3 theem induction lub cev muaj zog daim ntawv teev cov hluav taws xob lub cev muaj zog manufacturers hauv Is Nrias teb
Raws li deb ntawm induction lub cev muaj zog nws tus kheej muaj kev txhawj xeeb, kev pib ncaj qha tau tso cai, piv txwv li pib nrog qhov ntsuas hluav taws xob.
Vim tias lub peev xwm ntawm lub cev muaj zog tsis sib haum nrog lub peev xwm ntawm lub zog hluav taws xob uas nws txuas nrog, lub induction lub cev muaj zog yuav tsis pib vim qhov qis qis dhau ntawm cov kab hluav taws xob hluav taws xob poob thiab tsis txaus pib torque. Yuav kom daws tau qhov teeb meem no thiab txo qhov cuam tshuam rau lwm yam khoom siv hluav taws xob nrog tib lub tsheb npav, qee lub motors uas muaj peev xwm loj yuav tsum tau txais cov khoom pib los txwv qhov pib tam sim no thiab nws qhov cuam tshuam.
Txawm hais tias pib cov cuab yeej yuav tsum tau los yog tsis yog nyob ntawm kev sib piv ntawm cov khoom siv hluav taws xob thiab lub cev muaj zog. Qhov loj dua qhov chaw cog hluav taws xob lossis hluav taws xob muaj peev xwm, qhov loj ntawm lub cev muaj peev xwm tso cai rau pib ncaj qha. Yog li ntawd, nyob rau hauv lub tshiab-tsim nruab nrab thiab loj fais fab nroj tsuag, yuav luag tag nrho cov induction motors tshwj tsis yog lub qhov txhab hom yog pib ncaj qha. Tsuas yog nyob rau hauv lub qub thiab me fais fab nroj tsuag, motors pib los ntawm ntau yam pib cov khoom yuav pom tau.
Rau squirrel tawb motors, lub hom phiaj ntawm kev siv cov khoom pib yog los txo qhov pib voltage, thiaj li txo qhov pib tam sim no. Raws li kev sib txawv depressurization, txoj kev pib yog (1) y / △ conversion pib txoj kev. Thaum lub sijhawm ua haujlwm ib txwm muaj, lub cev muaj zog uas stator winding txuas nrog rau hauv cov duab delta txuas rau hauv Y zoo thaum pib, thiab tom qab ntawd hloov mus rau hauv kev sib txuas delta tom qab pib. (2) Pib nrog autotransformer. (3) Pib nrog reactor.
5. peb-theem winding ntawm lub cev muaj zog yog txuas rov qab los ntawm qhov kawg mus rau qhov kawg. Yuav ua li cas thaum pib? Kuv yuav nrhiav tau li cas?
Teb: peb-theem winding thiab ib-theem winding ntawm lub cev muaj zog txuas rov qab, yog li thaum pib:
(1) Yooj yim pib.
(2) Ib theem tam sim no loj.
(3) Kev vibration tuaj yeem tshwm sim thiab ua rau lub suab nrov.
Txoj kev tshawb nrhiav dav dav yog:
(1) Ua tib zoo xyuas peb-theem winding lub taub hau thiab tus Tsov tus tw.
(2) Txheeb xyuas qhov polarity ua ntu zus ntawm peb-theem winding. Yog tias n thiab s tsis staggered, nws txhais tau hais tias ib theem winding yog txuas rov qab.
6. Vim li cas tsis tuaj yeem ua ib theem ntawm stator winding ntawm induction lub cev muaj zog pib thaum nws raug txiav?
Teb: rau peb-theem lub hnub qub txuas nrog stator winding, thaum ib theem raug txiav, lub cev muaj zog yuav nyob ntawm cov kab hluav taws xob nrog tsuas yog ob theem kab txuas nrog lub hwj huam mov, tsim ib lub voj voog thiab ua haujlwm ib zaug.
