力士樂(lè)Rexroth6通徑HG線圈R901080794

電磁鐵
于兩個(gè)磁場(chǎng)互相疊加,從而使螺線管的磁性大大增強(qiáng)。為了使電磁鐵的磁性更強(qiáng),通常將鐵芯制成蹄形。但要注意蹄形鐵芯上線圈的繞向相反,一邊順時(shí)針,另一邊必須逆時(shí)針。如果繞向相同,兩線圈對(duì)鐵芯的磁化作用將相互抵消,使鐵芯不顯磁性。另外,電磁鐵的鐵芯用軟鐵制做,而不能用鋼制做。否則鋼一旦被磁化后,將長(zhǎng)期保持磁性而不能退磁,則其磁性的強(qiáng)弱就不能用電流的大小來(lái)控制,而失去電磁鐵應(yīng)有的優(yōu)點(diǎn)。
電磁鐵是可以通電流來(lái)產(chǎn)生磁力的器件,屬非*磁鐵,可以很容易地將其磁性啟動(dòng)或是消除。例如大型起重機(jī)利用電磁鐵將廢棄車輛抬起。
當(dāng)電流通過(guò)導(dǎo)線時(shí),會(huì)在導(dǎo)線的周圍產(chǎn)生磁場(chǎng)。應(yīng)用這性質(zhì),將電流通過(guò)螺線管時(shí),則會(huì)在螺線管之內(nèi)制成均勻磁場(chǎng)。假設(shè)在螺線管的中心置入鐵磁性物質(zhì),則此鐵磁性物質(zhì)會(huì)被磁化,而且會(huì)大大增強(qiáng)磁場(chǎng)。
一般而言,電磁鐵所產(chǎn)生的磁場(chǎng)與電流大小,線圈圈數(shù)及中心的鐵磁體有關(guān)。在設(shè)計(jì)電磁鐵時(shí),會(huì)注重線圈的分布和鐵磁體的選擇,并利用電流大小來(lái)控制磁場(chǎng)。由于線圈的材料具有電阻,這限制了電磁鐵所能產(chǎn)生的磁場(chǎng)大小,但隨著超導(dǎo)體的發(fā)現(xiàn)與應(yīng)用,將有機(jī)會(huì)超越現(xiàn)有的限制

力士樂(lè)Rexroth6通徑HG線圈R901080794

德國(guó)REXROTH力士樂(lè)線圈產(chǎn)品部分型號(hào)如下
線圈 R900071030  
線圈 R900071037 
線圈 R900723303
線圈 R900021389
線圈 R900019793
線圈 R900021562
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R900021267

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