1、企业:控制网日期:2009-06-08领域:机器人点击数:1661李方园(1973-)男,浙江舟山人,毕业于浙江大学电气自动化专业,高级工程师,长期从事于变频器等现代工控产品的应用与研究工作。摘要:变频器过载的基本特征是电流虽然超过了额定值,但超过的幅度不大,并与过流故障有严格区分。本文将主要探讨变频器过载形成的原因及其处理办法,并以“水泵变频器过载”和“离心风机变频器过载”两个案例阐述了过载故障排除的步骤,最终得出电机与变频器的选型规律。关键词:变频器;过载故障;反时限曲线;电机参数Abstract: The basic feature of AC Inverters overload
2、fault is that the current is greater than the given value, but is only little greater. It has a strict difference from the overcurrent. This paper analyzes the causes of overload problem of the inverter , and some measurement to solve these problems. Finally, two examples of “pump inverter overloa
3、d” and “centrifugal fan inverter overload” are given to describe the processing steps for the overload troubleshooting, and meanwhile we give the selection rules of the motor and AC inverter.Key words: AC inverter; Overload fault; Inverse-time curve; Motor parameter1 前言 电动机能够旋转,但运行电流超过了额定值,称为过载。