电机实际电流大于额定电流多少

当电动机运行功率达到额定功率(或额定电流)时，设备实际运行状态已超过额定机械设计功率(虽然设备不能表现出机械过载)。所以电动机运行在额定电流状态下是设备连续运行在超负荷状态下，此时电动机运行状态是不正常shi ji de dian liu hui da yu e ding dian liu ，re fu he chao guo she ji suo yun xu de fan wei ，ke neng hui dao zhi dian ji fa " ru he cai neng gu suan chu bian pin dian ji shi ji yun xing guo cheng zhong de dian liu da xiao ne ？ke yi cong yi xia gong shi （1 ）"

三相异步电动机的过载是指其在某个允许的时间内流过电机的电流超过额定电流。举个简单的例子，380v、7.5KW三相异步电机，额定电流15A，但在实际用中实际的电流会大于额定电流，热负荷超过设计所允许的范围，可能会导致电机发如何才能估算出变频电机实际运行过程中的电流大小呢？可以从以下公式（1）

san xiang yi bu dian dong ji de guo zai shi zhi qi zai mou ge yun xu de shi jian nei liu guo dian ji de dian liu chao guo e ding dian liu 。ju ge jian dan de li zi ，3 8 0v 、7 . 5 K W san xiang yi bu dian ji ，e ding dian liu 1 5 A ，dan zai shi ji yong zhong " dang dian dong ji yun xing gong lv da dao e ding gong lv ( huo e ding dian liu ) shi , she bei shi ji yun xing zhuang tai yi chao guo e ding ji xie she ji gong lv ( sui ran she bei bu neng biao xian chu ji xie guo zai ) 。suo yi dian dong ji yun xing zai e ding dian liu zhuang tai xia shi she bei lian xu yun xing zai chao fu he zhuang tai xia , ci shi dian dong ji yun xing zhuang tai shi bu zheng chang "