交流接觸器制作為一個(gè)整體，外形和性能也在不斷提高，但是功能始終不變。
接觸器（圖4）
接觸器（圖4）
無論技術(shù)的發(fā)展到什么程度，普通的交流接觸器還是有其重要的地位。
空氣式電磁接觸器（英文：Magnetic Contactor）：主要由接點(diǎn)系統(tǒng)、電磁操動(dòng)系統(tǒng)、支架、接點(diǎn)和外殼（或底架）組成。
因?yàn)榻涣麟姶沤佑|器的線圈一般采用交流電源供電，在接觸器激磁之后，通常會(huì)有一聲高分貝的“咯”的噪音，這也是電磁式接觸器的特色。3TH40040XR1
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半導(dǎo)體接觸器：半導(dǎo)體接觸器是一種通過改變電路回路的導(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、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。
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直流電流與交流電流相比較，不存在周期性的電流數(shù)值過零點(diǎn)，因此，傳統(tǒng)接觸器開斷電路時(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觸點(diǎn)開關(guān)并聯(lián)在傳統(tǒng)直流接觸器觸頭上。這種無觸點(diǎn)的電力電子開關(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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