1. Yenziwa njani amandla e-electromotive angasemva?
Enyanisweni, isizukulwana samandla e-electromotive angasemva kulula ukusiqonda. Abafundi abanenkumbulo engcono kufuneka bazi ukuba baye bavezwa kuyo kwasekuqaleni kwisikolo samabanga aphakamileyo nakwisikolo esiphakamileyo. Nangona kunjalo, yayibizwa ngokuba yi-electromotive force eyenziwe ngelo xesha. Umgaqo-siseko kukuba umqhubi usika imigca yamagnetic. Logama nje kukho intshukumo ezimbini Relative ngokwaneleyo, nokuba intsimi kazibuthe ayishukumi kwaye umqhubi cut; inokuthi kwakhona i-conductor ayishukumi kwaye i-magnetic field ihamba.
Yemagnethi esisigxina synchronousimoto, iikhoyili zayo zilungiswe kwi-stator (i-conductor), kwaye iimagnethi ezisisigxina zigxininiswe kwi-rotor (intsimi yamagnetic). Xa i-rotor ijikeleza, intsimi yamagnetic eyenziwe ngamagnethi esigxina kwi-rotor iya kujikeleza kwaye itsalwe yi-stator. Ikhoyili kwikhoyili iyanqunyulwa kwayeamandla e-electromotive angasemvaiveliswa kwikhoyili. Kutheni ibizwa ngokuba yi-back electromotive force? Njengoko igama libonisa, kuba isalathiso samandla e-electromotive angasemva e-E sichasene necala le-terminal voltage U (njengoko kubonisiwe kuMfanekiso 1).
2. Luyintoni unxulumano phakathi kwamandla e-electromotive angasemva kunye ne-terminal voltage?
Inokubonwa kuMzobo woku-1 ukuba ubudlelwane phakathi kwamandla ombane angemva kunye ne-terminal voltage phantsi komthwalo yile:
Kuvavanyo lwamandla e-electromotive yangasemva, ivavanywa ngokubanzi phantsi kwemeko yokungathwali, akukho okwangoku, kwaye isantya sokujikeleza siyi-1000rpm. Ngokuqhelekileyo, ixabiso le-1000rpm lichazwe, kunye ne-back electromotive force coefficient = ixabiso eliqhelekileyo le-back electromotive force / speed. I-coefficient yamandla e-electromotive yangasemva yipharamitha ebalulekileyo yemoto. Kufuneka kuqatshelwe apha ukuba amandla e-electromotive angasemva phantsi komthwalo ahlala etshintsha ngaphambi kokuba isantya sizinzile. Ukusuka kwi-equation (1), sinokwazi ukuba amandla e-electromotive angasemva phantsi komthwalo angaphantsi kwe-terminal voltage. Ukuba i-electromotive force yangasemva inkulu kune-terminal voltage, iba yijenereyitha kwaye ikhuphe amandla ombane ngaphandle. Ekubeni ukuchasana kunye nokukhoyo kumsebenzi wangempela kuncinci, ixabiso le-electromotive force yangasemva liphantse lilingane ne-terminal voltage kwaye lilinganiselwe ngexabiso elilinganisiweyo le-terminal voltage.
3. Intsingiselo yomzimba yamandla e-electromotive angasemva
Khawucinge ukuba kuya kwenzeka ntoni ukuba amandla e-electromotive angasemva abekho? Inokubonwa kwi-equation (1) ukuba ngaphandle kwamandla e-electromotive angasemva, i-motor iyonke ilingana nesixhasi esisulungekileyo kwaye iba sisixhobo esenza ubushushu obukhulu ngakumbi. Okuichasene nento yokuba i-motor iguqula amandla ombane abeamandla oomatshini.
Kubudlelwane bokuguqulwa kwamandla ombane
, I-UIt yigalelo lamandla ombane, njengegalelo lamandla ombane kwibhetri, i-motor okanye i-transformer; I-I2Rt amandla okulahleka kobushushu kwisekethe nganye, le nxalenye yamandla luhlobo lwamandla okulahleka kobushushu, encinci ngcono; igalelo amandla ombane kunye nelahleko yobushushu Umahluko kumandla ombane yinxalenye yamandla aluncedo ahambelana ne-electromotive force yangasemva.
, ngamanye amazwi, amandla e-electromotive angasemva asetyenziselwa ukuvelisa amandla aluncedo, ahambelana ngokuphambene nokulahleka kobushushu. Okukhona amandla okulahleka kobushushu, amancinci amandla aluncedo anokufumaneka.
Ukuthetha ngenjongo, i-electromotive force yangasemva idla amandla ombane kwisekethe, kodwa ayikho "ilahleko". Inxalenye yamandla ombane ehambelana namandla ombane ombane angasemva iya kuguqulwa ibe ngamandla aluncedo kwisixhobo sombane, njengamandla omatshini enjini kunye namandla ebhetri. Amandla ekhemikhali njl.
Kunokubonwa ukuba ubungakanani bamandla ombane angemva buthetha ukukwazi kwesixhobo sombane ukuguqula amandla engeniso ewonke abe ngamandla aluncedo, kwaye abonakalisa inqanaba lokukwazi ukuguqula isixhobo sombane.
