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ABB變流器  656S5001U2K1KV
ABB變流器 656S5001U2K1KV
產(chǎn)品價(jià)格:¥52
上架日期:2023-11-02 11:31:00
產(chǎn)地:進(jìn)口
發(fā)貨地:廈門(mén)
供應(yīng)數(shù)量:不限
最少起訂:1臺(tái)
瀏覽量:42
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詳細(xì)說(shuō)明
    制動(dòng)力矩計(jì)算要有足夠的制動(dòng)力矩才能產(chǎn)生需要的制動(dòng)效果,制動(dòng)力矩太小,變頻器仍然會(huì)過(guò)電壓跳閘。制動(dòng)力矩越大,制動(dòng)能力越強(qiáng),制動(dòng)性能約好。但是制動(dòng)力矩要求越大,設(shè)備投資也會(huì)越大。 制動(dòng)電流是指流過(guò)制動(dòng)單元和制動(dòng)電阻的直流電流。P――――電機(jī)功率P(kW)k――――回饋時(shí)的機(jī)械能轉(zhuǎn)換效率,一般k=0.7(絕大部分場(chǎng)合適用)I――――制動(dòng)電流,單位為安培計(jì)算得到I=P 制動(dòng)電流安培數(shù)=電機(jī)千瓦數(shù)即每千瓦電機(jī)需要1安培制動(dòng)電流就可以有100%制動(dòng)力矩制動(dòng)電阻計(jì)算和選擇(按100%制動(dòng)力矩計(jì)算)電阻值大小間接決定了系統(tǒng)制動(dòng)力矩的大小,制動(dòng)力矩太小,變頻器仍然會(huì)過(guò)電壓跳閘。電阻功率選擇是基于電阻能安全長(zhǎng)時(shí)間的工作,功率選擇不夠,就會(huì)溫度過(guò)高而損壞。380V標(biāo)準(zhǔn)交流電機(jī):P――――電機(jī)功率P(kW)k――――回饋時(shí)的機(jī)械能轉(zhuǎn)換效率,一般k=0.7(絕大部分場(chǎng)合適用)V――――制動(dòng)單元直流工作點(diǎn)
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