Ib zaug thaum pib ntawm ib puas xyoo dhau los hauv Tebchaws Meskas tau nrov tshaj tawm txog "tus qhev ntsiag to". Cov lus nug hais txog hluav taws xob, los yog theej, nws lub peev xwm ua ntsiag to ua ntau yam haujlwm. Lub Tuam Txhab General Electric tau nrhiav txoj hauv kev no kom nyiam cov neeg siv khoom siv hauv tsev. Tab sis yog tias peb kov cov txheej txheem ntawm lub cev ntawm hluav taws xob, nws hloov tawm tias nws tsis yog li "tsim". Ib qho piv txwv yog lub npe nrov transformer ntaus ntawv, uas muaj peev xwm ntawm emitting ib tug nrov hum. Yog vim li cas transformer buzzing?
YYuav ua li cas lub transformer ua haujlwm
Yuav kom nkag siab qhov no, nws tsis raug mob kom nco qab lub tsev kawm ntawv physics zaj lus qhia, uas piav txog lub hauv paus ntsiab lus ntawm transformer. Lub transformer ua haujlwm raws li txoj cai ntawm electromagnetic induction. Nws suav nrog cov coils raug mob nrog cov xaim ntawm cov kab sib txawv thiab nrog ntau tus lej sib txawv. Cov coils no sawv cev rau thawj thiab theem nrab windings ntawm transformer. Muaj kev sib txuas ntawm cov windings. Nws yog nqa tawm los ntawm kev siv lub nplhaib ua los ntawm cov hlau tshwj xeeb ferromagnetic. Lub nplhaib yog hu ua lub hauv paus thiab yog nyob rau hauv lub windings. Tus tsim nws tus kheejcore yog sib dhos los ntawm cov phaj nyias.
Thaum ib qho kev hloov pauv tam sim no siv rau thawj qhov cua, nws tsim ib qho chaw sib nqus hauv cov tub ntxhais. Daim teb no kuj hloov raws li txoj cai ntawm kev hloov ntawm qhov tam sim no uas tau tsim nws. Nyob rau hauv lem, lub teb induces ib tug induction EMF nyob rau hauv lub thib ob winding - ib tug hloov hluav taws xob tam sim no.
Cov khoom siv tseem ceeb tau muab faib ua ntau ntu. Nyob rau hauv txhua seem uas tsis muaj lub xub ntiag ntawm ib tug input voltage, nws muaj nws tus kheej magnetic teb, feem ntau qhia opposite rau txhua lwm yam. Txawm li cas los xij, nyob rau hauv qhov nro, txhua qhov ntws pib maj nrawm rau hauv ib qho kev taw qhia, tsim kom muaj cov hlau nplaum muaj zog. Tag nrho cov no yog nrog los ntawm kev hloov pauv ntawm lub cev qhov ntev ntawm lub hauv paus nws tus kheej. Tam sim no koj tuaj yeem twv yog vim li cas lub tshuab hloov pauv buzzing.
Magnetostriction effect
Vim lub teb yog qhov sib txawv, cov phiaj xwm tseem ceeb pib ntsws thiab ncab raws sijhawm nrog nws. Cov txheej txheem no hu ua magnetostriction. Cov kev txav no yog ua los ntawm qhov siab ntawm 100 Hz, ntawm qhov zaus tam sim no ntawm 50 Hz, ib qho kev vibration radiates rau hauv qhov chaw, uas muaj ntau yam audible thiab yog qhov txawv ntawm tib neeg pob ntseg. Ntxiv nrog rau tus qauv zaus, alternating tam sim no muaj ntau zaus harmonics. Muaj ntau ntawm lawv, ntau lub transformer yog loaded, thiab qhov no, nyob rau hauv lem, yog ib tug sharper thiab ntau audible vibration. Yog vim li cas lub transformer hums.
Lwm yam ua rau lub suab nrov transformer
Tab sis tsis yog txhua qhov laj thawj rau "kev hais lus" ntawm lub tshuab hloov pauv tau muab zais rau hauv magnetostriction. Vim li cas lub loaded transformer hum? Emit suab nrov:
- Transformer windings. Qhov no yog vim lub fact tias cov magnetic flux sim displace lub windings txheeb ze rau lub core. Lub suab nrov nrov hauv cov kab mob tsis zoo, yog tias lub lem tsis sib haum zoo.
- Core daim hlau. Vim li cas? Lub transformer hums feem ntau thaum lawv haum tsis zoo thiab muaj qhov sib txawv ntawm qhov chaw tiaj tus. Tom qab ntawd, ntxiv rau kev nyem, muaj suab nrov ntawm lub nplhaib hlau.
- Kev puas tsuaj lossis puas tsuaj rau lub rwb thaiv tsev ntawm cov hlau tooj liab. Qhov no tuaj yeem tshwm sim nyob rau hauv lub thickness ntawm winding qhov chaw siab kub tshwm sim. Nyob rau hauv cov ntaub ntawv no, lub txim yuav dhia ntawm windings, nrog rau ib tug nias. Qhov tso zis ntau zog, tus yam ntxwv thiab lub suab nrov dua.
- Txhua qhov xoob hauv qhov hloov pauv yog vim li cas? Lub transformer hums thaum ua haujlwm thaum lawv rattle.
Txhawm rau zam qhov tsis txaus ntawm cov hloov pauv no, cov tshuab tsis muaj suab nrov tau tsim. Lawv Circuit Court yog tsim nyob rau hauv xws li ib txoj kev uas tam sim no zaus hloov dua siab tshiab (nce) mus rau ib theem ntawm kev co tsis perceived nyob rau hauv lub suab ntau. Qhov no yog 10 kHz thiab siab dua. Silent transformers yog qhov me me thiab qhov hnyav dua li cov pa.
Zoo kawg
Txhawm rau kom tsis txhob nug koj tus kheej cov lus nug ntawm vim li cas lub tshuab hloov pauv yog buzzing, tag nrho cov qauv muaj zog yuav tsum tau coj los ntawm cov khoom lag luam zoo, muaj npe nrov. Cov uas tsis muaj zog yog tsis xav tau ntawm qhov tseeb ntawm kev tua. Tab sis yog tseem muajlub transformer ua suab nrov thaum lub sijhawm ua haujlwm, koj tuaj yeem sim tshem tawm nws los ntawm kev zawm daim hlau nrog screws. Tsuas yog sim tsis txhob overdo nws thiab tsis delaminate cov tub ntxhais hlau. Yog tias tsis muaj bolts, siv cov kua roj vanish lossis kua nplaum, uas yog nchuav rau hauv cov tub ntxhais. Winding rattle tsuas yog tshem tawm los ntawm kev rov ua dua lawv.
