變bian頻pin器qi製zhi動dong電dian阻zu是shi用yong於yu將jiang電dian動dong機ji的de再zai生sheng能neng量liang以yi熱re能neng方fang式shi消xiao耗hao的de載zai體ti，它ta包bao括kuo電dian阻zu阻zu值zhi和he功gong率lv容rong量liang兩liang個ge重zhong要yao的de參can數shu。製zhi動dong電dian阻zu主zhu要yao是shi用yong來lai消xiao耗hao伺si服fu電dian機ji製zhi動dong（急停）時產生的能量
，不然可能會燒壞驅動器。

 

 

 

 

變bian頻pin器qi帶dai動dong的de電dian機ji或huo其qi他ta感gan性xing負fu載zai在zai停ting機ji的de時shi候hou，一yi般ban都dou是shi采cai用yong能neng耗hao製zhi動dong的de方fang式shi來lai實shi現xian的de，就jiu是shi把ba停ting止zhi後hou電dian機ji的de動dong能neng和he線xian圈quan裏li麵mian的de磁ci能neng都dou通tong過guo一yi個ge別bie的de耗hao能neng元yuan件jian消xiao耗hao掉diao,從(cong)而(er)實(shi)現(xian)快(kuai)速(su)停(ting)車(che)。當(dang)供(gong)電(dian)停(ting)止(zhi)後(hou)，變(bian)頻(pin)器(qi)的(de)逆(ni)變(bian)電(dian)路(lu)就(jiu)反(fan)向(xiang)導(dao)通(tong)，把(ba)這(zhe)些(xie)剩(sheng)餘(yu)電(dian)能(neng)反(fan)饋(kui)到(dao)變(bian)頻(pin)器(qi)的(de)直(zhi)流(liu)母(mu)線(xian)上(shang)來(lai)，直(zhi)流(liu)母(mu)線(xian)上(shang)的(de)電(dian)壓(ya)會(hui)因(yin)此(ci)而(er)升(sheng)高(gao)，當(dang)升(sheng)高(gao)到(dao)一(yi)定(ding)值(zhi)的(de)時(shi)候(hou)

，變(bian)頻(pin)器(qi)的(de)製(zhi)動(dong)電(dian)阻(zu)就(jiu)投(tou)入(ru)運(yun)行(xing)，使(shi)這(zhe)部(bu)分(fen)電(dian)能(neng)通(tong)過(guo)電(dian)阻(zu)發(fa)熱(re)的(de)方(fang)式(shi)消(xiao)耗(hao)掉(diao)，同(tong)時(shi)維(wei)持(chi)直(zhi)流(liu)母(mu)線(xian)上(shang)的(de)電(dian)壓(ya)為(wei)一(yi)個(ge)正(zheng)常(chang)值(zhi)。

 

 

 

 

當(dang)伺(si)服(fu)電(dian)機(ji)製(zhi)動(dong)的(de)時(shi)候(hou)

，該(gai)伺(si)服(fu)電(dian)機(ji)處(chu)於(yu)發(fa)電(dian)狀(zhuang)態(tai)。這(zhe)意(yi)味(wei)著(zhe)能(neng)量(liang)將(jiang)會(hui)返(fan)回(hui)到(dao)伺(si)服(fu)驅(qu)動(dong)器(qi)的(de)直(zhi)流(liu)母(mu)線(xian)上(shang)。因(yin)為(wei)直(zhi)流(liu)母(mu)線(xian)包(bao)含(han)電(dian)容(rong)，所(suo)以(yi)直(zhi)流(liu)母(mu)線(xian)電(dian)壓(ya)會(hui)上(shang)升(sheng)。電(dian)壓(ya)增(zeng)加(jia)的(de)多(duo)少(shao)取(qu)決(jue)於(yu)開(kai)始(shi)製(zhi)動(dong)時(shi)電(dian)機(ji)的(de)動(dong)能(neng)以(yi)及(ji)直(zhi)流(liu)母(mu)線(xian)上(shang)電(dian)容(rong)的(de)容(rong)量(liang)。如(ru)果(guo)製(zhi)動(dong)動(dong)能(neng)大(da)於(yu)直(zhi)流(liu)母(mu)線(xian)上(shang)的(de)電(dian)容(rong)量(liang)，同(tong)時(shi)直(zhi)流(liu)母(mu)線(xian)上(shang)沒(mei)有(you)其(qi)他(ta)驅(qu)動(dong)器(qi)容(rong)納(na)該(gai)能(neng)量(liang)，那(na)麼(me)驅(qu)動(dong)器(qi)將(jiang)會(hui)通(tong)過(guo)製(zhi)動(dong)電(dian)阻(zu)來(lai)消(xiao)耗(hao)該(gai)能(neng)量(liang)，或(huo)者(zhe)將(jiang)其(qi)反(fan)饋(kui)給(gei)供(gong)電(dian)電(dian)源(yuan).

