保护油风机系统变频器改造.docVIP

维修电工技师职业资格考评论文 保护油风机系统变频器改造 作 者 陆静海 工作单位 南京依维柯汽车有限公司 2013年7月 维修电工技师职业资格考评论文 保护油风机系统变频器改造 作 者 陆静海 职业资格鉴定等级 技师 工作单位 南京依维柯汽车有限公司 单位地址 南京玄武区黑墨营路100号 指导老师 姜平 2013年7月 目 录 摘要······················································1 关键词····················································1 前言······················································1 1. 改造前风机运行现状·····································2 2. 改造准备···············································2 2.1 三相异步电动机的起动································2 2.2 变频器的选型········································3 2.3 变频器的保护功能····································4 3. 系统工作原理···········································5 3.1 工作原理图··········································5 3.2 工作原理图说明······································5 4. 变频器调试·············································7 4.1 现场安装与接线······································7 4.2 参数设置············································7 4.2.1 变频器运行的基本操作方法·························8 4.2.2 FR-F740-37K-CH变频器的参数设定··················8 4.3 改造后试运行·······································10 4.3.1 带电源空载测试（不接电机）······················10 4.3.2 带电机空载试运行·······························10 4.3.3 带载试运行·····································10 结束语···················································11 答谢词···················································11 参考文献·················································12 保护油风机系统变频器改造 摘 要：2011年保护油喷涂工位的风机循环系统出现故障，其中一台风机无法启动，经检查为电气控制系统中的软启动器损坏。考虑改造成本及功能扩展等因素，决定采用变频器代替原来的软启动器进行改造。改造后的控制系统保留了原来软起动功能，同时增加了变频调速功能，起到了节能降耗的作用。 关键词：三菱变频器 软启动装置 风机 前 言： 单位车间生产线上的保护油喷涂工位有一套风机循环系统,该系统主要由电气控制柜、电动机和鼓风机三部分组成。2011年该风机循环系统中一台风机出现故障无法启动，经检查是电气控制系统中软启动装置的控制模块损坏，因为无法修复而需要进行更换修复工作。原先系统中的软启动装置单台成本高、功能相对单一，该装置只在风机起动过程中进行软启动功能，考虑到改造成本及功能扩展性等影响因素，重新更换一台全新的软启动装置成本高，决定采用三菱公司的FR-F700系列变频器替换软启动装置进行改造。该系列变频器是专用于风机、水泵类