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80年代后，各國(guó)研究交流接觸器電磁鐵的無(wú)聲和節(jié)電，基本的可行方案之一是將交流電源用變壓器降壓后，再經(jīng)內(nèi)部整流器轉(zhuǎn)變成直流電源后供電，但此復(fù)雜控制方式并不多見(jiàn)。
真空接觸器：真空接觸器是接點(diǎn)系統(tǒng)采用真空消磁室的接觸器。
半導(dǎo)體接觸器：半導(dǎo)體接觸器是一種通過(guò)改變電路回路的導(dǎo)通狀態(tài)和斷路狀態(tài)而完成電流操作的接觸器。
永磁接觸器：永磁交流接觸器是利用磁極的同性相斥、異性相吸的原理，用永磁驅(qū)動(dòng)機(jī)構(gòu)取代傳統(tǒng)的電磁鐵驅(qū)動(dòng)機(jī)構(gòu)而形成的一種微功耗接觸器。3TH40220XL2
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電路的裝置，所以經(jīng)常運(yùn)用于電動(dòng)機(jī)做為控制對(duì)象﹐也可用作控制工廠設(shè)備﹑電熱器﹑工作母機(jī)和各樣電力機(jī)組等電力負(fù)載，接觸器不僅能接通和切斷電路，而且還具有低電壓釋放保護(hù)作用。接觸器控制容量大，適用于頻繁操作和遠(yuǎn)距離控制,是自動(dòng)控制系統(tǒng)中的重要元件之一。
在工業(yè)電氣中，接觸器的型號(hào)很多，工作電流在5A-1000A的不等，其用處相當(dāng)廣泛
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另一半是活動(dòng)鐵芯，構(gòu)造和固定鐵芯一樣，用以帶動(dòng)主接點(diǎn)和輔助接點(diǎn)的閉合斷開(kāi)。
20A以上的接觸器加有滅弧罩，利用電路斷開(kāi)時(shí)產(chǎn)生的電磁力，快速拉斷電弧，保護(hù)接點(diǎn)。
接觸器可高頻率操作，做為電源開(kāi)啟與切斷控制時(shí)﹐高操作頻率可達(dá)每小時(shí)1200次。
接觸器的使用壽命很高，機(jī)械壽命通常為數(shù)百萬(wàn)次至一千萬(wàn)次，電壽命一般則為數(shù)十萬(wàn)次至數(shù)百萬(wàn)次。
技術(shù)發(fā)展
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3SU19010FS500AA0ZY11
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3SU19010FS700AA0ZY15
3SU19010FS700AA0ZY19
3SU19010FT000AA0
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3SU19010FT200AA0
3SU19010FT200AA0ZY10
3SU19010FT200AA0ZY11
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3SU19010FT200AA0ZY13
3SU19010FT200AA0ZY15
3SU19010FT200AA0ZY19
3SU19010FT300AA0
3SU19010FT300AA0ZY10
3SU19010FT300AA0ZY11
3SU19010FT300AA0ZY12
3SU19010FT300AA0ZY13
3SU19010FT300AA0ZY15
3SU19010FT300AA0ZY19
3SU19010FT400AA0
3SU19010FT400AA0ZY10
3SU19010FT400AA0ZY11
3SU19010FT400AA0ZY12
3SU19010FT400AA0ZY13
3SU19010FT400AA0ZY15
3SU19010FT400AA0ZY19
3SU19010FT500AA0
3SU19010FT500AA0ZY10
3SU19010FT500AA0ZY11
3SU19010FT500AA0ZY12
3SU19010FT500AA0ZY13
3SU19010FT500AA0ZY15
3SU19010FT500AA0ZY19
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3SU19010FT600AA0ZY10
3SU19010FT600AA0ZY11
3SU19010FT600AA0ZY12
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3SU19010FT600AA0ZY19
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3SU19010FT700AA0ZY11
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3SU19010FT700AA0ZY13
3SU19010FT700AA0ZY15
3SU19010FT700AA0ZY19
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3SU19500DM800AA0
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3SU19500DT800AA0
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3SU19500DX300AA0
3SU19500DX800AA0
3SU19500FA800AA0
3SU19500HJ100AA0
3SU19500HK100AA0
3SU19500HL100AA0
直流電流與交流電流相比較，不存在周期性的電流數(shù)值過(guò)零點(diǎn)，因此，傳統(tǒng)接觸器開(kāi)斷電路時(shí)，觸頭之間產(chǎn)生的電弧較為強(qiáng)烈，燃弧時(shí)間也比較長(zhǎng)，以便充分釋放電路中剩余的能量。電弧的燃燒產(chǎn)生高溫和強(qiáng)光，對(duì)觸頭表面有嚴(yán)重的燒蝕作用，觸頭材料在多次開(kāi)斷之后逐漸流失，觸頭電磨損嚴(yán)重時(shí)，導(dǎo)致直流接觸器報(bào)廢，不能開(kāi)斷電路。 [1]
電力電子技術(shù)得以迅猛發(fā)展，人們將電力電子元件應(yīng)用到直流接觸器中，巧妙的創(chuàng)造出一種混合式直流接觸器，使得直流接觸器向智能化、可控化邁進(jìn)了新的一步。這種混合式接觸器利用傳統(tǒng)直流接觸器在閉合導(dǎo)通狀態(tài)下觸頭接觸電阻小、導(dǎo)通壓降小的優(yōu)點(diǎn)，將由反并聯(lián)晶閘管和控制模塊單元共同組成的無(wú)觸點(diǎn)開(kāi)關(guān)并聯(lián)在傳統(tǒng)直流接觸器觸頭上。這種無(wú)觸點(diǎn)的電力電子開(kāi)關(guān)分?jǐn)嚯娐窌r(shí)不產(chǎn)生電弧，這就避免了傳統(tǒng)接觸器中電弧對(duì)觸頭材料的電磨損，也就大大增加了觸頭的使用壽命和可靠性。 [1]
直流接觸器永磁機(jī)構(gòu)
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