I-EMF engasemva ye-Permanent Magnet Synchronous Motor

I-EMF engasemva ye-Permanent Magnet Synchronous Motor

1. Yenziwa njani emva kwe-EMF?

Isizukulwana samandla e-electromotive angasemva kulula ukusiqonda. Umgaqo-siseko kukuba umqhubi usika imigca yamagnetic yamandla. Logama nje kukho intshukumo ezalanayo phakathi kwezi zimbini, umhlaba wemagnethi unokuthi ngxi kwaye umqhubi uyawusika, okanye umqhubi unokuma kwaye umhlaba wemagnethi uyashukuma.

Kwiimotor ze-synchronous zamagnetic ezisisigxina, iikhoyili zazo zigxininiswe kwi-stator (i-conductor) kwaye imagnethi esisigxina igxininiswe kwi-rotor (intsimi yamagnetic). Xa i-rotor ijikeleza, intsimi yamagnetic eveliswa yimagnethi esisigxina kwi-rotor iya kujikeleza, kwaye iya kunqunyulwa ngeekhoyili kwi-stator, ivelise umva amandla e-electromotive kwi-coils.Kutheni ibizwa ngokuba yi-back electromotive force? Njengoko igama libonisa, isalathiso samandla e-electromotive angasemva e-E sichasene necala le-terminal voltage U (njengoko kubonisiwe kuMfanekiso 1).

Umfanekiso woku-1

2.Yintoni ubudlelwane phakathi kwe-EMF yangasemva kunye ne-terminal voltage?

Inokubonwa kuMzobo woku-1 ukuba unxulumano phakathi kwamandla ombane ombane angasemva kunye ne-terminal voltage phantsi komthwalo:

Uvavanyo lwamandla e-electromotive lwangemva luqhutyelwa ngokubanzi phantsi kwemeko yokungabikho komthwalo, ngaphandle kwangoku kunye nesantya se-1000 rpm. Ngokuqhelekileyo, ixabiso le-1000rpm lichazwa njenge-back-EMF coefficient = i-avareji ye-back-EMF value / speed. I-Back-EMF coefficient yiparameter ebalulekileyo yemoto. Kufuneka kuqatshelwe apha ukuba i-back-EMF phantsi komthwalo ihlala iguquka ngaphambi kokuba isantya sizinzile.Ukusuka kwifomula (1), sinokwazi ukuba amandla angemva kwe-electromotive phantsi komthwalo omncinci kune-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 i-EMF yangasemva yayingekho? Ukusuka kwi-equation (1), sinokubona ukuba ngaphandle kwe-EMF yangasemva, yonke i-motor ilingana ne-resistor ecocekileyo, ibe sisixhobo esenza ubushushu obuninzi, nto leyo echasene nokuguqulwa kwemoto yamandla ombane kumandla ombane. i-equation yokuguqulwa kwamandla ombane,I-UIligalelo lamandla ombane, anje ngegalelo lamandla ombane kwibhetri, kwimoto okanye kwisiguquli; I-I2Rt amandla okulahlekelwa bubushushu kwisekethe nganye, luhlobo lwamandla okulahleka kobushushu, encinci ngcono; Umahluko phakathi kwegalelo lamandla ombane kunye nelahleko yobushushu yamandla ombane, Ngamandla aluncedo ahambelana ne-electromotive force yangasemva..Ngamanye amazwi, i-EMF yangasemva isetyenziselwa ukuvelisa amandla aluncedo kwaye ihambelana ngokuphambene nokulahleka kobushushu. I-eneji enkulu yokulahleka kobushushu, incinci amandla asebenzisekayo anokufezekiswa.Ukuthetha ngokufanelekileyo, amandla e-electromotive angasemva adla amandla ombane kwisekethe, kodwa "ayiyolahleko". Inxalenye yamandla ombane ehambelana ne-electromotive force yangasemva iya kuguqulwa ibe ngamandla aluncedo kwizixhobo zombane, njengamandla omatshini weemotor, amandla ekhemikhali eebhetri, njl.

Kunokubonwa koku ukuba ubukhulu bamandla e-electromotive angasemva buthetha ukukwazi kwesixhobo sombane ukuguqula amandla egalelo lilonke abe ngamandla aluncedo, abonakalisa inqanaba lokukwazi ukuguqula isixhobo sombane.