Thaum lub sijhawm ua haujlwm ib-theem, yuav muaj cov xwm txheej hauv qab no: qhov qub nres hluav taws xob tsis tuaj yeem pib, thiab "tsis" ua suab nrov. Tej zaum nws tuaj yeem tig maj mam los ntawm manually rub lub rotor ncej. Lub cev muaj zog tig qeeb qeeb, qhov tam sim no nce, thiab lub cev muaj zog ua kom sov los yog kub hnyiab.
3 theem induction lub cev muaj zog daim ntawv teev cov hluav taws xob lub cev muaj zog manufacturers hauv Is Nrias teb
1. Yuav ua li cas yog qhov kub tsis kam ntawm insulating cov ntaub ntawv faib?
A: Tuam Tshoj tam sim no tau muab faib ua rau qib, xws li a, e, B, F, h thiab C.
(1) Qhov siab tshaj plaws tso cai ua haujlwm kub ntawm chav kawm cov khoom siv insulating yog 105 ℃
(2) Qhov siab tshaj plaws ua haujlwm kub ntawm chav kawm E cov khoom siv insulating yog 120 ℃
(3) Qhov siab tshaj plaws ua haujlwm kub ntawm chav kawm B insulating yog 130 ℃
(4) Qhov siab tshaj plaws ua haujlwm kub ntawm chav kawm F insulating cov khoom yog 155 ℃
(5) Qhov siab tshaj plaws ua haujlwm kub ntawm chav kawm H insulating khoom yog 180 ℃
(6) Qhov siab tshaj plaws ua haujlwm kub ntawm chav kawm C insulating cov khoom yog siab dua 180 ℃.
2. piav qhia luv luv txog cov qauv thiab kev ua haujlwm ntawm induction motor.
Teb: lub hauv paus ntsiab lus ua hauj lwm ntawm lub induction motor yog raws li nram no: thaum peb-theem stator winding dhau los ntawm peb-theem symmetrical AC tam sim no, ib tug rotating magnetic teb yog generated. Lub rotating magnetic teb rotates nyob rau hauv lub stator bore. Nws txoj kab sib nqus ntawm kev quab yuam txiav cov hlau ntawm lub rotor thiab induces tam sim no nyob rau hauv lub rotor hlau. Vim hais tias kev sib cuam tshuam ntawm stator magnetic teb thiab rotor tam sim no tsim hluav taws xob torque, stator rotating magnetic teb rub lub rotor nrog tam sim no nqa xov hlau tig.
3. yog vim li cas tam sim no siab thaum lub induction motor pib? Thiab tam sim no yuav txo qis tom qab pib?
Teb: Thaum lub induction lub cev muaj zog nyob rau hauv lub xeev nres, los ntawm ib tug electromagnetic taw tes ntawm view, nws zoo li ib tug transformer. Lub stator winding txuas nrog lub hwj huam mov yog sib npaug rau thawj kauj ntawm lub transformer, thiab kaw rotor winding yog sib npaug rau theem nrab ntawm lub transformer uas yog luv luv circuited; Tsis muaj hluav taws xob sib txuas ntawm stator winding thiab rotor winding, tsuas yog sib nqus sib txuas. Qhov sib nqus flux raug kaw los ntawm stator, huab cua sib txawv thiab rotor core. Thaum lub sijhawm kaw, lub rotor tsis tau tig los ntawm inertia, thiab lub rotating magnetic teb txiav lub rotor winding ntawm qhov siab tshaj plaws txiav ceev - synchronous ceev, yog li ntawd lub rotor winding induces lub siab tshaj plaws muaj peev xwm. Yog li ntawd, ib tug loj tam sim no ntws los ntawm lub rotor neeg xyuas pib, uas generates magnetic zog rau offset lub stator magnetic teb, ib yam li lwm yam sib nqus flux ntawm lub transformer offsets thawj magnetic flux.
