Lub hauv paus ntawm kev sib nqus ua tau zoo: to taub txog DC B {{0} h nkhaus
Npe: Demystifying DC B {{0} h voj: Daim duab tseem ceeb rau cov ntaub ntawv sib nqus muag
Nyob zoo engineers thiab cov neeg tsim qauv,
Thaum xaiv cov khoom siv muag muag rau koj lub zog hloov dua siab tshiab, lub cev muaj zog tsim, lossis daim ntawv thov lub cev muaj zog, koj ua li cas tiag tiag yuav paub nws ua? Cov lus teb nyob hauv cov yam ntxwv tseem ceeb: tusDC B - h hysteresis nkhausCov. Qhov no tsis yog ib lub graph; Nws yog cov khoom siv caj ces cov lej rau kev sib nqus.
Dab tsi yog b - h nkhaus?
Xav txog kev thawb ib qho khoom ntawm qhov chaw ntxhib. Lub zog koj thov (h) thiab cov lus tsa suab (b) muaj kev sib raug zoo tshwj xeeb. Hauv cov hlau nplaum:
- H (Sib Nqus Teb Lub Zog Muaj Zog):Nov yog "lub laub," sib nqus sab nraud sib nqus siv rau cov khoom siv, ntsuas hauv kev amperes ib meter (a / m) lossis oerseds (OE). Nws yog qhov ua rau.
- B (Sib Nqus Flux ntom):Qhov no yog cov lus teb - tag nrho cov hlau nplaum flucetic tsis muaj nyob sab hauv nws, ntsuas hauv teslas (t) lossis gauss (g). Nws yog cov nyhuv.
B {{{0} hutve ib qho kev sib raug zoo no cov kev sib raug zoo, sib sau lub voj kaw uas qhia txhua yam.
Vim li cas lub voj no thiaj li tseem ceeb?
Cov duab thiab qhov loj ntawm lub voj hysteresis muab cov ntsuas kev ua tau zoo:
- Saturation flux ntom (BS):Lub ntsiab lus uas thov ntau h - teb tsis nce B. Qhov no txhais tau qhov muaj peev xwm loj ntawm cov khoom sib nqus. Txog siab - Cov ntawv thov fais fab, koj xav tau HIGH.
- Kev sib koom tes (HC):Tus nqi ntawm rov qab h - teb uas yuav tsum tau los txo b- teb rau xoom. Tus HC tsawg txhais tau tias cov khoom siv yooj yim demagnetized, uas yogtseem ceebrau cov ntaub ntawv muag khoom muag muag. Nws cuam tshuam ncaj qha rau cov tub ntxhais ploj, tshwj xeeb tshaj yog nyob hauv DC kev tsis ncaj ncees lossis hloov pauv.
- Permeability (μ):Qhov sib piv ntawm B rau H ({{{= b / h), uas qhia tias cov khoom siv hlau nplaum yooj yim. High permeability feem ntau yog thawj lub hom phiaj tsim qauv.
Nkag siab cov lus no los ntawm DC B {{0} h xeem tso cai rau koj kom paub qhov tseeb kev xaiv thiab ntau cov qauv tsim tau zoo, txhim khu kev qha.