4. Ubungakanani bamandla e-electromotive yangasemva buxhomekeke kuyo?

Ifomyula yokubala yamandla e-electromotive yangasemva yile:

U-E ngamandla e-coil electromotive, ψ yimagnetic flux, f yi-frequency, N linani lokujika, kwaye Φ yi-flux magnetic.
Ngokusekelwe kwifomula engentla, ndiyakholelwa ukuba wonke umntu unokuthi athethe izinto ezimbalwa ezichaphazela ubukhulu be-electromotive force yangasemva. Nali inqaku oza kulishwankathela:

(1) I-EMF yangasemva ilingana nezinga lokutshintsha kwe-magnetic flux. Isantya esiphezulu, isantya esikhulu sokutshintsha kunye ne-EMF enkulu ngasemva.

(2) Imagnethi eguquguqukayo ngokwayo ilingana nenani leenguqu eziphindaphindwe yimagnethi enye. Ke ngoko, inani eliphezulu lokujika, kokukhona i-magnetic flux kunye ne-EMF enkulu yangasemva.

(3) Inani lokujika linxulumene neskimu sokujija, esifana noqhagamshelo lwenkanyezi-delta, inani lokujika kwindawo nganye, inani lezigaba, inani lamazinyo, inani lamasebe ahambelanayo, kunye neskimu esipheleleyo okanye esifutshane.

4 Ke ngoko, amandla amakhulu e-magnetomotive, incinci ukuxhathisa kwamagnetic kwicala le-magnetic flux kunye ne-EMF enkulu yangasemva.

(5) Ukumelana nemagnethi kunxulumene nesithuba somoya kunye nolungelelwaniso lwe-pole-slot. Inkulu i-gap yomoya, inkulu ukuchasana kwamagnetic kunye ne-EMF encinci yangasemva. Ulungelelwaniso lwe-Pole-slot lunzima kwaye lufuna uhlalutyo oluthile.

(6) Amandla emagnethi anxulumene nentsalela umazibuthe kunye nendawo esebenzayo umazibuthe. Inkulu imagnethi eyintsalela, iphezulu i-EMF yangasemva. Indawo esebenzayo inxulumene nolwalathiso lwemagneti, ubungakanani kunye nokubekwa kwemagnethi kwaye ifuna uhlalutyo oluthile.

(7) Imagnethi eshiyekileyo inxulumene nobushushu. Ukuphakama kweqondo lokushisa, i-EMF encinci yangasemva.

Isishwankathelo, izinto ezichaphazela i-EMF ngasemva ziquka isantya sokujikeleza, inani lokujika kwi-slot nganye, inani lezigaba, inani lamasebe ahambelanayo, i-pitch epheleleyo kunye ne-pitch emfutshane, i-motor magnetic circuit, ubude be-gap yomoya, ukuhambelana kwe-pole-slot, i-magnetism eseleyo yentsimbi. , ukubekwa kwentsimbi yamagnetic kunye nobukhulu, isalathisi semagneti yentsimbi, kunye nobushushu.

5. Ungakhetha njani ubungakanani bamandla e-electromotive yangasemva kuyilo lweemoto?

Kuyilo lweemoto, umva i-EMF E ibaluleke kakhulu. Ukuba i-EMF yangasemva iyilwe kakuhle (ubungakanani obufanelekileyo, ukuphambuka kwe-waveform ephantsi), i-motor ilungile. I-EMF yangasemva ineempembelelo ezininzi ezinkulu kwimoto:

1. Ubukhulu be-EMF yangasemva bumisela indawo ebuthathaka yamagnetic yemoto, kwaye indawo ebuthathaka yamagnetic imisela ukuhanjiswa kwemephu esebenzayo yemoto.
2. Isantya sokuphazamiseka kwe-EMF waveform yangasemva ichaphazela i-motor ripple torque kunye nokugudiswa kwemveliso ye-torque xa i-motor isebenza.
3. Ubungakanani be-EMF yangasemva bunquma ngokuthe ngqo i-torque coefficient ye-motor, kwaye i-coefficient ye-EMF yangasemva ihambelana ne-torque coefficient.
Ukusuka koku, oku kuphikisana kulandelayo kuyilo lweemoto kunokufumaneka:
a. Xa i-EMF yangasemva inkulu, i-motor inokugcina i-torque ephezulu kumda wokulawula okwangoku kwindawo yokusebenza ephantsi, kodwa ayikwazi ukuvelisa i-torque ngesantya esiphezulu, kwaye ayikwazi ukufikelela kwisantya esilindelekileyo;
b. Xa i-EMF yangasemva incinci, i-motor isenawo amandla okuphuma kwindawo enesantya esiphezulu, kodwa i-torque ayinakufezekiswa kumlawuli ofanayo ngoku ngesantya esiphantsi.