Txhawm rau tswj hwm tus thawj sib nqus flux sib raug rau cov khoom siv hluav taws xob tam sim no, stator cia li nce qhov tam sim no. Lub sijhawm no, lub rotor tam sim no loj heev, yog li cov stator tam sim no kuj nce siab heev, txawm tias mus txog 4 ~ 7 npaug ntawm qhov ntsuas tam sim no, uas yog vim li cas rau qhov loj pib tam sim no.
Yog vim li cas nws yog me me tom qab pib: raws li lub cev muaj zog ceev nce, qhov ceev ntawm stator magnetic teb txiav lub rotor neeg xyuas pib txo, induced electromotive quab yuam nyob rau hauv lub rotor conductor txo, thiab tam sim no nyob rau hauv lub rotor conductor kuj txo, yog li ib feem. ntawm cov stator tam sim no siv los tiv thaiv kev cuam tshuam ntawm cov hlau nplaum flux generated los ntawm rotor tam sim no kuj txo, yog li cov stator tam sim no nce los ntawm loj mus rau me me kom txog thaum nws yog ib txwm.
4. Puas muaj qhov txaus ntshai ntawm qhov pib tam sim no? Vim li cas qee qhov induction motors xav tau cov khoom pib?
Teb: Feem ntau hais lus, vim hais tias cov txheej txheem pib tsis ntev, qhov loj tam sim no ntws nyob rau hauv ib lub sij hawm luv luv, thiab cov cua kub tsis dhau hnyav, lub cev muaj zog tuaj yeem tiv taus. Txawm li cas los xij, yog tias qhov pib ib txwm muaj kev puas tsuaj, piv txwv li, lub cev muaj zog pib nrog lub teeb lub teeb yuav tsum pib nrog cov khoom hnyav, thiab qhov ceev tsis tuaj yeem nce ib txwm, lossis thaum qhov hluav taws xob qis, lub cev muaj zog tsis ncav cuag qhov ntsuas ceev. ntev, thiab lub cev muaj zog yog pib dua, lub cev muaj zog winding yuav overheat thiab hlawv tawm.
3 theem induction lub cev muaj zog daim ntawv teev cov hluav taws xob lub cev muaj zog manufacturers hauv Is Nrias teb
Loj pib tam sim no ntawm lub cev muaj zog yuav cuam tshuam rau lwm yam khoom siv hluav taws xob ntawm tib lub tsheb npav fais fab. Qhov no yog vim qhov loj pib tam sim no nkag mus rau lub cev muaj zog thiab lub zog loj poob ntawm cov kab hluav taws xob, uas txo qhov voltage ntawm lub tsheb npav txuas nrog lub cev muaj zog thiab cuam tshuam rau kev ua haujlwm ib txwm ntawm lwm yam khoom siv hluav taws xob, xws li lub teeb hluav taws xob. tsis nyob rau, lwm cov motors tsis tuaj yeem pib, thiab cov electromagnet tau tso tawm.
7. Dab tsi yog qhov txawv txav ntawm rotor bar tawg thaum lub sijhawm ua haujlwm ntawm squirrel tawb induction motor?
Teb: Thaum lub rotor bar ntawm squirrel tawb induction lub cev muaj zog yog tawg thaum lub sij hawm ua hauj lwm, lub cev muaj zog ceev yuav qeeb, lub stator tam sim no fluctuates ib ntus, thiab lub cev vibrates, uas yuav ua tau ib tug rhiab heev "buzzing" suab.
8. Dab tsi yog qhov txawv txav ntawm ib-theem grounding thaum lub sijhawm ua haujlwm ntawm stator winding ntawm induction motor?
Teb: rau 380V qis-voltage lub cev muaj zog, thaum nws txuas nrog qhov nruab nrab taw tes hauv av, thaum ib-theem grounding tshwm sim, tam sim no ntawm theem av nce siab, lub cev muaj zog vibrates thiab ua suab nrov txawv txav, thiab lub cev muaj zog heats li, uas tej zaum yuav fuse lub fuse ntawm cov theem thaum pib, los yog puas lub winding pab pawg neeg vim overheating.
