起重机大、小车行走驱动系统设计19433.doc

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1、课程设计报告书课程名称：《交流调速系统与变频器应用》课题名称：起重机大、小车行走驱动系统设计系部名称：自动控制系2011年12月20日目录第1章总括···············································11.1引言··························································11.2方案的选择····················································11.3设计目的、要求及设备·············

2、·····························2第2章控制系统电气原理····································32.1硬件电路设计··················································32.1.1系统连接图·················································32.2系统原理图····················································42.3变频器的参数及PLC的

3、I/O地址分配·····························5第3章PLC软件设计及程序调试····························63.1USS协议指令···················································63.1.1USS_INIT指令··············································63.1.2USS_CTRL指令·············································63.2PLC程

4、序设计··················································73.3程序的调试····················································7第4章力控组态的开发与调试·····································74.1力控组态的开发···············································74.2力控组态的调试·······································

5、········8第5章心得体会··················································9附录1·····························································10第1章总括1.1引言起重机的电机驱动主要有起升机构、大车、小车行走机构,电机主要采用绕线式异步电动机及鼠笼式异步电动机。起动时冲击电流大,设备冲击严重,噪声大,影响设备使用寿命及定位精度。近年来随着变频器技术发展,以其优越的起制动控制特性,在各种行业得到了广泛应用。在起重机中起升

6、机构采用变频器驱动后,可用鼠笼式异步电动机取代绕线式异步电动机。由于变频器驱动时,电机起动冲击电流小,转速变化非常平稳,起升、行走定位也较准确,提高了生产效率。1.2方案的选择根据起重机驱动的特性和技术有要求，采用带测速反馈接口的MM440系列变频器作为起升机构的电机驱动，MM440作为大、小车行走机构的电机驱动，MM440是一种通用型矢量控制变频器，功能强，价格低，能够充分满足行走机构的要求。起重机大车运行方向有前后，小车运行方向有左右要求，根据运行需要分为1-3档，采用一台三相异步电动机。起重机整个电气系统有S7-200系列PLC控制，

7、变频器通过开关量端子接受PLC控制信号。1.3设计目的、要求及设备设计目的：设计一个起重机大车和小车变频调速控制系统：大车两台电机，小车一台电机。电机速度选择均有高中低三档。控制大车两台电机的前后行驶，前后极限位置设有极限开关。控制小车电机的左右行驶，左右极限位置设有极限开关。设计要求：1、采用西门子S7-200PLC和MM440变频器。2、大车和小车高中低三段速度对应电机的供电频率分别为50Hz、40Hz和30Hz。3、要求就地和远程控制，采用力控组态软件进行远程控制。设计所需的设备：1.设计所需的硬件设备主要是实验室常用的实验设备，详见

8、（表1-1）。设计所需的硬件设备三相交流异步电动机（一台）西门子S7_200PLC西门子MM440变频器RS485通讯数据线实验平台的I/O数据点表1-12.设计所需的软件设备设