Phase-to-phase fault ndi vuto lamagetsi la magawo atatu a ma motor windings. Kuchokera ku ziwerengero za magalimoto olakwika, zingapezeke kuti ponena za zolakwa za gawo-ndi-gawo, mavuto a ma motors awiri amakhala ochepa kwambiri, ndipo ambiri a iwo amapezeka kumapeto kwa ma windings.

Kuchokera pa kagawidwe ka ma koyilo omangira ma mota, kutalika kwa ma koyilo omangira ma mota a mapole awiri ndi okulirapo, ndipo mawonekedwe omaliza ndi vuto lalikulu pakuyika mawaya. Komanso, ndizovuta kukonza kutsekemera kwa gawo ndi gawo ndikumanga ma windings, ndipo kusuntha kwa gawo ndi gawo kumatha kuchitika. funso.

Panthawi yopanga, opanga ma mota okhazikika amawona zolakwika za gawo-to-gawo kudzera mu njira yolimbana ndi magetsi, koma malire owonongeka sangapezeke pakuwunika kwa magwiridwe antchito komanso kuyesa kosanyamula katundu. Zoterezi zimatha kuchitika pomwe mota ikugwira ntchito monyanyira.

Mayeso onyamula magalimoto ndi mtundu woyeserera, ndipo mayeso okhawo osanyamula katundu amachitidwa panthawi ya mayeso a fakitale, chomwe ndi chimodzi mwazifukwa zomwe zimachititsa kuti galimotoyo ichoke pafakitale ndi mavuto. Komabe, potengera kuwongolera kwaukadaulo, tiyenera kuyamba ndi kukhazikika kwa njirayo, kuchepetsa ndikuchotsa ntchito zoyipa, ndikutenga njira zolimbitsira mitundu yosiyanasiyana yokhotakhota.

Chiwerengero cha ma pole awiri a injini

Seti iliyonse ya ma coils a mota ya magawo atatu a AC ipanga mitengo ya maginito ya N ndi S, ndipo kuchuluka kwa mitengo yamaginito yomwe ili mugawo lililonse la mota iliyonse ndi kuchuluka kwa mitengo. Popeza mitengo ya maginito imawoneka pawiri, mota ili ndi 2, 4, 6, 8 ... mitengo.

Pamene pali koyilo imodzi yokha mu gawo lililonse mapindikidwe a A, B, ndi C magawo, amene wogawana ndi symmetrically anagawira pa circumference, kusintha panopa kamodzi, ndi kasinthasintha maginito kutembenukira mozungulira kamodzi, amene ndi mizati. Ngati gawo lililonse la A, B, ndi C magawo atatu omangirira ali ndi ma koyilo awiri motsatizana, ndipo kutalika kwa koyilo iliyonse ndi bwalo la 1/4, ndiye kuti mphamvu ya maginito yopangidwa ndi magawo atatu ikadali yozungulira. maginito, ndi kusintha panopa kamodzi , kasinthasintha maginito kutembenukira kokha 1/2 kutembenukira, amene 2 mapeyala mizati. Momwemonso, ngati ma windings amakonzedwa molingana ndi malamulo ena, ma 3 awiri a mizati, 4 mapeyala a mizati kapena kawirikawiri, P pawiri ya mitengo ingapezeke. P ndi logarithm yamtengo.

Magalimoto asanu ndi atatu amatanthawuza kuti rotor ili ndi mitengo 8 ya maginito, 2p = 8, ndiko kuti, injiniyo ili ndi mapeyala 4 a maginito. Nthawi zambiri, ma jenereta a turbo ndi ma motors obisika, okhala ndi ma pole awiri ochepa, nthawi zambiri 1 kapena 2 pairs, ndi n=60f/p, kotero liwiro lake ndi lalitali kwambiri, mpaka 3000 revolutions (ma frequency amphamvu), ndi kuchuluka kwa mitengo ya jenereta ya hydroelectric ndi yayikulu kwambiri, ndipo mawonekedwe a rotor ndi mtundu wamtengo wapatali, ndipo njirayi ndi yovuta. Chifukwa cha kuchuluka kwa mitengo, liwiro lake ndi lotsika kwambiri, mwina kungosintha pang'ono pamphindikati.

Kuwerengera liwiro la motor synchronous

Liwiro la synchronous la motor limawerengedwa molingana ndi formula (1). Chifukwa cha kutsetsereka kwa injini ya asynchronous, pali kusiyana kwina pakati pa liwiro lenileni la mota ndi liwiro lolumikizana.

n=60f/p………………………(1)

Mu formula (1):

n - liwiro la injini;

60 - amatanthauza nthawi, masekondi 60;

F--mafupipafupi amphamvu, ma frequency amphamvu m'dziko langa ndi 50Hz, ndipo ma frequency amphamvu m'maiko akunja ndi 60 Hz;

P——chiwerengero cha mapolo awiri a mota, monga mota ya 2-pole, P=1.

Mwachitsanzo, kwa injini ya 50Hz, liwiro la synchronous la 2-pole (1 pair of pole) motor ndi 3000 rpm; Liwiro la 4 mzati (2 mapeyala a mitengo) galimoto ndi 60×50/2 = 1500 rpm.

Pankhani ya mphamvu yotulutsa nthawi zonse, kuchuluka kwa ma pole awiri a mota, kutsika kwa liwiro la mota, koma ndikokulirapo. Chifukwa chake, posankha mota, ganizirani kuchuluka kwa ma torque omwe amafunikira.

Mafupipafupi a magawo atatu akusinthana pano m'dziko lathu ndi 50Hz. Chifukwa chake, liwiro lolumikizana la mota ya 2-pole ndi 3000r / min, liwiro lolumikizana la mota ya 4-pole ndi 1500r / min, liwiro lolumikizana la mota ya 6-pole ndi 1000r/min, komanso liwiro lolumikizana 8-pole motor ndi 750r/min, Liwiro lofananira la mota 10-pole ndi 600r/min, ndipo liwiro lolumikizana la mota 12-pole ndi 500r/min.

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Nthawi yotumiza: Apr-08-2023