9. Dab tsi yog qhov cuam tshuam ntawm kev hloov pauv ntawm kev ua haujlwm ntawm induction motor?
Teb: thaum qhov sib txawv zaus tshaj ± 1% ntawm qhov ntsuas tam sim no, kev ua haujlwm ntawm lub cev muaj zog yuav tsis zoo, cuam tshuam rau kev ua haujlwm ntawm lub cev muaj zog.
Thaum lub zog ua haujlwm ntawm lub cev muaj zog tas li, qhov sib nqus flux yog inversely proportional rau zaus, yog li qhov kev hloov ntawm zaus yuav cuam tshuam rau qhov sib nqus flux ntawm lub cev muaj zog.
Qhov pib torque ntawm lub cev muaj zog yog inversely proportional rau lub voos xwmfab ntawm zaus, lub siab tshaj plaws torque yog inversely proportional rau lub square ntawm zaus, thiab lub siab tshaj plaws torque yog inversely proportional rau lub square ntawm zaus. Yog li ntawd, qhov kev hloov ntawm zaus kuj muaj kev cuam tshuam rau lub cev muaj zog torque.
Qhov kev hloov ntawm zaus kuj yuav cuam tshuam rau qhov ceev thiab cov zis ntawm lub cev muaj zog.
Thaum cov zaus nce, cov stator tam sim no feem ntau nce. Thaum qhov hluav taws xob txo qis, qhov zaus txo qis thiab lub zog reactive absorbed los ntawm lub cev muaj zog txo.
Vim qhov kev hloov ntawm zaus, nws tseem yuav cuam tshuam rau kev ua haujlwm ntawm lub cev muaj zog thiab ua kom kub.
10. nyob rau hauv cov xwm txheej dab tsi yuav lub induction lub cev muaj zog tshaj-voltage?
Teb: qhov kev khiav hauj lwm induction lub cev muaj feem xyuam rau kev khiav hauj lwm overvoltage ntawm inductive load thaum lub sij hawm ntawm switching tawm. Qee zaum, nws tuaj yeem tsim kev khiav hauj lwm overvoltage thaum kaw. Yog hais tias lub rotor ntawm lub qhov txhab lub cev muaj zog ntawm ntau tshaj 3000 V yog qhib Circuit Court, lub magnetic flux yuav hloov tam sim ntawd thaum lub sij hawm ntawm kaw thaum pib, uas kuj yuav tsim overvoltage.
11. Dab tsi yog qhov cuam tshuam ntawm qhov sib txawv ntawm qhov kev ua haujlwm ntawm induction motor?
Teb: Cov hauv qab no piav qhia txog qhov cuam tshuam ntawm kev ua haujlwm ntawm lub cev muaj zog thaum qhov voltage deviates los ntawm tus nqi ntsuas. Rau kev yooj yim, thaum sib tham txog qhov hloov pauv voltage, nws xav tias qhov zaus ntawm cov khoom siv hluav taws xob thiab lub zog torque ntawm lub cev muaj zog tas li.
(1) Kev cuam tshuam ntawm cov hlau nplaum sib nqus
Qhov loj ntawm qhov sib nqus flux hauv lub cev muaj zog yog nyob ntawm qhov loj ntawm lub peev xwm hluav taws xob. Ntawm qhov chaw ntawm kev tsis saib xyuas lub siab poob ntawm stator winding to resistance, lub peev xwm yog sib npaug rau qhov voltage ntawm lub cev muaj zog. Raws li cov hluav taws xob muaj peev xwm hloov pauv ncaj qha mus rau qhov sib nqus flux, thaum qhov hluav taws xob nce, qhov sib nqus flux nce ncaj qha; Raws li qhov voltage txo, qhov sib nqus flux txo proportionally.
