Kev siv cov khoom siv hlau nplaum hauv kev lag luam tau pib thaum kawg ntawm lub xyoo pua puv 19. Nrog kev nce ntawm hluav taws xob hluav taws xob thiab kev sib txuas lus thev naus laus zis, cov pa roj carbon tsawg tau siv los tsim cov motors thiab transformers, thiab cov hmoov hlau zoo, hlau oxide, nplua hlau hlau, thiab lwm yam.
Cov khoom sib nqus ntawm cov khoom sib nqus mos
Saturation magnetic induction intensity bs: Nws qhov loj me yog nyob ntawm qhov muaj pes tsawg leeg ntawm cov khoom, thiab nws lub cev sib xws yog tias cov magnetization vectors hauv cov khoom yog txheej txheem zoo. Residual magnetic induction intensity br: yog tus yam ntxwv parameter ntawm lub voj hysteresis, tus nqi b thaum h rov qab mus rau 0. Squareness ratio: br∕bs Coercive force hc: Nws yog ib qho uas qhia qhov nyuaj ntawm magnetization ntawm cov khoom, thiab nyob ntawm seb muaj pes tsawg leeg thiab tsis xws luag ntawm cov khoom ( impurities, kev nyuaj siab, thiab lwm yam). Sib nqus permeability μ: yog qhov piv ntawm b rau h sib haum rau txhua qhov taw qhia ntawm lub voj hysteresis, uas yog ze rau lub xeev ua haujlwm ntawm lub cuab yeej. Initial permeability μi, siab tshaj permeability μm, sib txawv permeability μd, amplitude permeability μa, zoo permeability μe, thiab mem tes permeability μp. Curie kub tc: Lub magnetization ntawm ferromagnetic tshuaj txo qis thaum kub nce. Thaum qhov kub thiab txias tau mus txog, qhov kev sib nqus ntawm cov hlau nplaum ploj mus thiab dhau los ua paramagnetic. Qhov kub tseem ceeb yog Curie kub. Nws txiav txim siab qhov ntsuas kub siab tshaj plaws ntawm cov khoom siv hlau nplaum ua haujlwm. Loss p: hysteresis poob ph thiab eddy tam sim no poob pe p=ph plus pe=af plus bf2 plus c pe ∝ f2 t2 / , ρ txo, txoj kev hysteresis poob ph yog txo qis quab yuam hc; Txoj kev los txo eddy tam sim no poob pe yog Thinning lub thickness t ntawm cov khoom sib nqus thiab ua kom cov resistivity ρ ntawm cov khoom. Qhov poob ntawm cov tub ntxhais hauv huab cua dawb yog cuam tshuam nrog qhov kub thiab txias ntawm cov tub ntxhais xws li: Tag nrho lub zog dissipation (mw) / cheeb tsam (cm2)
