模糊自适应PID控制的异步电动机软起动器的研究.doc

模糊自适应PID控制的异步电动机软起动器的研究
陈忠华刘勋郭凤仪
(辽宁工程技术大学电气与控制工程学院辽宁葫芦岛 125105)
摘要:针对异步电动机直接起动过程中存在的问题,研究了一种基于模糊自适应PID控制的异步电动机转矩斜坡起动方式。通过异步电动机恒转矩负载机械特性的分析,推导出了转矩斜坡起动方式的数学模型。利用Matlab软件中的电气系统模块库和模糊逻辑工具箱,建立了基于模糊自适应PID控制的异步电机软起动系统的仿真模型,并进行了仿真。仿真结果表明恒转矩负载下模糊自适应PID控制的转矩斜坡软起动方式正确有效,可以有效地减小起动过程中对电网的冲击,降低了对拖动系统的不利影响,同时起动过程平稳。
关键词:异步电动机;软起动;模糊自适应PID;转矩斜坡;仿真
Research of Soft-staring for Asynchronous Motor with Self-adaptive Fuzzy PID Control
CHEN Zhong-hua, LIU Xun,GUO Feng-yi
(College of Electrical and Control Engineering of Liaoning Technical University, Huludao 125105, China)
Abstract: Considering the existing problems as asynchronous motor start up directly, this paper studys a torque slope start-up mode for asynchronous motor based on Self-adaptive fuzzy PID control. Through analysis of mechanical characteristics of asynchronous motor with constant torque, the paper establishes mathematic model of torque slope start-up mode for asynchronous motor based on Self-adaptive fuzzy PID control. In this paper, with the use of the power system blackest and the fuzzy logic toolbox in Matlab, the simulation model is built and simulink. The simulation results show that the soft-staring mode is correct and effective, reduces the shock to the work and the adverse effects on the drag system and make asynchronous motor start up very smoothly.
Keyword: asynchronous motor; soft-starting; self-adaptive fuzzy