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 ekhiqiza ukushisa okukhulu, okuphambene nokuguqulwa kwemoto amandla kagesi abe amandla omshini. i-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, inani lamagatsha ahambisanayo, iphimbo eligcwele kanye nephimbo elifushane, isifunda kazibuthe semotor, ubude begebe lomoya, ukufaniswa kwe-pole-slot, magnetic steel residual magnetism. , ukubekwa kwensimbi kazibuthe nosayizi, isiqondiso sikazibuthe sensimbi kazibuthe, 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
Ngemuva kokuthi injini yamagnetic unomphela ilahlekelwa amandla, ngenxa yokuba khona kwe-EMF yangemuva, ingaqhubeka nokukhiqiza i-flux kazibuthe futhi yenze i-rotor iqhubeke nokujikeleza, okwenza umphumela we-back EMF reverse speed, owusizo kakhulu kwezinye izinhlelo zokusebenza, ezifana njengamathuluzi omshini 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 ezizithuthukisile ezihlala unomphela, ngesikhathi sokuklanywa kwezimoto kanye nenqubo yokukhiqiza, usayizi kanye ne-waveform yamandla e-electromotive angemuva azocatshangelwa ngokucophelela ngokuya ngezidingo zangempela kanye nezimo ezithile zokusebenza zomsebenzisi ukuze kuqinisekiswe. ukusebenza kanye nokuzinza kwemoto kanye nokwenza ngcono ukusebenza kahle kwamandla enjini.

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