浅谈电动机保护器的保护原理及应用.doc

浅谈电动机保护器的保护原理及应用 摘要：电动机保护器作为拖动系统中的重要组成部分，对电动机的起动和运行中保护起着至关重要的作用。本文分析了电动机保护器保护及构成原理，并阐述了电动机保护器在发展过程中的应用及选择原则。 Abstract: the motor protector as an important part of drag system, starting and running of motor protection plays an important role. Motor protector to protect and composition principle are analyzed in this paper, and expounds the motor protector the application and selection principles in the development process. 关键词：电动机；保护器；保护原理；应用 Key words: electric motor; The protector; Protection principle; application 一、引言 First, the introduction 电动机是当前应用最广泛的动力设备，是其他机电设备的动力源泉，电动机正常的输出是其驱动的机电设备正常工作的前提，如今已被广泛应用于工农业、交通运输、国防等领域。电动机所带的负载种类繁多，且往往是整个设备中的关键部分，因而确保电动机的正常运行就显得十分重要。电动机保护器（电机保护器）是发电、供电、用电系统的重要器件，是跨行业、量大面广、节能效果显著的节能机电产品[1]。电动机保护器的作用是给电机全面的保护控制，在电机出现过流、欠流、断相、堵转、短路、过压、欠压、漏电、三相不平衡、过热、接地、轴承磨损、定转子偏心时、绕组老化予以报警或保护控制。如今电动机保护器几乎渗透到所有用电领域，在国民经济和节能事业中有着不可替代的重要地位和作用。 Is currently the most widely used electric motor power equipment, is other mechanical and electrical equipment power source, the output of the motor is normal is the precondition of its driving mechanical and electrical equipment normal work, now has been widely used in industry and agriculture, transportation, national defense and other fields. Motor with the load range, and is often a key part of the entire device, thus ensure the normal running of electric motor becomes very important. Motor protector, motor protector) is one of the important device, power generation, power supply and utilization system, is a cross-industry, enormous quantity wide, energy-saving effect is remarkable energy-saving mechanical and electrical products [1]. Motor protector role is of comprehensive protection for motor control, the motor show flow, owe flow, phase failure, locked-rotor, short circuit, overvoltage, undervoltage, electric leakage, three-phase unbalance, overheating, grounding, bearing wear, or when the rotor eccentricity, winding aging give alarm or protection control. Motor protector now permeates nearly all areas of