Mamhanyiro emota yekutyaira mota anowanzo fararira, asi nguva pfupi yadarika ndakasangana neprojekti yemotokari yeinjiniya uye ndikanzwa kuti zvinodiwa nemutengi zvakanyanya.Hazvina kunaka kutaura iyo chaiyo data pano.Kazhinji, simba rakayerwa imazana akati wandei kilowatts, kasipidhi yakayerwa i n(N), uye iyo yakanyanya sipidhi n(max) yesimba rinogara riripo ringangoita 3.6 nguva yen(N);mota haina kuongororwa nekumhanya kwakanyanya.simba, izvo zvisina kukurukurwa munyaya ino.
Iyo yakajairika nzira ndeyekuwedzera yakayerwa kumhanya nenzira kwayo, kuitira kuti huwandu hwekumhanya kwesimba nguva dzose huve hudiki.Izvo zvakashata ndezvekuti iyo voltage paiyo yekutanga yakatemerwa yekumhanyisa point inoderera uye ikozvino inova yakakura;zvisinei, tichifunga kuti ikozvino yemotokari yakakwirira pakumhanya kwakaderera uye torque yakakwirira, zvinowanzogamuchirwa kushandura nzvimbo yakarongwa yekumhanya seizvi.Nekudaro, zvinogona kunge zviri izvo indasitiri yemotokari yakaoma zvakanyanya.Mutengi anoda kuti yazvino inofanira kunge isina kuchinjika mukati menguva dzese simba renji, saka isu tinofanirwa kufunga dzimwe nzira.
Chinhu chekutanga chinouya mupfungwa ndechekuti sezvo simba rekubuda risingakwanise kusvika kune yakayerwa simba mushure mekupfuura iyo yakanyanya kumhanya point n(max) yesimba rinogara riripo, tobva tadzikisa simba rakayereswa zvakakodzera, uye n(max) ichawedzera (inonzwa. zvakada kufanana neNBA superstar "haigone kurova Just join", kana kubva watadza bvunzo nemapoinzi makumi mashanu nesere, wobva waisa mutsara wekupasa pamapoinzi makumi mashanu), izvi ndezvekuwedzera huwandu hwemota kuvandudza kugona kwekumhanya.Semuyenzaniso, kana tikagadzira mota ye100kW, tozomaka simba rakayereswa se50kW, simba rinogara riripo haringavandudzwe here?Kana 100kW ichikwanisa kudarika kumhanya nekaviri, harisi dambudziko kupfuudza sipidhi kanenge ka3 pa50kW.
Zvechokwadi, pfungwa iyi inogona kungogara muchikamu chekufunga.Wese munhu anoziva kuti huwandu hwemota dzinoshandiswa mumotokari dzakanyanya kushomeka, uye panenge pasina nzvimbo yesimba repamusoro, uye kudzora mutengo kwakakoshawo.Saka nzira iyi haisati yakwanisa kugadzirisa dambudziko chairo.
Ngatinyatso funga kuti iyi inflection point inorevei.Pa n(max), simba guru ndiro simba rakayerwa, kureva kuti, torque yakawanda yakawanda k(T)=1.0;kana k(T)> 1.0 pane imwe nhanho yekumhanya, zvinoreva kuti inogara iine simba rekuwedzera simba.Saka ichokwadi here kuti hombe k(T) ndeye, kusimba kwesimba rekuwedzera kukurumidza kuri?Chero bedzi k(T) panzvimbo n(N) yekumhanya yakayerwa yakagadzirwa yakakura zvakakwana, simba rinogara riripo rekumhanyisa regulation regu re3.6 times ringagutsikane here?
Kana iyo voltage yatemerwa, kana iyo leakage reactance ikaramba isina kuchinjika, iyo yakanyanya torque inopindirana nekumhanya, uye iyo yakanyanya torque inoderera sezvo kumhanya kunowedzera;muchokwadi, iyo leakage reactance zvakare inochinja nekumhanya, iyo ichakurukurwa gare gare.
