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變頻器制(zhi)動(dong)電(dian)(dian)阻(zu)(zu)是用(yong)于將電(dian)(dian)動(dong)機的(de)再(zai)生能量以熱能方式消耗的(de)載(zai)體，它包括電(dian)(dian)阻(zu)(zu)阻(zu)(zu)值和功(gong)率容量兩個重要的(de)參數。制(zhi)動(dong)電(dian)(dian)阻(zu)(zu)主要是用(yong)來消耗伺服(fu)電(dian)(dian)機制(zhi)動(dong)（急(ji)停）時(shi)產(chan)生的(de)能量，不然可能會燒(shao)壞驅動(dong)器。

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什么是(shi)變頻器制動電(dian)阻

變頻(pin)器(qi)(qi)(qi)帶動的(de)(de)電(dian)(dian)(dian)機或其他感(gan)性負(fu)載(zai)在停機的(de)(de)時(shi)候，一般都(dou)是采用能(neng)(neng)耗(hao)制動的(de)(de)方式(shi)來(lai)實(shi)(shi)現的(de)(de)，就(jiu)是把(ba)停止(zhi)后電(dian)(dian)(dian)機的(de)(de)動能(neng)(neng)和(he)線圈(quan)里面的(de)(de)磁能(neng)(neng)都(dou)通(tong)過(guo)一個別的(de)(de)耗(hao)能(neng)(neng)元(yuan)件消耗(hao)掉(diao),從而實(shi)(shi)現快速停車。當供電(dian)(dian)(dian)停止(zhi)后，變頻(pin)器(qi)(qi)(qi)的(de)(de)逆變電(dian)(dian)(dian)路就(jiu)反向導通(tong)，把(ba)這些剩余電(dian)(dian)(dian)能(neng)(neng)反饋(kui)到變頻(pin)器(qi)(qi)(qi)的(de)(de)直流(liu)母(mu)(mu)線上(shang)來(lai)，直流(liu)母(mu)(mu)線上(shang)的(de)(de)電(dian)(dian)(dian)壓會(hui)因此(ci)而升高(gao)(gao)，當升高(gao)(gao)到一定值(zhi)的(de)(de)時(shi)候，變頻(pin)器(qi)(qi)(qi)的(de)(de)制動電(dian)(dian)(dian)阻就(jiu)投入運行，使這部分電(dian)(dian)(dian)能(neng)(neng)通(tong)過(guo)電(dian)(dian)(dian)阻發(fa)熱的(de)(de)方式(shi)消耗(hao)掉(diao)，同(tong)時(shi)維持直流(liu)母(mu)(mu)線上(shang)的(de)(de)電(dian)(dian)(dian)壓為(wei)一個正常值(zhi)。

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