1756-DH485
1756-DH485
1756-DH485
1.4變頻器干擾。
一是變頻器啟動(dòng)及運(yùn)行過(guò)程中產(chǎn)生諧波對(duì)電網(wǎng)產(chǎn)生傳導(dǎo)干擾，引起電網(wǎng)電壓畸變，影響電網(wǎng)的供電質(zhì)量；二是變頻器的輸出會(huì)產(chǎn)生較強(qiáng)的電磁輻射干擾，影響周邊設(shè)備的正常工作。
2 抗干擾的措施
2.1 電源干擾的抑制。
一般通過(guò)設(shè)置屏蔽電纜和PLC局部屏蔽及高壓泄放元件進(jìn)行保護(hù)。選用隔離性能較好的設(shè)備、選用優(yōu)良的電源、動(dòng)力線(xiàn)和信號(hào)線(xiàn)走線(xiàn)要更加合理等等，對(duì)電源變 壓器、中央處理器、編程器等主要部件，采用導(dǎo)電、導(dǎo)磁性良好的材料進(jìn)行屏蔽處理，以防止外界干擾信號(hào)的影響。電源調(diào)整與保護(hù):電源波動(dòng)造成電壓畸變或毛 刺，將對(duì)PLC及I/O模塊產(chǎn)生不良影響。對(duì)微處理器核心部件所需要的＋5V電源采用多級(jí)濾波處理，并用集成電壓調(diào)整器進(jìn)行調(diào)整，以適應(yīng)交流電網(wǎng)的波動(dòng)和 過(guò)電壓、欠電壓的影響。盡量時(shí)電源線(xiàn)平行走線(xiàn)，時(shí)電源線(xiàn)對(duì)地呈低阻抗，以減少電源噪聲干擾。其屏蔽層接地方式不同，對(duì)干擾抑制效果不一樣，一般次級(jí)線(xiàn)圈不 能接地。輸入、輸出線(xiàn)應(yīng)用雙絞線(xiàn)且屏蔽層應(yīng)可靠接地，以抑制共摸干擾。此外可以安裝一臺(tái)帶屏蔽層的變比為1：1的隔離變壓器，以減少設(shè)備與地之間的干擾， 還可以在電源輸入端串接LC濾波電路等。
【公 司】： 福建鴻飛達(dá)自動(dòng)化科技有限公司
【主 營(yíng)】： AB(羅克韋爾)PLC全系列、ABB機(jī)器人系統(tǒng)備件、施耐德140/TSX、西門(mén)子6SN/6FC、伺服系統(tǒng)全套等
【價(jià) 格】： 電議
【發(fā)布人】： 程先生
【電 話(huà)】： 15306977024 13625073704
【所在地】： 福建 - 福州
【坐 機(jī)】： 0591-83532940
【Q Q】： 2851617309
【傳 真】： 0591-88263940
【郵 箱】： 2851617309@qq.com
產(chǎn)品價(jià)格以電話(huà)或者QQ詢(xún)價(jià)為準(zhǔn)，發(fā)布價(jià)格不做參考，圖片也一樣
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