【摘要】 随着PC和PLC在电动机控制中的广泛应用,提出利用PC和PLC强大的数据处理功能,实现对电动机的监控和保护。通过对异步电动机各类故障特征的详细分析,提出了以序分量为基本保护判据、结合热积累和热发散模型,构成电动机综合保护的方案。该方案已经通过模拟实验,证明了其准确性和灵敏度。更多还原

【Abstract】 With the prevailing of PLC and PC in motor contr ol system, motor monit or and safeguard are benefit from powerful data processing ability of PC and PLC . Through the detail analysis of all kinds of failure features of asynchronous m otor, an integrated safeguard scheme of motor, which takes sequence component as basic safeguard criterion and combines heat accumulating and heat dissipation m odels, is presented. Its accuracy and sensitivity are proved through simulating experiments.更多还原