製zhi動dong電dian阻zu是shi不bu鏽xiu鋼gang電dian阻zu器qi的de一yi種zhong，主zhu要yao用yong於yu變bian頻pin器qi控kong製zhi電dian機ji快kuai速su停ting車che的de機ji械xie係xi統tong中zhong，幫bang助zhu電dian機ji將jiang其qi因yin快kuai速su停ting車che所suo產chan生sheng的de再zai生sheng電dian能neng轉zhuan化hua為wei熱re能neng。

製動電阻的主要作用有：
　   1、保護變頻器不受再生電能的危害
        電dian機ji在zai快kuai速su停ting車che過guo程cheng中zhong
，由you於yu慣guan性xing作zuo用yong
，會hui產chan生sheng大da量liang的de再zai生sheng電dian能neng
，如ru果guo不bu及ji時shi消xiao耗hao掉diao這zhe部bu分fen再zai生sheng電dian能neng
，就jiu會hui直zhi接jie作zuo用yong於yu變bian頻pin器qi專zhuan用yong型xing製zhi動dong電dian阻zu，變bian頻pin器qi的de直zhi流liu電dian路lu部bu分fen
，輕qing者zhe，變bian頻pin器qi會hui報bao故gu障zhang，重zhong者zhe
，則ze會hui損sun害hai變bian頻pin器qi；製動電阻的出現，很好的解決了這個問題，保護變頻器不受電機再生電能的危害
；
       2、保證電電源網絡的平穩運行
        zhidongdianzujiangdianjikuaisuzhidongguochengzhongdezaishengdiannengzhijiezhuanhuaweireneng，zheyangzaishengdiannengjiubuhuifankuidaodianyuandianwangluozhong
，buhuizaochengdianwangdianyabodong，congerqidaolebaozhengdianyuanwangluodepingwenyunxingdezuoyong。