ZJ112卷接机组电机电流采集系统的设计

Design of motor current data acquisition system for ZJ112 cigarette maker

为降低ZJ112卷接机组电机故障率,采用电流互感器、模数转换、总线通讯等技术,设计了一种电机电流采集系统。该系统主要由传感器、信号转换单元、信号采集与数据处理单元、上位机4部分组成,在生产中分别采集各电机的电流值,通过以太网将电流数据传送到上位机,再通过Intouch写入Historian数据库,实现对电机电流的监控和超限报警。结果表明:(1)电流采集值与实际值的最大相对误差为1.56%,满足系统误差±2%的设计要求。(2)实现对MAX滤嘴切刀电机的在线监控,当负载变大时,电机电流逐渐增大,直至超限报警。该系统的应用有助于预测电机的使用情况,做好设备维修和保养工作。

To ensure reliable motor running in ZJ112 cigarette maker, a motor current data acquisition system was designed by adopting current transformer, analog-digital conversion and bus communication technologies.The system was mainly composed of sensors, a signal conversion unit, a signal acquisition and data processing unit, and a host computer. The acquired current data were transmitted to the host computer through Ethernet,then transcribed into a Historian database via Intouch to monitor the current of motor and realize overload alarming. The results showed that： 1） The maximum relative error between the current acquired value and actual value was 1.56%, less than allowable error range of ± 2%. 2） The filter cutting motor in MAX was online monitored, the motor current gradually increased with the rise of load until overload alarming. The system is helpful to the prediction of motor＇s running status and the maintenance work.