Li-motor, tseo ka kakaretso li bitsoang li-motor tsa motlakase, tse tsejoang hape e le li-motor, li atile haholo indastering le bophelong ba sejoale-joale, hape ke lisebelisoa tsa bohlokoahali tsa ho fetolela matla a motlakase ho ba matla a mochini.Li-motor li kentsoe likoloing, litereneng tsa lebelo le holimo, lifofaneng, lifensetereng tsa moea, liroboto, mamati a othomathiki, lipompo tsa metsi, li-hard drive esita le mehala ea rona ea selefounu e tloaelehileng.

Batho ba bangata ba bacha ho li-motor kapa ba sa tsoa ithuta tsebo ea ho khanna ba ka 'na ba ikutloa hore ho thata ho utloisisa tsebo ea likoloi, esita le ho bona lithuto tse amehang,' me li bitsoa "credit killers".Ho arolelana ho latelang ho ka lumella li-novices ho utloisisa ka potlako molao-motheo oa AC asynchronous motor.

Molao-motheo oa motlakase: Molao-motheo oa motlakase o bonolo haholo. Ka mantsoe a bonolo feela, ke sesebelisoa se sebelisang matla a motlakase ho hlahisa matla a khoheli a potolohang holim'a coil le ho sutumetsa rotor ho potoloha.Mang kapa mang ea ithutileng molao oa ho kenngoa ha motlakase oa motlakase oa tseba hore coil e matlafalitsoeng e tla qobelloa ho potoloha sebakeng sa khoheli. Ena ke molao-motheo oa motheo oa motlakase. Ena ke tsebo ea fisiks ea sekolo se phahameng sa junior.

Sebopeho sa makoloi: Mang kapa mang ea qhaqhollang enjene oa tseba hore enjene e entsoe haholo ka likarolo tse peli, karolo e tsitsitseng ea stator le karolo e potolohang ea rotor, ka tsela e latelang:

1. Stator (karolo e tsitsitseng)

Stator core: karolo ea bohlokoa ea potoloho ea motlakase ea motlakase, eo ho behoang li-winding tsa stator;

Stator winding: Ke coil, karolo ea potoloho ea enjene, e hokahaneng le phepelo ea motlakase mme e sebelisetsoa ho hlahisa matla a khoheli a potolohang;

Motlakase oa mochini: lokisa sekoaelo sa stator le sekoahelo sa motlakase, 'me u bapale karolo ea tšireletso le ho senya mocheso;

2. Rotor (karolo e potolohang)

Rotor core: karolo ea bohlokoa ea potoloho ea makenete ea enjene, moea oa rotor o behiloe mokokotlong oa mantlha;

Rotor winding: seha matla a khoheli a potolohang a stator ho hlahisa matla a motlakase le a hona joale, le ho theha torque ea motlakase ho potoloha enjene;

Mefuta e mengata ea lipalo ea enjene:

1. E amanang le motlakase

1) Foromo ea matla a motlakase e kentsoeng ea enjene: E = 4.44 * f * N * Φ, E ke matla a coil electromotive, f ke frequency, S ke sebaka sa karolo e fapaneng ea conductor e potolohileng (joalo ka tšepe. core), N ke palo ea ho chenchana, 'me Φ ke magnetic Pass.

Mokhoa ona o entsoe joang, ha re na ho kenella ka har'a lintho tsena, haholo-holo re tla bona mokhoa oa ho e sebelisa.Matla a electromotive a susumetsoang ke mohloli oa matla a motlakase. Ka mor'a hore mokhanni ea nang le matla a electromotive a koetsoe, ho tla hlahisoa motlakase o kentsoeng.Motlakase o susumetsoang ke matla a ampere a matla a khoheli, 'me o etsa nako ea makenete e sutumelletsang khoele hore e retelehe.

Hoa tsebahala ho tsoa ho foromo e ka holimo hore boholo ba matla a electromotive bo lekana le makhetlo a mangata a phepelo ea motlakase, palo ea ho phethoha ha coil le phallo ea makenete.

The magnetic flux calculation formula Φ=B*S*COSθ, ha sefofane se nang le sebaka sa S se lebile ka lehlakoreng la matla a khoheli, angle θ ke 0, COSθ e lekana le 1, 'me foromo e fetoha Φ=B*S. .

Ho kopanya mekhoa e 'meli e ka holimo, u ka fumana mokhoa oa ho bala matla a khoheli a matla a motlakase: B=E/(4.44*f*N*S).

2) E 'ngoe ke foromo ea matla a Ampere. Ho tseba hore na coil e fumana matla a makae, re hloka foromo ena F=I*L*B*sinα, moo ke leng matla a hona joale, L ke bolelele ba conductor, B ke matla a khoheli, α ke angle pakeng tsa tataiso ea hona joale le tataiso ea matla a khoheli.Ha terata e le perpendicular ho matla a khoheli, foromo e fetoha F = I * L * B (haeba e le N-turn coil, magnetic flux B ke kakaretso ea magnetic flux ea N-turn coil, 'me ha ho na letho. hloka ho atisa N).

