The three-phase asynchronous electromotor auto
test system
【Abstract】Have analysed to the operation principle of the pilot system of the three-phase asynchronous electromotor auto test system and characteristic of controlling，Model S7-200 PLC which adopts German Simens Company is a controller，The PC by way of data manage、save data and pint part; Design its control system， including hardware circuit and software procedure，the mostly system is made up of PLC control system,computer manage data system and sensor system. In the system adopt the JN338 digital torque capacity revtransducer are extensive apply at the industry,the electric current of model,the temparature transducer of model Ni-1000 SOT. This design plan is rational dependa-bily is high,there is very good practicability.
This discourse is detailed analysis and describing each experi-
mental project of the three-phase asynchronous electromotor of test method and testing of the thesis automatically , in the test systems developed , Measurement precision and accuracy of data processing that the system has improved the electrical machinery and tested greatly , reduce experimental labour intensity and test period , reduce human factor impact on result .Realization PLC test automatically really intelligentize ,PC’s data processing and curve are drawn , and can produce the experiment report automatically .
【Keywords】PLC, transducer,auto test,data deal with computer
目录
摘要………………………………………………………………………………I
Abstract…………………………………………………………………………II
第1章 概述
1.1 电机型式试验简介………………………………………………1
1.2 电机测试标准……………………………………………………1
1.3 电机自动测试的特点……………………………………………2
1.4 课题的研究发展概况及意义……………………………………3
第2章 总体设计方案…………………………………………………………4
2.1 电机自动测试系统的主要组成…………………………………4
2.2 试验模块…………………………………………………………4
2.3 空载试验…………………………………………………………5
2.3.1 空载电流和空载损耗的测定……………………………5
2.3.2 试验结果的计算…………………………………………5
2.4 堵转试验…………………………………………………………5
2.4.1 数据读取…………………………………………………5
2.4.3 实验结果的计算…………………………………………5
2.5 负载试验…………………………………………………………6
2.6 温升实验…………………………………………………………7
2.7 转矩转速的测量……………………………………………………7
2.7.1 试验目的……………………………………………………7
2.7.2 试验过程……………………………………………………7
第3章 硬件设计………………………………………………………………9
3.1 PLC的发展情况…………………………………………………9
3.1.2 PLC的基本结构……………………………………………9
3.1.3 PLC的工作原理……………………………………………10
3.1.4 PLC的特点…………………………………………………12
3.1.5 PLC控制系统设计的基本原
则和一般步骤……………………………………………………12
3.2 传感器……………………………………………………………14
3.2.1 概念…………………………………………………………14
3.2.2 传感器的特性……………………………………………14
3.3 温度传感器…………………………………………………………15
3.3.1 概述…………………………………………………………15
3.3.2 特性…………………………………………………………15
3.4 转矩转速传感器……………………………………………………16
3.4.1 主要特性及参数……………………………………………17
3.4.2工作原理………………………………………………………19
3.4.3具体应用………………………………………………………21
3.5 电量变送器…………………………………………………………22
3.5.1 概述……………………………………………………………22
3.5.2 执行标准………………………………………………………22
3.5.3 主要技术指标…………………………………………………22
3.5.4 产品调试………………………………………………………23
3.5.5 安装……………………………………………………………23
3.6 通信系统的设计………………………………………………………25
3.6.1 概述………………………………………………………………25
3.6.2 RS-232的介绍……………………………………………………26
3.6.3 RS-485的介绍……………………………………………………26
3.6.4 DM485转换器……………………………………………………29
第4章 软件设计……………………………………………………………………34
4.1 主程序的编制……………………………………………………………34
4.2子程序的编制……………………………………………………………35
4.3 软件界面…………………………………………………………………37
结束语…………………………………………………………………………………40
参考文献………………………………………………………………………………41
致谢……………………………………………………………………………………42
