Cén fáth a úsáidtear cruach sileacain i meaisíní leictreacha?

Cén fáth a úsáidtear cruach sileacain i meaisíní leictreacha?

Tá cion ard sileacain de thart ar 3.2 mais % aige, rud a mhéadaíonn friotachas leictreach iarainn agus, dá bhrí sin, laghdaítear caillteanais srutha eddy. Is sainairíonna é cruach sileacain gráin-dhírithe a úsáidtear le haghaidh feidhmeanna neamh-rothlach, ie claochladáin, le treoshuíomh criostalagrafach tosaíochta láidir. In iarann ​​is iad na treoracha is fusa maighnéadaithe<001>treoracha criostail. I cruach sileacain atá dírithe ar ghrán tá treoshuíomh Goss, .i. {110}<001>treoshuíomh, réadaithe go teicneolaíochta chun caillteanais maighnéadacha i gclaochladáin leictreacha a íoslaghdú.

Cruach sileacain atá dírithe ar ghráin(cruach Fe-Si;cruach claochladán; cruach leictreach) atá amaighnéadach bogcóimhiotal miotalach polycrystalline a úsáidtear mar ábhar lárnach i gcroíthe claochladán leictreach agus mótair leictreacha.

In the power industry electrical voltage is almost always AC and has a rather low frequency, namely, 50-60 Hz. At these frequencies electrical eddy currents are generated in the transformer core. Alloying the Fe with Si has a large marked effect on the electric resistivity of the material, with an increase of a factor of 4 for 3wt%Si. Silicon also has the effect of reducing the magnetostriction (i.e. length change on magnetisation) and the magnetocrystalline anisotropy. In addition, the material is used in the form of laminations, typically 0.3 to 0.7mm thick. The addition of too much silicon makes the material extremely brittle and difficult to produce, giving a practical limitation of 4wt% to the amount of Si that can be added. Recently, a technique has been developed to produce laminations with >6wt% Si, trí chóireáil sil-leagan ceimiceach SiCl4 chun na laminations a shaibhriú le Si tar éis na laminations a fhoirmiú. De ghnáth beidh idir 3 agus 4 wt% Si i bhformhór na steels leictreacha atá ar fáil go tráchtála