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產(chǎn)品簡介
ABB變流器  656S5001U2K1KV
ABB變流器 656S5001U2K1KV
產(chǎn)品價格:¥52
上架日期:2023-11-02 11:31:00
產(chǎn)地:進口
發(fā)貨地:廈門
供應(yīng)數(shù)量:不限
最少起訂:1臺
瀏覽量:42
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詳細說明
    制動力矩計算要有足夠的制動力矩才能產(chǎn)生需要的制動效果,制動力矩太小,變頻器仍然會過電壓跳閘。制動力矩越大,制動能力越強,制動性能約好。但是制動力矩要求越大,設(shè)備投資也會越大。 制動電流是指流過制動單元和制動電阻的直流電流。P――――電機功率P(kW)k――――回饋時的機械能轉(zhuǎn)換效率,一般k=0.7(絕大部分場合適用)I――――制動電流,單位為安培計算得到I=P 制動電流安培數(shù)=電機千瓦數(shù)即每千瓦電機需要1安培制動電流就可以有100%制動力矩制動電阻計算和選擇(按100%制動力矩計算)電阻值大小間接決定了系統(tǒng)制動力矩的大小,制動力矩太小,變頻器仍然會過電壓跳閘。電阻功率選擇是基于電阻能安全長時間的工作,功率選擇不夠,就會溫度過高而損壞。380V標準交流電機:P――――電機功率P(kW)k――――回饋時的機械能轉(zhuǎn)換效率,一般k=0.7(絕大部分場合適用)V――――制動單元直流工作點
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