描述

如果附近有直接啟動(dòng)的電動(dòng)機(jī)和電磁爐等設(shè)備，為防止這些設(shè)備投入時(shí)造成的電壓降低，其電源應(yīng)和變頻器的電源分離，減小相互影響。

對(duì)于要求瞬時(shí)停電后仍能繼續(xù)運(yùn)行的設(shè)備，除選擇合適價(jià)格的變頻器外，還應(yīng)預(yù)先考慮電機(jī)負(fù)載的降速比例。當(dāng)變頻器和外部控制回路都采用瞬間停電補(bǔ)償方式時(shí)，失壓回復(fù)后，通過(guò)測(cè)速電機(jī)測(cè)速來(lái)防止在加速中的過(guò)電流。

對(duì)于要求必須連續(xù)運(yùn)行的設(shè)備，應(yīng)對(duì)變頻器加裝自動(dòng)切換的不停電電源裝置。像帶有二極管輸入及使用單相控制電源的變頻器，雖然在缺相狀態(tài)，但也能繼續(xù)工作，但整流器中個(gè)別器件電流過(guò)大，及電容器的脈沖電流過(guò)大，若長(zhǎng)期運(yùn)行將對(duì)變頻器的壽命及可靠性造成不良影響，應(yīng)及早檢查處理。

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③General electric(通用電氣)系列產(chǎn)品》

④Westinghouse（美國(guó)西屋）系列產(chǎn)品》

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