Haeba u tseba matla, u tla tseba torque. Torque e lekana le torque e atolositsoeng ke radius ea ketso, T = r * F = r * I * B * L (sehlahisoa sa vector).Ka mekhoa e 'meli ea matla = matla * lebelo (P = F * V) le lebelo la mola V = 2πR * lebelo ka motsotsoana (n metsotsoana), kamano le matla e ka thehoa, 'me mokhoa oa ho latela No. 3 o ka thehoa. fumana.Leha ho le joalo, hoa lokela ho hlokomeloa hore torque ea sebele ea tlhahiso e sebelisoa ka nako ena, kahoo matla a baloang ke matla a tsoang.

2. Mokhoa oa ho bala oa lebelo la AC asynchronous motor: n = 60f / P, sena se bonolo haholo, lebelo le lekana le makhetlo a mangata a phepelo ea motlakase, 'me le fapane ka tsela e fapaneng le palo ea lipara tsa palo (hopola para ) ea enjene, sebelisa feela foromo ka kotloloho.Leha ho le joalo, foromo ena ha e le hantle e lekanya lebelo la synchronous (lebelo la matla a khoheli a potolohang), mme lebelo la 'nete la koloi ea asynchronous le tla ba tlase hanyane ho feta lebelo la synchronous, kahoo hangata re bona hore koloi ea 4-pole hangata e feta 1400 rpm, empa ka tlase ho 1500 rpm.

3. Kamano pakeng tsa torque ea motlakase le lebelo la meter ea matla: T = 9550P / n (P ke matla a motlakase, n ke lebelo la motlakase), e ka fumanoang ho tsoa ho lintlha tsa No. 1 ka holimo, empa ha ho hlokahale hore re ithute ho etsa qeto, hopola palo ena A formula tla etsa.Empa hopola hape, matla a P ka foromo ha se matla a ho kenya, empa ke matla a tsoang. Ka lebaka la tahlehelo ea motlakase, matla a ho kenya ha a lekane le matla a tsoang.Empa hangata libuka li na le maikutlo a nepahetseng, 'me matla a ho kenya a lekana le matla a tlhahiso.

4. Matla a motlakase (matla a kentsoeng):

1) Mokhoa oa ho bala matla a motlakase oa karolo e le 'ngoe: P = U * I * cosφ, haeba matla a matla ke 0.8, motlakase ke 220V, 'me hona joale ke 2A, joale matla P = 0.22 × 2 × 0.8 = 0.352KW.

2) Mokhoa oa ho bala matla a motlakase oa mekhahlelo e meraro: P = 1.732 * U * I * cosφ (cosφ ke matla a matla, U ke motlakase oa mohala oa mojaro, 'me ke hona joale mohala oa mojaro).Leha ho le joalo, U le 'na tsa mofuta ona li amana le ho hokahanya ha motlakase. Ka ho hokahanya ha linaleli, kaha lipheletsong tse tloaelehileng tsa li-coil tse tharo tse arohaneng ke 120 ° voltage li kopantsoe hammoho ho theha ntlha ea 0, motlakase o kentsoeng holim'a coil ea mojaro ha e le hantle ke mohato-mohato. Ha mokhoa oa ho kopanya delta o sebelisoa, mohala oa motlakase o hokahanngoa pheletsong e 'ngoe le e' ngoe ea coil e 'ngoe le e' ngoe, kahoo motlakase oa coil ea mojaro ke motlakase oa mohala.Haeba motlakase o sebelisoang hangata oa 3-phase 380V o sebelisoa, coil ke 220V ka star connection, le delta ke 380V, P = U * I = U^ 2 / R, kahoo matla a ho hokahanya ha delta ke ho hokahanya ha linaleli ka makhetlo a 3, ke ka lebaka leo enjene ea matla a holimo e sebelisang naleli-delta ho theoha ho qala.

Ka mor'a ho tseba mokhoa o ka holimo le ho utloisisa ka botlalo, molao-motheo oa motlakase o ke ke oa ferekanngoa, leha e le hore u ka tšaba ho ithuta mokhoa o phahameng oa ho khanna koloi.

Likarolo tse ling tsa enjene

1) Fan: ka kakaretso e kenngoa mohatleng oa enjene ho tlosa mocheso ho enjene;

2) Lebokose la Junction: le sebelisetsoang ho hokahanya phepelo ea motlakase, joalo ka AC ea mekhahlelo e meraro ea asynchronous motor, e ka hokahanngoa le naleli kapa delta ho latela litlhoko;

3) Ho beha: ho hokahanya likarolo tse potolohang le tse emeng tsa enjene;

4. Sekoahelo sa ho qetela: Sekoahelo se ka pele le se ka morao ka ntle ho enjene se phetha karolo e tšehetsang.

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Nako ea poso: Jun-13-2022