Vim li cas Silicon Steel siv hauv cov tshuab hluav taws xob?
Apr 30, 2024
Tso lus
Silicon steel yog cov khoom sib nqus mos uas siv hauv hluav taws xobfais fab mov transformers, motors thiab generators. Nws muaj cov ntsiab lus ntawm silicon siab txog li 3.2 pawg %, uas ua rau kom cov hluav taws xob tiv taus ntawm hlau thiab, yog li ntawd, txo qhov poob tam sim no. Grain-oriented silicon steel uas yog siv rau kev siv tsis-rotating, piv txwv li transformers, yog yus muaj los ntawm ib tug muaj zog nyiam crystallographic orientation. Hauv hlau cov lus qhia yooj yim tshaj plaws ntawm magnetization yog cov<001>siv lead ua cov lus qhia. Nyob rau hauv grain-oriented silicon steel lub Goss orientation, piv txwv li lub {110}<001>orientation, yog technologically pom tau hais tias yuav txo tau magnetic losses nyob rau hauv hluav taws xob transformers.
Kev ntxhib los mos thiab microstructure tswj hauv hluav taws xob steels
Grain-oriented silicon hlau(Fe-Si hlau;hlau transformer; hluav taws xob hlau) yog ib qho mos sib nqus polycrystalline metallic alloy uas yog siv los ua cov khoom tseem ceeb hauv hluav taws xob transformer cores thiab hluav taws xob motors.
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, los ntawm SiCl4 tshuaj vapor deposition kev kho mob kom txhawb cov laminations nrog Si tom qab tsim cov laminations. Feem ntau cov khoom lag luam muaj hluav taws xob yuav muaj nyob nruab nrab ntawm 3 thiab 4 wt% Si.
Kev ntxhib los mos thiab microstructure tswj rau kev siv hluav taws xob transformer
Rau daim ntawv thov transformer lub flux feem ntau nyob rau hauv qhov ntev ntawm lub laminations thiab yog li nws yog ntshaw kom txhim khu lub permeability nyob rau hauv cov kev taw qhia no. Qhov no yog ua tiav los ntawm ntau yam kub thiab txias dov theem los tsim cov ntawv textured, hu ua grain-oriented silicon-steel, nrog rau [001] kev taw qhia nyob rau hauv qhov ntev ntawm lub lamination. Cov<001>hom siv lead ua cov lus qhia yog cov lus qhia yooj yim ntawm magnetisation thiab li no cov permeability ntau dua. Yog li ntawd, hluav taws xob steels yog tus cwj pwm los ntawm kev hais lus Goss, piv txwv li a (110)<001>nyiam siv lead ua orientation.
Qhov cuam tshuam ntawm Goss kev ntxhib los mos rau hluav taws xob steels nyob rau hauv rooj plaub ntawm kev siv transformer
Txij li thaum<001>crystallographic cov lus qhia yog cov uas muaj cov lus qhia yooj yim tshaj plaws ntawm magnetisation thiab li no loj tshaj plaws permeability hluav taws xob steels haum rau transformer aplications yog yus muaj los ntawm ib tug pronounced Goss kev ntxhib los mos, piv txwv li a (110)<001>nyiam siv lead ua orientation txheeb ze rau lub ntsiab sib nqus tsim kev taw qhia ntawm lub transformer.
