Emuva i-EMF ye-Permanent Magnet Synchronous Motor

Emuva i-EMF ye-Permanent Magnet Synchronous Motor

1. Yenziwa kanjani emuva i-EMF?

Isizukulwane samandla e-electromotive angemuva kulula ukusiqonda. Isimiso siwukuthi umqhubi usika imigqa yamagnetic yamandla. Inqobo nje uma kukhona ukunyakaza okuhlobene phakathi kwakho kokubili, inkambu kazibuthe ingase ime futhi umqhubi ayinqamule, noma i-conductor ingase imile futhi inkambu kazibuthe inyakaze.

Ukuze uthole ama-motor synchronous kazibuthe unomphela, amakhoyili awo agxilwe ku-stator (i-conductor) futhi odonsa unomphela babekwe ku-rotor (insimu kazibuthe). Lapho i-rotor izungeza, insimu kazibuthe ekhiqizwa omazibuthe baphakade ku-rotor izojikeleza, futhi izosikwa ngamakhoyili ku-stator, ikhiqize amandla angemuva e-electromotive kumakhoyili.Kungani ibizwa ngokuthi i-back electromotive force? Njengoba igama liphakamisa, isiqondiso samandla e-electromotive angemuva Esiphambano nesiqondiso se-terminal voltage U (njengoba kubonisiwe kuMfanekiso 1).

Umfanekiso 1

2.Yini ubudlelwano phakathi kwe-EMF yangemuva kanye ne-terminal voltage?

Kungabonakala kuMfanekiso 1 ukuthi ubudlelwano phakathi kwamandla kagesi angemuva kanye ne-voltage yetheminali ngaphansi komthwalo yilokhu:

Ukuhlolwa kwe-electromotive force yangemuva ngokuvamile kwenziwa ngaphansi kwesimo sokungabikho komthwalo, ngaphandle kwamanje futhi ngesivinini se-1000 rpm. Ngokuvamile, inani le-1000rpm lichazwa njenge-back-EMF coefficient = isilinganiso se-back-EMF value/speed. I-Back-EMF coefficient iyipharamitha ebalulekile yemoto. Kumele kuqashelwe lapha ukuthi i-back-EMF ngaphansi komthwalo ishintsha njalo ngaphambi kokuba isivinini sizinzile.Kusuka kufomula (1), singakwazi ukwazi ukuthi amandla angemuva e-electromotive ngaphansi komthwalo mancane kune-voltage terminal. Uma amandla e-electromotive angemuva emakhulu kune-voltage yetheminali, iba ijeneretha bese ikhipha i-voltage ngaphandle. Njengoba ukumelana nokusebenza kwamanje emsebenzini wangempela kukuncane, inani lamandla e-electromotive angemuva licishe lilingane ne-terminal voltage futhi lilinganiselwe inani elilinganiselwe le-voltage yetheminali.

3. Incazelo ebonakalayo yamandla e-electromotive angemuva

Cabanga ukuthi bekuzokwenzekani uma i-EMF engemuva ibingekho? Kusukela ku-equation (1), singabona ukuthi ngaphandle kwe-EMF yangemuva, yonke injini ilingana ne-resistor ehlanzekile, iba idivayisi eyenza ukushisa okukhulu, okuphambene nokuguqulwa kwemoto amandla kagesi abe amandla omshini.Ku-equation yokuguqulwa kwamandla kagesi,I-UIngamandla kagesi okufakwayo, njengamandla kagesi okufakwayo ebhethrini, injini noma i-transformer; I-I2Rt amandla okulahlekelwa ukushisa kumjikelezo ngamunye, okuwuhlobo lwamandla okulahlekelwa ukushisa, okuncane kuba ngcono; umehluko phakathi kwamandla kagesi okokufaka kanye namandla kagesi okulahlekelwa ukushisa, kungamandla awusizo ahambisana namandla angemuva e-electromotive.Ngamanye amazwi, i-EMF yangemuva isetshenziselwa ukukhiqiza amandla awusizo futhi ihlobene ngokuphambene nokulahlekelwa ukushisa. Amandla amakhulu okulahlekelwa ukushisa, amancane amandla awusizo afinyelelekayo.Ngokukhuluma ngezinhloso, amandla e-electromotive angemuva adla amandla kagesi kumjikelezo, kodwa akuyona "ukulahlekelwa". Ingxenye yamandla kagesi ehambisana namandla e-electromotive angemuva izoguqulwa ibe amandla awusizo ezisetshenziswa zikagesi, njengamandla emishini yamamotho, amandla amakhemikhali amabhethri, njll.