3 theem induction lub cev muaj zog daim ntawv teev cov hluav taws xob lub cev muaj zog manufacturers hauv Is Nrias teb
(2) cuam tshuam rau lub sijhawm
Txawm hais tias nws yog qhov pib torque, kev khiav hauj lwm torque los yog qhov siab tshaj plaws torque, nws yog proportional rau lub square ntawm qhov voltage. Qhov qis dua qhov voltage, qhov me me ntawm lub torque. Raws li qhov voltage txo, qhov pib torque txo, uas yuav ua rau kom lub sij hawm pib. Piv txwv li, thaum lub voltage txo los ntawm 20%, lub sij hawm pib yuav nce 3.75 zaug. Nws yuav tsum tau muab sau tseg tias thaum lub voltage poob mus rau ib tug tej yam nqi, lub siab tshaj plaws torque ntawm lub cev muaj zog yog tsawg tshaj li cov kuj torque, yog li ntawd lub cev muaj zog yuav nres. Qee zaum (xws li thaum lub load yog lub twj tso kua mis dej thiab muaj dej siab), lub cev muaj zog yuav thim rov qab.
(3) cuam tshuam rau kev ceev
Qhov kev hloov ntawm qhov hluav taws xob muaj qhov cuam tshuam me ntsis ntawm qhov ceev. Tab sis qhov kev sib piv dav dav yog tias qhov hluav taws xob txo qis thiab qhov nrawm kuj txo, vim tias qhov hluav taws xob txo qis thiab cov hluav taws xob hluav taws xob txo qis. Piv txwv li, rau lub cev muaj zog nrog cov qhab nias ntawm 2% thiab qhov siab tshaj plaws torque ntawm ob zaug ntawm qhov ntsuas torque, thaum qhov hluav taws xob raug txo los ntawm 20%, qhov ceev tsuas yog txo los ntawm 1.6%.
(4) Kev cuam tshuam ntawm cov zis
Output yog lub zog tso zis. Nws txoj kev sib raug zoo nrog voltage yog zoo ib yam li kev sib raug zoo ntawm kev ceev thiab voltage. Kev hloov hluav taws xob tsis tshua muaj txiaj ntsig ntawm cov zis, tab sis cov zis kuj txo qis nrog qhov txo qis ntawm qhov voltage.
(5) Kev cuam tshuam ntawm stator tam sim no
Stator tam sim no yog vector sum ntawm tsis muaj load tam sim no thiab load tam sim no. Lub load tam sim no sib raug rau lub rotor tam sim no. Qhov kev hloov pauv ntawm cov khoom thauj tam sim no yog qhov sib txawv ntawm qhov voltage, uas yog, thaum qhov hluav taws xob nce, qhov kev thauj khoom tam sim no txo qis, qhov hluav taws xob txo, thiab cov khoom thauj tam sim no nce. Cov kev hloov pauv ntawm tsis muaj load tam sim no (los yog excitation tam sim no) yog tib yam li qhov voltage, uas yog, thaum lub voltage nce, qhov tsis muaj-load tam sim no kuj nce, vim hais tias tsis muaj-load tam sim no nce nrog qhov nce ntawm magnetic flux. .
Thaum qhov hluav taws xob txo qis, qhov hluav taws xob hluav taws xob torque txo qis, lub plam nce, lub rotor tam sim no thiab cov khoom thauj tam sim no hauv stator nce, thiab tsis muaj kev thauj khoom tam sim no txo. Feem ntau, qhov qub yog qhov tseem ceeb, yog li thaum qhov hluav taws xob txo qis, lub stator tam sim no feem ntau nce.
Thaum qhov hluav taws xob nce, lub tshuab hluav taws xob electromagnetic torque nce, qhov poob qis, qhov load tam sim no txo, thiab qhov tsis muaj load tam sim no nce. Tab sis muaj ob qhov xwm txheej ntawm no: thaum qhov hluav taws xob sib txawv ntawm qhov ntsuas tus nqi me me thiab cov hlau nplaum sib nqus tsis nce ntau, cov tub ntxhais hlau tsis saturated, thiab qhov nce ntawm qhov tsis muaj load tam sim no yog proportional rau qhov voltage. Lub sijhawm no, qhov txo qis ntawm kev thauj khoom tam sim no tseem ceeb thiab cov stator tam sim no raug txo; Thaum qhov voltage deviates los ntawm tus nqi ntsuas tau zoo heev thiab cov hlau nplaum flux nce ntau, qhov tsis muaj kev thauj khoom tam sim no tau nce sai vim qhov saturation ntawm cov tub ntxhais hlau, yog li ntawd nws yuav siv sij hawm kom zoo dua. Lub sijhawm no, lub stator tam sim no nce. Yog li ntawd, thaum lub voltage nce, lub stator tam sim no pib txo me ntsis thiab ces nce. Nyob rau lub sijhawm no, lub zog tseem ceeb zuj zus.
