基于LM3108K的交流电动机堵转监控实验系统设计

Design of locked-rotor monitor experiment system for AC motors based on LM3108K

本设计针对实验室环境下,对小功率三相交流电动机堵转故障的检测和控制保护,提出了以和利时LM小型PLC LM3108K为核心的监控实验系统。该实验系统能够对小功率三相交流电动机的三相工作电流进行直接检测并结合8位LED显示模块提供参数显示。该实验系统采用磁粉制动器作为可调加载器模拟电机堵转故障环境。在模拟堵转发生时,由LM3108K控制小功率三相交流电动机及时断电,达到了良好的实验演示效果。

In this paper,a monitor experiment system for low power AC motors in lab based on LM PLC-LM3108 K for the sake of locked-rotor failure measurement and protection is provided.This experiment system can measure three-phase working currents of low power AC motors directly,combing with 8-Bit LED module for parameter display.For this experiment system,a magnetic powder brake is used as variable loader to generate locked-rotor failure.When the locked-rotor failure is happening,LM3108 K can shut down the low power AC motor immediately.Good expermental results have been achieued.