Iyo yakayerwa simba (torque) yemota yakanyatso hukama kune akasiyana zvinhu zvakaita seyero yekudzivirira uye kupisa kwekupisa mamiriro.Kazhinji, iyo torque yakakura ndeye 2 ~ 2.5 nguva yakayerwa torque, kureva, k(T)≈2 ~ 2.5.Sezvo simba remota richiwedzera, k(T) inodzikira.Kana iro simba rinogara richichengetwa pakumhanya n(N) ~n(max), zvinoenderana neT=9550*P/n, hukama huripo pakati peiyo torque yakayerwa uye nekumhanya kwakapesanawo.Saka, kana (ona kuti iyi ndiyo subjunctive mood) iyo leakage reactance haina kuchinja nekumhanya, iyo yakanyanya torque yakawanda k(T) inoramba isina kuchinjika.
Muchokwadi, isu tese tinoziva kuti reactance yakaenzana neyakagadzirwa inductance uye angular velocity.Mushure mekunge mota yapedzwa, iyo inductance (leakage inductance) inenge isingachinji;kumhanya kwemota kunowedzera, uye kudonhedza kweiyo stator uye rotor kunowedzera zvakaenzana, saka kumhanya uko iyo yakanyanya torque inodzikira inokurumidza kupfuura yakayerwa torque.Kusvika n(max), k(T)=1.0.
Zvakawanda zvakurukurwa pamusoro, kungotsanangura kuti kana voltage ichigara, maitiro ekuwedzera kumhanya ndiyo maitiro e kT ari kuderera zvishoma nezvishoma.Kana iwe uchida kuwedzera simba rinogara richimhanya renji, unofanirwa kuwedzera k(T) pakumhanya kwakayerwa.Muenzaniso n(max)/n(N)=3.6 muchinyorwa chino hazvireve kuti k(T)=3.6 inokwana pakumhanya kwakayerwa.Nekuti kurasikirwa kwekukwenya kwemhepo uye kurasikirwa kwesimbi kwepakati kwakakura pakumhanya kwakanyanya, k(T)≥3.7 inodiwa.
Iyo yakanyanya torque inenge yakatarisana nehupamhi hweiyo stator uye rotor leakage reactance, kureva.
1. Kuderedza nhamba yevatungamiri mumutsara wechikamu chimwe nechimwe che stator kana kureba kwesimbi yesimbi kunonyanya kushanda pakubuda kwemvura ye stator uye rotor, uye inofanira kupiwa pakutanga;
2. Wedzera nhamba ye stator slots uye kuderedza chaiyo leakage permeance ye stator slots (magumo, harmonics), iyo inoshanda kune stator leakage reactance, asi inosanganisira maitiro akawanda ekugadzira uye inogona kukanganisa mamwe maitiro, saka zvinokurudzirwa kuva. cautious;
3. Kune akawanda cage-type rotors anoshandiswa, kuwedzera nhamba ye rotor slots uye kuderedza chaiyo leakage permeance ye rotor (kunyanya chaiyo leakage permeance ye rotor slots) inoshanda kune rotor leakage react uye inogona kushandiswa zvizere.
Kune iyo chaiyo yekuverenga formula, ndapota tarisa kune chinyorwa "Motor Dhizaini", iyo isingazodzokororwe pano.
Medium uye high-power motors kazhinji ane mashoma ekutendeuka, uye zvishoma zvigadziriso zvine simba guru pakuita, saka kunyatsogadzirisa kubva kudivi rerotor kunowedzera kuitika.Kune rimwe divi, kuti uderedze pesvedzero yefrequency kuwedzera pakurasikirwa kwepakati, matete epamusoro-giredhi silicon simbi mapepa anowanzo kushandiswa.
Zvinoenderana neiyo iri pamusoro zano dhizaini dhizaini, iyo yakaverengerwa kukosha yasvika mutengi tekinoroji zvinodiwa.
PS: Ndine urombo kune yepamutemo account watermark inovhara mamwe mavara mufomula.Neraki, aya mafomula ari nyore kuwana mu "Electrical Engineering" uye "Motor Dhizaini", ndinovimba haizokanganisa kuverenga kwako.
Nguva yekutumira: Mar-13-2023