基于Modelica异步电动机定子串电阻降压启动控制电路.doc

基于Modelica语言的异步电动机定子串电阻降压起动控制电路 摘要：本文是应用Modelica这一面向对象多领域语言对三相异步电动机定子串电阻降压起动控制电路进行的建模和仿真。三相异步电动机在直接起动过程中产生过大的起动电流，容易对整个电网造成影响。通常采用定子串电阻的方式降低电动机两端电压来解决这一难题。建模过程分为各组件的分别建模与各组件之间的逻辑连接建模。通过求解器对模型进行仿真计算，仿真结果表明：电动机直接启动过程中产生过大起动电流，电动机定子串电阻后起动电流明显减小，而且在启动过程平稳，该启动电路设备简单，对整个电路的保护与正常运行具有极其重要的意义。 关键字：Modelica，多领域面向对象语言，三相异步电动机，降压启动，定子串电阻，控制电路，模拟仿真 Stator Cascade Resistor Buck Starting Control Circuit for Induction Motor Based on Modelica Language Abstract: This paper focuses on the modeling and simulation of the three-phase asynchronous motor stator series resistance starting control circuit based on Modelica which is the object oriented multi domain language. Three-phase asynchronous motor in direct starting process produced a large starting current, and effected on the grid, using resistance of motor voltage on start is reduced to solve the problem. The modeling process is divided into the logical connection between each component and the component. By calculating the solver to simulate the model, the results show that motor start up directly generated in the process of large starting current, motor stator resistance after starting current is significantly reduced and at the start of the stationary process, simple equipment, on the whole circuit protection and normal operation has very important significance. Keywords: Modelica, Multi domain object-oriented language, Three-phase asynchronous motor, Buck start, Stator series resistor, Control circuit, Simulation 目 录 1.前言 1 1.1三相异步电动机减压启动的必要性 1 1.2三相异步电机减压启动常用方法 1 1.3Modelica语言概况 2 2异步电动机 3 2.1异步电动机结构 3 2.2异步电动机工作原理 4 2.3异步电动机的机械特性 4 3Modelica语言简介 6 3.1模型要素 6 3.1.1变量 6 3.1.2方程与算法 6 3.1.3连接 6 3.1.4类与类型 6 3.2建模功能 7 3.2.1面向对象建模 7 3.3方程 9 3.4算法 9 3.5Modelica模型库 9 4.建立异步电动机定子串电阻减压启动模型并分析 12 4.1异步电动机定子串电阻减压启动原理 12 4.2模型建立 13 4.3模型检测与仿真 22 4.4仿真结果 25 4.5仿真结果分析 26 5.结论 28 参考文献 29 感谢 30 1.前言 我们实际生活和生产过程中，通常为解决容量较大的电动机启动问题，采用减压启动方式启动电动机。电动机的减压启动方式有很多种，常用的有串电阻减压启动、Y-△减压启动等。这里，我们基于Modelica软件对异步电动机定子串电阻减压启动控制电路进行模拟仿真。 1.1三相异步电动机减压启动的必