仿真波形,以此验证设计的调速系统是否可行. 关键词直流电机直流调速系统速度调节器电流调节器双闭环系统仿真河南理工大学本科毕业设计论文 II Abstract DC motor has been widely used in the area of electric drive because of its neatly adjustment, simple method and DC motor has been widely used in the area of electric drive because of its neatly adjustment, simple method and smooth control ina wide range, besides its control performance is excellent. Beginning with the theory of DC motor, this dissertation builts up the mathematic model of DC speed control system with double closed loops, detailedly discusses the static and dynamic state performance of the system. Afterward, according to automation theroy this papar calculates the parameters of the system. Then, this dissertation simulates and analyzes the system by means of Simulink. The results of simulation are consistent with theory calculation. Some experience was acquired through simulation. Based on the theory and simulation, this dissertation designs a DC speed control system with double closed loops, discusses the realization of main circuit, feedback circuit, control circuit and trigger circuit. The results of experiment show that the static and dynamic state performance of this system are good, which indicate that the design can meet the puter-aided analysis and design are carried out for speed-controlling system of the d-c motorby by using TOOL BOX and SIMULINK. Keywords: DC motor,DC governing system,speed governor,current governor,double loop control system,simulink 河南理工大学本科毕业设计论文 III 目录摘要...................................................