Kusankha njira ya kukula kwa mphamvu yamagalimoto atatu asynchronous motor

Zotsatira za atatu-gawo asynchronous motorziyenera kusankhidwa molingana ndi mphamvu zomwe zimafunidwa ndi makina opanga, ndipo mota yamagawo atatu asynchronous iyenera kuyendetsedwa pansi pa katundu wovotera momwe mungathere. Posankha kukula kwa mphamvu ya injini, cholinga chake chiyenera kukhala choyenera.

Za kusankha njira ya mphamvu kukula kwamagawo atatu asynchronous induction ACmotor.

Kusankha gawo lachitatu la asynchronous motor yokhala ndi mphamvu yoyenera sikungawononge mphamvu yamagetsi kapena kulemetsa galimotoyo kwa nthawi yayitali. Ngati mphamvu ya injini ndi yochepa kwambiri. Chochitika cha "kagalimoto yaying'ono" chimachitika, zomwe zimapangitsa kuti mota ikhale yodzaza kwa nthawi yayitali, zomwe zimapangitsa kuti zinthu zotsekemera ziwonongeke ndi kutentha. Ngakhale injini itayaka, ngati mphamvu yagalimoto ndi yayikulu kwambiri, chodabwitsa cha "marathon chachikulu" chidzachitika. Mphamvu yake yotulutsa makina imatha kugwiritsidwa ntchito mokwanira, mphamvu yamagetsi ndi mphamvu sizokwera, komanso zimapanga mphamvu zamagetsi.

Njira 1: Gwiritsani ntchito chilinganizochi kuti muwerengere mphamvu yofunikira ndi gawo lachitatu la asynchronous motor:

1. Kwa njira yopitilira ntchito, mphamvu yolemetsa (ndiko kuti, mphamvu pa shaft yamakina) Pl (kW) imadziwika. Njira yotsatirayi ingagwiritsidwe ntchito powerengera mphamvu P (kW) ya injini: P = P1/n1 n2 Pamene n1 ndi mphamvu ya makina opangira ndipo n2 ndi mphamvu ya injini. Iyi ndiye mphamvu yotumizira.

Malingana ndi mphamvu zomwe zimapezedwa ndi ndondomeko yomwe ili pamwambayi, chifukwa mphamvu ndi zina siziyenera kukhala zolondola kwambiri, ndipo kutayika kwa mphamvu zamakina kumakhala ndi zosiyana zina, mphamvu yovotera ya galimoto yosankhidwa iyenera kukhala yofanana kapena yokulirapo pang'ono kuposa mphamvu yowerengedwa.

Ngati angalimoto yamagetsi ndi mphamvu ya 0,8 yasankhidwa, yesani kupeza ma kilowati angati omwe mphamvu yamagalimoto iyenera kukhala. Yankho: P = P1 / n1n2 = 3.95 / 0.7 * 0.8 = 7.1kW Popeza palibe ndondomeko ya 7.1kW, injini ya 7.5kW ya magawo atatu asynchronous imasankhidwa.

2. Kugwira ntchito kwakanthawi kochepa kovotera mota. Poyerekeza ndi galimoto ndi mphamvu yomweyo oveteredwa pa ntchito mosalekeza. Zigawo zing'onozing'ono, torque yayikulu kwambiri, komanso mtengo wotsika. Ngati mikhalidwe ikuloleza, gawo lachitatu la asynchronous motor yokhala ndi nthawi yochepa ya S2 iyenera kusankhidwa momwe mungathere.
3. Pamagawo atatu aasynchronous motors okhala ndi magwiridwe antchito a S3, sankhani kukula kwake. Malinga ndi kukula kwa kuchuluka kwa freewheeling, mota yamagawo atatu asynchronous yokhala ndi makina ogwiritsira ntchito a S3 amasankhidwa, omwe amagwiritsidwa ntchito mwapadera pakapita nthawi. Njira yowerengera katundu Fs% kupitiliza ndi Fs%=tg/(Tg+to)×100%, pomwe Tg ndi nthawi yogwira ntchito (unit: min), t ndi torque yoyimitsidwa (gawo: min); Tg ten mpaka ndi nthawi yozungulira (gawo: min)

Njira 2: Gwiritsani ntchito njira yofananira kuti musankhe mphamvu yamagalimoto amitundu itatu. Chomwe chimatchedwa fanizo, chomwe chikufanana ndi magwiridwe antchito agawo atatu asynchronous motor omwe amagwiritsidwa ntchito pamakina opangira ofanana.

Njira yeniyeni ndi: kumvetsetsa mphamvu zomwe zimagwiritsidwa ntchito ndi makina opangira ofanana pafupi ndi chipangizochi kapena mayunitsi ena, ndiyeno sankhani ma injini apafupi kuti agwire ntchito yoyesera. Ntchito yoyeserera idapangidwa kuti iwonetse ngati galimoto yosankhidwayo ikugwirizana ndi makina opanga. Njira yotsimikizira ndi: pangani chokweza chamagetsi kuyendetsa makina opanga kuti azigwira ntchito. Gwiritsani ntchito ammeter kuti muyeze momwe ma motor motor asynchronous akuyendera, ndikuyerekeza zotsatira zoyezera ndi zomwe zidavotera zomwe zafotokozedwa pa nameplate yamoto.

Njira 3: Njira yowunikira ndiyoyenera:

1. Ngati zenizeni zomwe zikugwira ntchito pagalimoto sizimapatuka kwambiri pakuwonetsa mwadzina. Izi zikusonyeza kuti ntchito ya galimoto yosankhidwa ndi yokwanira.
2. Ngati ntchito yeniyeni ya injiniyo ili pafupi ndi 70% yotsika kuposa yomwe idavotera pano yomwe yatchulidwa pa nameplate. Ndiye izo zikusonyeza kuti galimoto mphamvu kwambiri (ie "chonyamula chachikulu" ayenera m'malo ndi galimoto ndi mphamvu zochepa).
3. Ngati injini yoyezera yomwe ikugwira ntchito panopa ndi yoposa 40% kuposa mphamvu yamagetsi yomwe yatchulidwa pa nameplate. Izi zikusonyeza kuti mphamvu ya galimoto ndi yotsika kwambiri (ie "kagalimoto kakang'ono"), ndiko kuti, injini yaikulu yamagetsi iyenera kusinthidwa.