Kungabonakala kulokhu ukuthi usayizi wamandla e-electromotive angemuva asho ikhono lezinto zikagesi zokuguqula ingqikithi yamandla okufakwayo abe amandla awusizo, abonisa izinga lekhono lokuguqula impahla kagesi.

4. Ubukhulu bamandla e-electromotive emuva buncike kuphi?

Ifomula yokubala ye-back electromotive force ithi:

U-E ungamandla ekhoyili e-electromotive, u-ψ yi-flux kazibuthe, f imvamisa, N inani lokujika, futhi Φ ukugeleza kazibuthe.
Ngokusekelwe kufomula engenhla, ngikholelwa ukuthi wonke umuntu cishe angasho izici ezimbalwa ezithinta ubukhulu bamandla e-electromotive angemuva. Nansi indatshana ongafingqa:

(1) I-EMF Emuva ilingana nezinga lokushintsha kwe-flux magnetic. Lapho ijubane liphakeme, izinga loshintsho likhulu futhi i-EMF yangemuva inkulu.

(2) I-flux kazibuthe ngokwayo ilingana nenani lokujika eliphindwe ukuguquguquka kazibuthe okuphenduka okukodwa. Ngakho-ke, inani eliphakeme lokujika, i-flux kazibuthe inkulu futhi i-EMF yangemuva inkulu.

(3) Inani lokujika lihlobene nohlelo lokujikajika, njengoxhumano lwenkanyezi-delta, inani lokujika endaweni ngayinye, inani lezigaba, inani lamazinyo, inani lamagatsha ahambisanayo, nohlelo lwephimbo eligcwele noma le-short-pitch.

(4) I-Single-turn magnetic flux ilingana namandla e-magnetomotive ahlukaniswe ukumelana kazibuthe. Ngakho-ke, amandla amakhulu e-magnetomotive, amancane amandla kazibuthe ekuqondeni kwe-flux magnetic kanye ne-EMF enkulu yangemuva.

(5) Ukumelana nozibuthe kuhlobene negebe lomoya kanye nokuxhumana kwe-pole-slot. Igebe lomoya likhulu, liba likhulu ukumelana namagnetic kanye ne-EMF yangemuva encane. Ukuxhumanisa i-Pole-slot kuyinkimbinkimbi futhi kudinga ukuhlaziywa okuqondile.

(6) Amandla kazibuthe ahlobene nensalela kazibuthe kanye nendawo esebenzayo kazibuthe. I-magnetism enkulu esele, iphakamisa i-EMF yangemuva. Indawo ephumelelayo ihlobene nesiqondiso samagnetization, ubukhulu kanye nokubekwa kukazibuthe futhi kudinga ukuhlaziywa okuqondile.

(7) Uzibuthe osalayo uhlobene nezinga lokushisa. Uma izinga lokushisa liphakeme, i-EMF yangemuva incane.

Kafushane, izici ezithinta i-EMF engemuva zihlanganisa isivinini sokuphenduka, inani lokujika kwendawo ngayinye, inani lezigaba, inombolo yamagatsha ahambisanayo, iphimbo eligcwele kanye nephimbo elifushane, isifunda sozibuthe, ubude begebe lomoya, ukufanisa i-pole-slot, i-magnetic steel residual magnetic, ukubekwa kwensimbi kazibuthe nosayizi, isiqondiso sikazibuthe wensimbi, kanye nezinga lokushisa.

5. Ungakhetha kanjani usayizi wamandla e-electromotive angemuva ekwakhiweni kwemoto?

Ekwakhiweni kwezimoto, i-EMF E emuva ibaluleke kakhulu. Uma i-EMF yangemuva iklanywe kahle (usayizi ofanelekile, ukuhlanekezela kwe-waveform ephansi), injini yinhle. I-EMF yangemuva inemiphumela eminingana emikhulu kumotho:

1. Ubukhulu be-EMF yangemuva bunquma indawo enozibuthe ebuthakathaka yenjini, futhi indawo kazibuthe ebuthakathaka inquma ukusatshalaliswa kwemephu yokusebenza kahle kwezimoto.
2. Izinga lokuhlanekezela le-EMF waveform yangemuva lithinta itorque ye-motor ripple kanye nokushelela kokuphuma kwetorque lapho injini isebenza.
3. Ubukhulu be-EMF yangemuva bunquma ngokuqondile i-coefficient ye-torque ye-motor, futhi i-coefficient ye-EMF yangemuva ilingana ne-torque coefficient.
Kulokhu, ukuphikisana okulandelayo ekwakhiweni kwezimoto kungatholakala:
a. Lapho i-EMF yangemuva inkulu, i-motor ingakwazi ukugcina i-torque ephezulu kumkhawulo wamanje wesilawuli endaweni yokusebenza yesivinini esiphansi, kodwa ayikwazi ukukhipha i-torque ngesivinini esikhulu, futhi ayikwazi ngisho nokufinyelela isivinini esilindelekile;
b. Lapho i-EMF yangemuva incane, i-motor isenamandla okukhipha endaweni yesivinini esikhulu, kodwa i-torque ayikwazi ukuzuzwa ngesilawuli esifanayo samanje ngesivinini esiphansi.

6. Umthelela omuhle we-EMF emuva kumamotho kazibuthe unomphela.

Ukuba khona kwe-EMF yangemuva kubaluleke kakhulu ekusebenzeni kwamamotho kazibuthe unomphela. Ingaletha izinzuzo ezithile nemisebenzi ekhethekile kumamotho:
a. Ukonga amandla
I-EMF yangemuva ekhiqizwe amamotho kazibuthe unomphela inganciphisa ukusebenza kwemoto, ngaleyo ndlela yehlise ukulahleka kwamandla, inciphise ukulahleka kwamandla, futhi ifeze inhloso yokonga amandla.
b. Khulisa i-torque
I-EMF yangemuva iphambene ne-voltage yokunikezwa kwamandla. Lapho ijubane lemoto likhuphuka, i-EMF yangemuva nayo iyanda. I-voltage ehlehlayo izonciphisa i-inductance ye-motor winding, okuholela ekwenyukeni kwamandla. Lokhu kuvumela injini ukuthi ikhiqize i-torque eyengeziwe futhi ithuthukise ukusebenza kwamandla enjini.
c. Hlehlisa ukwehla kwejubane
Ngemva unomphela uzibuthe motor uphelelwa amandla, ngenxa yokuba khona EMF emuva, ingaqhubeka ukukhiqiza flux kazibuthe futhi wenze rotor ukuqhubeka ukuzungeza, okuyinto eyakha umphumela emuva EMF isivinini reverse, okuyinto ewusizo kakhulu kwezinye izinhlelo zokusebenza, ezifana amathuluzi umshini kanye nezinye izinto zokusebenza.

Ngamafuphi, i-EMF yangemuva iyisici esibalulekile samamotho kazibuthe unomphela. Iletha izinzuzo eziningi kumamotho kazibuthe unomphela futhi idlala indima ebaluleke kakhulu ekwakhiweni nasekukhiqizeni amamotho. Usayizi kanye ne-waveform ye-EMF engemuva incike ezintweni ezinjengokwakheka, inqubo yokukhiqiza kanye nezimo zokusebenzisa imotho kazibuthe ehlala njalo. Usayizi ne-waveform ye-EMF yangemuva inethonya elibalulekile ekusebenzeni nasekuzinzeni kwemoto.

I-Anhui Mingteng Permanent Magnet Electromechanical Equipment Co., Ltd. (https://www.mingtengmotor.com/)ingumkhiqizi ochwepheshe wezinjini ezihambisanayo ozibuthe unomphela. Isikhungo sethu sobuchwepheshe sinabasebenzi abangaphezu kuka-40 be-R&D, abahlukaniswe yaba iminyango emithathu: ukuklama, inqubo, nokuhlola, okukhethekile ocwaningweni nasekuthuthukisweni, ukuklama, kanye nenqubo emisha yamamothoni ozibuthe ahambisanayo. Kusetshenziswa isoftware yokuklama yobungcweti kanye nezinhlelo zokuklama ezikhethekile ezizithuthukisa unomphela uzibuthe, ngesikhathi sokuklanywa kwezimoto kanye nenqubo yokukhiqiza, usayizi ne-waveform yamandla e-electromotive angemuva azocatshangelwa ngokucophelela ngokuya ngezidingo zangempela nezimo ezithile zokusebenza zomsebenzisi ukuze kuqinisekiswe ukusebenza nokuzinza kwemoto futhi kuthuthukiswe ukusebenza kahle kwamandla enjini.

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