变频器设计 - 图文

西安文理学院本科毕业设计

变频控制技术在风机电控系统中的应用

摘要：

随着我国经济的高速发展，微电子技术，计算机技术，自动化控制技术都得到了迅速发展，交流变频调速技术也已经进入了一个崭新的时代，其应用越来越光明。

变频器在交流拖动系统应用中呈现优良的控制性，可以实现软起动和无级调速，进行加减速控制，使电动机获得高性能，而且具有显著的节能效果。所以应用变频调速可以提高生产机械的控制精度、生产效率和产品质量，电动机交流变频调速技术是当今节电、改善工艺流程以提高产品质量和改善环境，推动技术进步的一种主要手段。

关键词：变频器 变频技术 调速控制 风机

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西安文理学院本科毕业设计

The application of Variable Frequency Speed-Control in the

system of electronic control for blower

Abstract：

With China's rapid economic development, microelectronics, computer technology, automatic control technology have been developing rapidly, AC variable frequency technology has entered a new era, more and more of its light.

Application of frequency converter in AC drive system exhibits excellent control, which can not only realize the soft starting ，stepless speed regulation, and speed control, to enable the motor to obtain high performance,but also can embrace remarkable energy conservation effect. So the application of variable frequency speed control can enhance the control precision ,efficiency and quality in production machinery. Nowadays,the motor VVVF technology is a main means to save electricity , improve product quality by updating the process of technics ,protect environment and promote technology.

Key words：converter frequency conversion speed control blower

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西安文理学院本科毕业设计

目录

第一章 绪论.................................................................................................................. 5

1.1选题的目的和意义.......................................................................................... 5 1.2本课题在国内外的研究状况及发展趋势...................................................... 5

1.2.1 变频技术的发展.................................................................................. 5 1.2.2国内变频器现状................................................................................... 5 1.3变频器的应用.................................................................................................. 6

1.3.1节能调速............................................................................................... 6 1.3.2特大容量和极高转速的交流调速....................................................... 6 1.3.3交流调速装置应用时注意事项........................................................... 7 1.4本课题主要研究的内容.................................................................................. 7 第二章 变频调速的基本概念及其作用原理............................................................ 8

2.1变频器的概念及组成...................................................................................... 8

2.1.1变频器的概念....................................................................................... 8 2.1.2变频器的组成....................................................................................... 8 2.2变频调速传动的特点...................................................................................... 9 2.3变频器的工作原理.......................................................................................... 9 2.4变频器调速原理............................................................................................ 10 第三章 变频器的选型.............................................................................................. 11

3.1变频器选型的依据........................................................................................ 11 3.2本次课题所选的变频器及其参数................................................................ 11 3.3ATV71的相关特性 ........................................................................................ 12 3.4变频器运行特性............................................................................................ 14

3.4.1转矩特性(典型曲线) .......................................................................... 14 3.4.2开环应用............................................................................................. 14 3.4.3闭环应用............................................................................................. 15 3.4.4电机热保护......................................................................................... 16 3.5变频器附件选型............................................................................................ 16

3.5.1电机电抗器......................................................................................... 16 3.5.2变频器远程显示终端......................................................................... 16

第四章 电气组件的选择.......................................................................................... 18

4.1本次课题所选电气组件................................................................................ 18 4.2具体选型的依据............................................................................................ 18

4.2.1空气断路器（1QA） ......................................................................... 19 4.2.2熔断器（1FU1-3） ............................................................................ 19 4.2.3热过载继电器的选择......................................................................... 19

第五章 控制原理图设计.......................................................................................... 20

5.1变频器控制原理图........................................................................................ 20 5.2控制回路操作说明........................................................................................ 23

5.2.1变频运行............................................................................................. 23 5.2.2变频故障转工频................................................................................. 23

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西安文理学院本科毕业设计

5.2.3工频运行............................................................................................. 23 5.3变频器布线方式............................................................................................ 23 5.4变频器的接地................................................................................................ 24 第六章 变频器基本参数的设定.............................................................................. 25

6.1出厂设置........................................................................................................ 25 6.2频率限制........................................................................................................ 25 6.3电机参数........................................................................................................ 25 6.4加减速时间.................................................................................................... 25 6.5控制方式........................................................................................................ 25 6.6变频器启动方式............................................................................................ 25 6.7信号给定方式................................................................................................ 25 6.8保护参数设定................................................................................................ 26 6.9变频器I/O设置 ............................................................................................ 26 第七章 常见故障分析.............................................................................................. 26

7.1过流故障........................................................................................................ 26 7.2过载故障........................................................................................................ 27 7.3欠压................................................................................................................ 27 结束语.......................................................................................................................... 27 致谢.............................................................................................................................. 28 参考文献...................................................................................................................... 29 附录一.......................................................................................................................... 30

英文文献：Frequency Variation Speed Control ................................................. 30 附录二.......................................................................................................................... 38

中文翻译：变频技术.......................................................................................... 38

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