Lub hauv paus ntsiab lus ua haujlwm ntawm peb yam khoom asynchronous lub cev yuav tsum yog:
Thaum symmetrical peb-lub sij hawm alternating tam sim no tau dhau mus rau peb-lub sij hawm stator winding, ib tug rotating magnetic teb yog generated uas rotates clockwise raws lub puab ncig qhov chaw ntawm lub stator thiab rotor ntawm ib tug synchronous ceev n1.Txij li thaum lub rotating magnetic teb rotates ntawm n1 ceev, lub rotor neeg xyuas pib nyob twj ywm nyob rau hauv thawj zaug, yog li ntawd tus neeg xyuas pib rotor yuav txiav lub stator rotating magnetic teb thiab tsim ib tug induced electromotive quab yuam (cov kev taw qhia ntawm induced electromotive quab yuam yog txiav txim los ntawm sab xis. txoj cai).Txij li thaum ob qho kawg ntawm tus neeg xyuas pib yog luv luv los ntawm lub nplhaib luv luv, nyob rau hauv qhov kev txiav txim ntawm induced electromotive quab yuam, ib tug induced tam sim no yuav raug generated nyob rau hauv lub rotor neeg xyuas pib uas yeej ib txwm ua raws li cov kev taw qhia ntawm induced electromotive quab yuam.Cov tam sim no-nqa conductors ntawm lub rotor yog ua raws li los ntawm electromagnetic rog nyob rau hauv lub stator lub magnetic teb (kev taw qhia ntawm lub zog yog txiav txim los ntawm sab laug tes txoj cai).Lub zog electromagnetic generates electromagnetic torque ntawm lub rotor ncej, tsav lub rotor kom tig raws cov kev taw qhia ntawm lub rotating magnetic teb.
Los ntawm kev soj ntsuam saum toj no, nws tuaj yeem txiav txim siab tias txoj haujlwm ua haujlwm ntawm lub cev muaj zog yog: thaum peb lub stator windings ntawm lub cev muaj zog (txhua lub sijhawm sib txawv ntawm 120 degrees hauv lub kaum sab xis hluav taws xob) tau muab nrog peb qhov hloov pauv tam sim no, rotating magnetic teb. yuav raug tsim tawm.Lub induced tam sim no yog generated nyob rau hauv lub winding (lub rotor winding yog ib tug kaw txoj kev).Lub rotor tus neeg xyuas pib tam sim no yuav tsim hluav taws xob hluav taws xob nyob rau hauv qhov kev txiav txim ntawm stator lub rotating magnetic teb, yog li tsim ib qho electromagnetic torque ntawm lub cev muaj zog ncej, tsav lub cev muaj zog tig, thiab lub cev muaj zog rotating magnetic teb.Tib txoj kev.
Yog vim li cas: 1. Yog hais tias ib los yog ob theem windings ntawm lub cev muaj zog raug hlawv tawm (los yog overheated), nws feem ntau yog tshwm sim los ntawm theem poob lag luam.Yuav tsis muaj qhov tob theoretical tsom ntawm no, tsuas yog piav qhia luv luv xwb.Thaum lub cev muaj zog poob ib theem vim li cas los xij, txawm hais tias lub cev muaj zog tseem tuaj yeem ua haujlwm txuas ntxiv mus, qhov nrawm poob qis thiab cov plam loj dua.Cov theem B thiab C dhau los ua kev sib raug zoo thiab txuas nrog rau theem A.Thaum lub load tseem tsis hloov, Yog hais tias tam sim no ntawm theem A loj heev, yog tias nws khiav mus ntev, lub winding ntawm theem no yuav inevitably overheat thiab hlawv tawm.Tom qab lub zog poob lawm, lub cev muaj zog tseem tuaj yeem khiav mus ntxiv, tab sis qhov ceev kuj tseem poob qis, cov plam loj dua, thiab tus nqi ntawm cov hlau nplaum txiav cov neeg xyuas pib nce.Nyob rau lub sijhawm no, B-theem winding yog qhib-circuited, thiab A thiab C theem windings ua nyob rau hauv series thiab dhau heev lawm tam sim no thiab mus sij hawm ntev kev khiav hauj lwm yuav ua rau lub ob-theem windings hlawv tawm tib lub sij hawm taw qhia ntawm no tias yog tias lub cev muaj zog nres tsis muaj ib theem ntawm cov khoom siv hluav taws xob thiab hloov mus, nws feem ntau tsuas yog ua suab nrov thiab tsis tuaj yeem pib.Qhov no yog vim hais tias symmetrical peb-theem alternating tam sim no muab rau lub cev muaj zog yuav tsim ib ncig rotating magnetic teb nyob rau hauv lub stator core.Txawm li cas los xij, thaum ib theem ntawm cov khoom siv hluav taws xob ploj lawm, ib qho kev sib nqus sib nqus ib zaug yog tsim nyob rau hauv stator core, uas tsis tuaj yeem ua rau lub cev muaj zog los tsim lub zog pib.Yog li ntawd, lub cev muaj zog tsis tuaj yeem pib thaum lub sijhawm fais fab tuag ploj lawm.Txawm li cas los xij, thaum lub sijhawm ua haujlwm, lub elliptical rotating magnetic teb nrog siab peb-theem harmonic Cheebtsam yog tsim nyob rau hauv cov huab cua sib txawv ntawm lub cev muaj zog.Yog li ntawd, lub cev muaj zog khiav tseem tuaj yeem khiav tom qab ib ntus poob, tab sis qhov chaw sib nqus yog distorted thiab cov teeb meem tam sim no nce sharply., nws thiaj li ua rau lub winding hlawv tawm.
Kev tiv thaiv kev sib raug zoo: Txawm hais tias lub cev muaj zog zoo li qub lossis tsis muaj zog, qhov cuam tshuam ncaj qha los ntawm kev ua haujlwm tsis zoo yog tias ib lossis ob theem windings ntawm lub cev muaj zog yuav overheat lossis hlawv tawm.Nyob rau tib lub sij hawm, lub overcurrent ua hauj lwm ntawm lub hwj chim cables accelerates rwb thaiv tsev laus.Tshwj xeeb tshaj yog nyob rau hauv lub xeev zoo li qub, qhov tsis muaj theem yuav tsim lub xauv rotor tam sim no ob peb zaug ntawm cov ntsuas tam sim no hauv lub cev muaj zog winding.Lub winding burnout ceev nrawm dua thiab hnyav dua li qhov poob siab thaum lub sijhawm ua haujlwm.Yog li ntawd, thaum peb ua txhua hnub txij nkawm thiab tshuaj xyuas lub cev muaj zog, peb yuav tsum ua txhua yam kev tshuaj xyuas thiab kev ntsuam xyuas ntawm MCC kev ua haujlwm ntawm lub cev muaj zog.Tshwj xeeb, kev ntseeg siab ntawm cov khoom siv hloov pauv, cov kab hluav taws xob, thiab cov kev sib txuas zoo li qub thiab muaj zog yuav tsum tau ua tib zoo xyuas.Tiv thaiv kom tsis txhob ua haujlwm poob.
Post lub sij hawm: Dec-04-2023