4. Ubungakanani bamandla e-electromotive yangasemva buxhomekeke kwintoni?
Okokuqala nika ifomyula yokubala yamandla e-electromotive angasemva:
U-E ngamandla e-electromotive wekhoyili, ψ lunxibelelwano lwemagnethi, f luphindaphindo, N linani lokujika, kunye no-Φ ngumbane wemagnethi.
Ngokusekelwe kwifomula engentla, ndiyakholelwa ukuba wonke umntu unokuxelela izinto ezimbalwa ezichaphazela ubungakanani be-electromotive force yangasemva. Nasi isishwankathelo senqaku:
(1) Amandla e-electromotive angasemva alingana nesantya sokutshintsha konxibelelwano lwemagnethi. Okukhona siphezulu isantya sokujikeleza, kokukhona isantya sotshintsho sikhulu kunye namandla omva we-electromotive;
(2) Ikhonkco lemagnethi ngokwalo lilingana nenani lokujika eliphindaphindwe likhonkco lemagnethi elijiko elinye. Ke ngoko, okukhona liphezulu inani lokujika, kokukhona likhulu ikhonkco lemagnethi kwaye kokukhona amandla ombane angemva;
(3) Inani lokujika linxulumene neskimu sokujija, uqhagamshelo lwenkwenkwezi-delta, inani lokujika kwindawo nganye, inani lezigaba, inani lamazinyo, inani lamasebe ahambelanayo, i-whole-pitch okanye i-short-pitch scheme;
4 Ke ngoko, amandla amakhulu e-magnetomotive, kokukhona kuncinci ukuxhathisa kwemagnethi kwicala lonxibelelwano lwemagnethi, kwaye kokukhona umva wamandla e-electromotive;
(5) Ukumelana nemagnethiinxulumene nentsebenziswano ye-gap yomoya kunye ne-pole slot. Okukhona umkhulu umsantsa womoya, kokukhona uxhathiso lwemagnethi kwaye umncinci umva wamandla e-electromotive. Ulungelelwaniso lwe-pole-groove lunzima kwaye lufuna uhlalutyo olucacileyo;
(6) Amandla emagnetomotive anxulumene nokuhlala kwemagnethi kunye nendawo esebenzayo yemagnethi. Okukhona iremanence inkulu, kokukhona iphezulu amandla e-electromotive angasemva. Indawo esebenzayo inxulumene nolwalathiso lwemagnethi, ubungakanani kunye nokubekwa kwemagnethi, kwaye ifuna uhlalutyo oluthile;
(7) Imagnethi eshiyekileyo inxulumene nobushushu. Okukhona iqondo lobushushu liphezulu, kokukhona umva amandla e-electromotive amancinci.
Isishwankathelo, izinto eziphembelela amandla ombane we-electromotive umva zibandakanya isantya sokujikeleza, inani lokujika kwi-slot nganye, inani lezigaba, inani lamasebe ahambelanayo, i-pitch emfutshane, i-motor magnetic circuit, ubude be-gap yomoya, ulungelelwaniso lwe-pole-slot, i-magnetism residual magnetism, kunye nendawo yokubeka imagnethi. Kunye nobungakanani bemagnethi, isalathisi semagneti, ubushushu.
5. Ungakhetha njani ubungakanani bamandla e-electromotive yangasemva kuyilo lweemoto?
Kuyilo lweemoto, amandla angasemva e-electromotive E abaluleke kakhulu. Ndicinga ukuba i-electromotive force yangasemva iyilwe kakuhle (ukhetho olufanelekileyo lobungakanani kunye nesantya esisezantsi sokugqwethwa kwamaza), imoto iya kuba ilungile. Iziphumo eziphambili zamandla e-electromotive angasemva kwiimotor zezi zilandelayo:
1. Ubungakanani bamandla ombane we-electromotive ngasemva bumisela indawo ebuthathaka yemoto, kwaye indawo ebuthathaka yentsimi imisela ukuhanjiswa kwemephu yobuchule beemoto.
2. Isantya sokuphazamiseka kwe-electromotive force waveform yangasemva ichaphazela i-ripple torque ye-motor kunye nokuzinza kwe-torque output xa i-motor isebenza.
3. Ubungakanani be-electromotive force yangasemva bumisela ngokuthe ngqo i-coefficient torque ye-motor, kwaye i-coefficient yamandla e-electromotive yangasemva ihambelana ngokuthe ngqo kwi-torque coefficient. Kule nto sinokuzoba oku kuphikisana kulandelayo okujongene noyilo lweemoto:
a. Njengoko amandla e-electromotive angasemva enyuka, i-motor inokugcina i-torque ephezulu phantsiyomlawuliumda wangoku kwindawo yokusebenza enesantya esisezantsi, kodwa awukwazi ukukhupha itorque ngesantya esiphezulu, okanye ufikelele kwisantya esilindelekileyo;
b. Xa i-electromotive force yangasemva incinci, i-motor isenamandla okuphuma kwindawo enesantya esiphezulu, kodwa i-torque ayinakufikelelwa phantsi komlawuli ofanayo ngoku ngesantya esiphantsi.
Ke ngoko, uyilo lwamandla e-electromotive angasemva kuxhomekeke kwiimfuno zokwenyani zemoto. Umzekelo, kuyilo lwenjini encinci, ukuba kufuneka ikhuphe itorque eyaneleyo ngesantya esiphantsi, ke amandla ombane ongemva kufuneka ayilwe ukuba abe mkhulu.
Ixesha lokuposa: Feb-04-2024