 

 

 

 

電dian機ji減jian速su時shi，過guo大da的de設she備bei慣guan量liang會hui將jiang電dian動dong機ji變bian成cheng發fa電dian機ji，這zhe是shi出chu於yu發fa電dian運yun行xing狀zhuang態tai
，電dian機ji反fan向xiang給gei變bian頻pin器qi供gong電dian
，這zhe會hui造zao成cheng變bian頻pin器qi過guo壓ya報bao警jing。為wei了le釋shi放fang這zhe部bu分fen能neng量liang

，采cai用yong增zeng大da電dian阻zu功gong率lv（適當減小電阻值）的(de)方(fang)法(fa)來(lai)實(shi)現(xian)的(de)。也(ye)有(you)采(cai)用(yong)可(ke)反(fan)向(xiang)供(gong)電(dian)到(dao)電(dian)源(yuan)回(hui)路(lu)的(de)，這(zhe)在(zai)共(gong)直(zhi)流(liu)母(mu)線(xian)的(de)變(bian)頻(pin)係(xi)統(tong)中(zhong)運(yun)用(yong)的(de)比(bi)較(jiao)多(duo)，可(ke)節(jie)能(neng)。製(zhi)動(dong)電(dian)阻(zu)和(he)發(fa)電(dian)效(xiao)果(guo)是(shi)一(yi)樣(yang)的(de)，可(ke)防(fang)止(zhi)變(bian)頻(pin)器(qi)減(jian)速(su)過(guo)壓(ya)
，減(jian)小(xiao)減(jian)速(su)距(ju)離(li)，提(ti)高(gao)動(dong)態(tai)性(xing)能(neng)。

 

電dian機ji內nei置zhi製zhi動dong器qi一yi般ban是shi做zuo最zui後hou停ting車che製zhi動dong的de
，而er不bu做zuo減jian速su製zhi動dong，這zhe和he電dian阻zu製zhi動dong是shi有you本ben質zhi區qu別bie的de，因yin為wei電dian阻zu製zhi動dong隻zhi有you電dian機ji減jian速su的de過guo程cheng中zhong有you作zuo用yong，在zai電dian機ji停ting止zhi後hou是shi沒mei有you效xiao果guo的de，必bi須xu采cai用yong刹sha車che才cai能neng讓rang電dian機ji保bao持chi靜jing止zhi（有位能負載）。

 

 

 

 

在(zai)變(bian)頻(pin)調(tiao)速(su)係(xi)統(tong)中(zhong)，電(dian)機(ji)的(de)降(jiang)速(su)和(he)停(ting)機(ji)是(shi)通(tong)過(guo)逐(zhu)漸(jian)減(jian)小(xiao)頻(pin)率(lv)來(lai)實(shi)現(xian)的(de)，在(zai)頻(pin)率(lv)減(jian)小(xiao)的(de)瞬(shun)間(jian)
，電(dian)機(ji)的(de)同(tong)步(bu)轉(zhuan)速(su)隨(sui)之(zhi)下(xia)降(jiang)
，而(er)由(you)於(yu)機(ji)械(xie)慣(guan)性(xing)的(de)原(yuan)因(yin)
，電(dian)機(ji)的(de)轉(zhuan)子(zi)轉(zhuan)速(su)未(wei)變(bian)。當(dang)同(tong)步(bu)轉(zhuan)速(su)小(xiao)於(yu)轉(zhuan)子(zi)轉(zhuan)速(su)時(shi)，轉(zhuan)子(zi)電(dian)流(liu)的(de)相(xiang)位(wei)幾(ji)乎(hu)改(gai)變(bian)了(le)180度
，電機從電動狀態變為發電狀態；yucitongshi，dianjizhoushangdezhuanjubianchenglezhidongzhuanju，shidianjidezhuansuxunsuxiajiang，dianjichuyuzaishengzhidongzhuangtai。dianjizaishengdediannengjingxuliuerjiguanquanbozhengliuhoufankuidaozhiliudianlu。youyuzhiliudianludediannengwufatongguozhengliuqiaohuikuidaodianwang
，jinkaobianpinqibenshendedianrongxishou，suiranqitabufennengxiaohaodianneng，dandianrongrengyouduanshijiandedianheduiji，xingcheng“泵升電壓”，使直流電壓升高。過高的直流電壓將使各部分器件受到損害。

 

因此在機械慣性比較大的係統中，需要采用製動電阻，如升降機
、數控機床
、提升機等

 

 

 

 

製動電阻的選型：動作電壓710V

 

1)電阻功率（千瓦）=電機千瓦數*(10%--50%)，