3 theem induction lub cev muaj zog daim ntawv teev cov hluav taws xob lub cev muaj zog manufacturers hauv Is Nrias teb
(6) Kev cuam tshuam ntawm absorbed reactive zog
Lub zog reactive absorbed los ntawm lub cev muaj zog yog cov xau reactive zog thiab magnetization reactive zog. Cov yav tas los tsim kom muaj qhov sib nqus sib nqus, thiab tom kawg tsim lub ntsiab magnetic teb rau electromagnetic zog hloov ntawm stator thiab rotor.
Lub zog hluav taws xob hloov pauv hloov pauv mus rau qhov xwm txheej ntawm qhov hluav taws xob, thaum lub zog hluav taws xob sib nqus sib txawv nrog cov square ntawm qhov hluav taws xob. Txawm li cas los xij, vim muaj kev cuam tshuam ntawm cov tub ntxhais hlau saturation, lub zog hlau nplaum yuav tsis hloov pauv mus rau qhov square ntawm qhov voltage. Yog li ntawd, thaum lub voltage txo, tag nrho cov reactive zog absorbed los ntawm lub system tsis hloov ntau thiab tej zaum yuav txo.
(7) Kev cuam tshuam rau kev ua haujlwm
Yog tias qhov hluav taws xob raug txo qis, cov neeg kho tshuab poob zoo li tsis hloov pauv, thiab cov hlau poob yog yuav luag proportional rau lub square ntawm voltage; Kev poob ntawm lub rotor winding nce nyob rau hauv ncaj qha kev faib ua feem rau square ntawm lub rotor tam sim no; Qhov poob ntawm stator winding yog nyob ntawm qhov nce lossis txo ntawm stator tam sim no, thiab lub stator tam sim no nyob ntawm kev sib raug zoo ntawm cov khoom thauj tam sim no thiab tsis muaj kev thauj khoom tam sim no. Feem ntau, kev ua haujlwm ntawm lub cev muaj zog nce me ntsis thaum lub load me me (≤ 40%), thiab tom qab ntawd pib txo qis.
(8) Ua rau kub taub hau
Thaum qhov sib txawv ntawm qhov voltage me me, lub stator tam sim no nce vim qhov txo qis ntawm qhov voltage; Raws li qhov voltage nce, lub stator tam sim no txo. Nyob rau hauv ib qho kev sib txawv, kev poob hlau thiab tooj liab tuaj yeem them nyiaj rau ib leeg, thiab qhov kub thiab txias tau khaws cia rau hauv qhov tso cai. Yog li ntawd, thaum lub voltage hloov nyob rau hauv ± 5% ntawm tus nqi ntsuas, lub peev xwm ntawm lub cev muaj zog tseem nyob twj ywm unchanged. Txawm li cas los xij, thaum qhov hluav taws xob poob qis dua 5% ntawm tus nqi ntsuas, qhov tso zis ntawm lub cev muaj zog yuav tsum raug txwv, txwv tsis pub stator winding yuav overheat, vim hais tias cov stator tam sim no tau nce mus rau tus nqi siab dua nyob rau lub sijhawm no. Thaum qhov hluav taws xob nce los ntawm ntau tshaj 10%, lub stator winding kub yuav siab tshaj tus nqi tso cai vim qhov nce ntawm qhov sib nqus flux ceev, hlau poob thiab stator tam sim no.
