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ai820
ai820
直流电机的励磁方式不同,其接线方式也所不同。励磁方式主要有他励式和自励式两类,自励式又可分为并励式、串励式和复励式三种,直流电机4根线,先用万用表欧姆档量一下,应该是两两通。电阻大的是励磁绕组,用来加直流励磁电压的。电阻小的是运行绕组,加直流电压电机就转动。励磁和电枢的正负极先不用管,励磁电压和电枢电压通电运转,如果转的方向不对,你调换励磁电压的正负接头或电枢的正负接头,电机转动就能换向。
直流电机的接触器接线方式如下:
T1、T2为他励绕组;H1、H2为换向绕组。他励接法:T1、T2分别接供电正负极;H1、H2分别接供电正负极,并励接法:T1、H1接正极;T2、H2接负极。对调正负极换转向。
当接触器线圈通电后,线圈电流会产生磁场,产生的磁场使静铁芯产生电磁吸力吸引动铁芯,并带动交流接触器点动作,常闭触点断开,常开触点闭合,两者是联动的。
ai820
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