6. Impembelelo entle ye-EMF yangasemva kwiinjini zemagnethi ezisisigxina.

Ubukho be-EMF yangasemva bubaluleke kakhulu ekusebenzeni kweenjini zemagnethi ezisisigxina. Inokuzisa izibonelelo ezithile kunye nemisebenzi ekhethekileyo kwiinjini:
a. Ukonga amandla
I-EMF engasemva eveliswa ziimotor zemagnethi esisigxina inokunciphisa umsinga wemoto, ngaloo ndlela inciphisa ukulahleka kwamandla, inciphisa ukulahleka kwamandla, kunye nokufezekisa injongo yokonga amandla.
b. Yandisa itorque
I-EMF yangasemva ichasene nombane wombane. Xa isantya semoto sinyuka, i-EMF yangasemva iyanda. I-voltage ebuyela umva iya kunciphisa i-inductance ye-motor winding, okukhokelela ekunyuseni kwangoku. Oku kuvumela injini ukuba ivelise itorque eyongezelelweyo kunye nokuphucula ukusebenza kwamandla emoto.
c. Reverse deceleration
Emva kokuba injini yemagnethi esisigxina ilahlekelwe ngamandla, ngenxa yobukho be-EMF yangasemva, inokuqhubeka nokuvelisa i-magnetic flux kwaye yenza i-rotor iqhubeke ijikeleza, eyenza umphumo we-EMF umva isantya esibuyisela umva, esiluncedo kakhulu kwezinye izicelo. njengezixhobo zoomatshini kunye nezinye izixhobo.

Ngamafutshane, umva we-EMF yinto eyimfuneko yeenjini zemagnethi ezisisigxina. Izisa izibonelelo ezininzi kwiimotor zemagnethi ezisisigxina kwaye idlala indima ebaluleke kakhulu kuyilo kunye nokwenziwa kweemoto. Ubungakanani kunye ne-waveform ye-EMF yangasemva ixhomekeke kwizinto ezinje ngoyilo, inkqubo yokuvelisa kunye neemeko zokusebenzisa imotor yemagnethi esisigxina. Ubungakanani kunye ne-waveform ye-EMF yangasemva inefuthe elibalulekileyo ekusebenzeni kunye nokuzinza kwemoto.

I-Anhui Mingteng yesiGxina seMagnet Electromechanical Equipment Co., Ltd. (https://www.mingtengmotor.com/)ngumvelisi oqeqeshiweyo weenjini zemagnethi ezisisigxina. Iziko lethu lobuchwephesha linabasebenzi abangaphezu kwama-40 be-R&D, elahlulwe yangamasebe amathathu: uyilo, inkqubo, kunye novavanyo, ngokukodwa kuphando kunye nophuhliso, uyilo, kunye nenkqubo yokuveliswa kweemotor ezisisigxina zemagnethi. Usebenzisa isoftware yoyilo lobuchwephesha kunye neenkqubo zoyilo ezikhethekileyo zoyilo lwemagnethi, ngexesha loyilo lweemoto kunye nenkqubo yokuvelisa, ubungakanani kunye ne-waveform yamandla e-electromotive yangasemva iya kuqwalaselwa ngononophelo ngokweemfuno zokwenyani kunye neemeko ezithile zokusebenza zomsebenzisi ukuze kuqinisekiswe. ukusebenza kunye nokuzinza kwemoto kunye nokuphucula ukusebenza kakuhle kwamandla emoto.

Ilungelo lokushicilela: Eli nqaku lishicilelwe kwakhona inombolo kawonke-wonke ye-WeChat “电机技术及应用”, ikhonkco lokuqala https://mp.weixin.qq.com/s/e-NaJAcS1rZGhSGNPv2ifw

Eli nqaku alibonisi iimbono zenkampani yethu. Ukuba unezimvo ezahlukeneyo okanye iimbono, nceda usilungise!