【作者】 赵亮；

【导师】 李晓竹；

【作者基本信息】 辽宁工程技术大学 ， 电机与电器， 2009， 硕士

【摘要】 矿用电机车是煤矿井下的主要运输工具,其动力驱动系统的好坏直接关系到运行过程中的经济性和安全可靠性。针对我国目前矿用电机车直流调速系统故障率高、维护成本高,而交流串电阻调速系统能耗大、动态性能差,不能实现无级调速等问题,提出了基于直接转矩控制的矿用电机车交流调速系统方案。采用三相异步电机两相静止、旋转坐标系下的数学模型,论述直接转矩控制理论。详细的分析和研究了模糊自适应PID速度调节器的设计。利用定子电阻模糊观测器来在线估计定子电阻,解决了在低速范围内定子电阻辨识困难的问题。结合TMS320F2812 DSP芯片,给出了控制系统的软硬件设计思路,并运用Matlab/Simulink仿真软件对整个系统建模仿真。仿真结果表明,该控制系统能够满足煤矿井下的复杂运行环境。更多还原

【Abstract】 The mine electric locomotive is the main transport equipment in coal field. Its power drive system will have a direct bearing on the running of economy and safe reliability. To DC drive system mine electric locomotive for Chinese current failure rate is high, maintenance costs is high. To AC drive system energy consumption of AC series resistance is high, dynamic performance is poor. To deal with these problems, an advanced speed-adjusting scheme is presented based on AC speed control system by direct torque control.In the derivation of the two-phase stationary and rotating coordinate mathematical model for three-phase induction motor the basic principle of direct torque control is stated. Fuzzy self-adaptive PID speed regulator is designed by detailed analysis and research. Because the identification of the stator resistance within low speed range is difficult, using fuzzy observer does online estimation of stator resistance. The control system software and hardware design ideas is given based on TMS320F2812 DSP chip, and make use of Matlab/Simulink simulation software for modeling and simulation of the entire system. The simulation result shows that the control system can meet the coal mine complex operating environment.更多还原