Yog vim li cas ncej tam sim no tshwm sim nyob rau hauv kab -Frequency Operated Motors

Ob qho tseem ceeb ua ntej rau tiam tam sim no yog qhov hluav taws xob thiab qhov hluav taws xob kaw. Ncej tam sim no tuaj yeem tsim tsuas yog thaum lub zog hluav taws xob muaj nyob nrog rau txoj hauv kev kaw. Tom qab ntawd vim li cas cov ncej hluav taws xob tawm hauv cov motors khiav ntawm lub zog muaj zog? Ob lub hauv paus mechanisms tsim cov ncej hluav taws xob nyob rau hauv cov tshuab tig: hloov cov hlau nplaum sib nqus thiab cov nqi zoo li qub.

Ncej voltage induced los ntawm alternating magnetic flux yog nruam thiab periodic. Nyob rau hauv ib txwm ua hauj lwm tej yam kev mob, lub cev muaj zog rotor rotates nyob rau hauv ib tug symmetrical sinusoidal alternating magnetic teb. Lub alternating electromotive force (EMF) induced raws li lub rotor txiav magnetic flux generates sib npaug alternating tam sim no, yog li tsis muaj asymmetrical voltage muaj nyob nruab nrab ntawm ob kawg ntawm lub rotor ncej nyob rau hauv zoo tagnrho scenarios. Txawm li cas los xij, qhov tsis sib haum sib nqus tsis sib haum tau muab faib ua ib puag ncig raws tus tub ntxhais stator tsim tsis sib npaug ntawm EMF, uas ua rau axially directed ncej voltage. Nyob rau hauv sib piv, ncej voltage stemming los ntawm static charge yog intermittent thiab non-periodic. Thaum lub sijhawm ua haujlwm ntawm lub cev muaj zog, kev sib txhuam ntawm cov txheej txheem cov dej ntim thiab cov khoom sib hloov ua kom zoo li qub ntawm lub rotor sib dhos; nruam nqi accumulation tom qab tsim ncej voltage.

Rau nruab nrab thiab loj AC motors, ib zaug ib tug conductive kaw voj ntaub ntawv hla lub rotor ncej voltage,ncej tam sim noyuav tshwm sim, featuring tus yam ntxwv ntawm tsawg voltage nrog high tam sim no. Cov ncej thiab bearing bushes yog sib cais los ntawm lubricating roj, nrog lub cev muaj zog bearings txhawb rau ib tug roj zaj duab xis. Muab qhov loj me me ntawm cov ncej hluav taws xob, cov roj insulating feem ntau nyob twj ywm yam tsis muaj kev puas tsuaj.

Thaum lub sij hawm siab -rotor tig ceev, cov roj nplua nyeem tsis zoo lossis cov roj tsis txaus ruptures thiab ua rau cov roj zaj duab xis, nqa cov ncej thiab bearing hav txwv yeem mus rau hauv cov hlau txuas ncaj qha. Ib lub voj voog kaw tam sim ntawd hla cov ncej voltage, ua rau qis -voltage breakdown. Lub resultant ncej tam sim no mus txog ob peb puas los yog txawm txhiab tus amperes instantaneously, txaus los hlawv tawm lub ncej ncej thiab bearing bushes.

Static charge generated los ntawm kev ua hauj lwm kev sib txhuam accumulates progressively ntawm lub ncej, tsis tu ncua elevating lub peev xwm raws li nws tsub. Kev tso tawm yuav tshwm sim tam sim ntawd yog tias lub rotating ncej ua rau kev sib cuag nrog ib qho chaw ruaj khov rau sab nraud. Yog hais tias tus ncej tseem nyob ib leeg los ntawm qhov tsis yog -rotating qhov chaw, tus nqi zoo li qub yuav txhim kho kom txog thaum muaj hluav taws xob ntau dhau. Thaum qhov hluav taws xob no dhau ntawm lub zog dielectric ntawm cov kabmob roj zaj duab xis, kev tawm sai sai tshwm sim thiab tsim tawmncej tam sim no.

Qhov tam sim no circulates los ntawm ib lub voj kaw uas tsim los ntawm lub rotating ncej, bearing puab nplhaib, bearing txheej nplhaib thiab bearing vaj tse. Qhov pom tseeb tshaj plaws tsis ua hauj lwm yog qhov me me, sib sib zog nqus ncig pitting corrosion ntawm cov ntawv xov xwm saum npoo thiab cov kabmob puab haiv neeg los ntawm hluav taws xob arcing tawm. Xws li pitting destabilizes roj zaj duab xis tsim thiab kev ncaj ncees, thiab ruins lub meej haum ntawm tus ncej thiab cov kabmob, ua rau cov kabmob inoperable. Nyob rau hauv cov xwm txheej hnyav, khaus hluav taws xob arcs tsim ntawm qhov chaw sib cuag ntawm cov ntawv xov xwm ncej thiab cov kabmob bushes vim hnyav.ncej tam sim no, ua rau muaj kev puas tsuaj loj rau cov khoom no. Qhov no ua rau lub cev muaj zog ntau dhau thiab lub suab nrov txawv txav, thaum kawg ua rau lub cev tsis tuaj yeem khiav ib txwm.