Kodi mota ya slip ring imagwira ntchito bwanji? Mfundo yogwirira ntchito ya mota ya slip ring induction

Ma mota opindika, yomwe imadziwikanso kuti mawondo a rotor, ndi maziko a ambirintchito zotumizira zamagetsi amphamvu kwambiri.Amagwiritsidwa ntchito kwambiri m'mafakitale opangira zinthu zopangira zinthu mongamigodi, mafakitale a zinthu zopangira mchere or mafakitale omatiramonga simenti, miyala ya laimu, ndi gypsum m'njira zosiyanasiyana zopondera, kukanikiza ndi kupukuta. Amagwiritsidwanso ntchito m'mafani akuluakulu, mapampu, ndi ma conveyor.

Stator:

Kapangidwe ka stator ka ma motors a squirrel-cage ndi ma motors a slip-ring ndi komweko. Kusiyana kwakukulu kwa ma motors a slip-ring induction kuli mu kapangidwe ka rotor ndi momwe amagwirira ntchito. Pamene ma motors a slip-ring akugwiritsidwa ntchito mu cascade systems, kusintha kwina mu stator kungachitike chifukwa mphamvu ya injini imachokera ku mphamvu ya rotor ya motor ina ya slip-ring, komwe ma resistors akunja amayikidwa pa rotor yake.

Chozungulira:

Kodi mphete yopindika ndi chiyani? Mota ya mphete yopindika nthawi zambiri imakhala ndi rotor yokhala ndi stator ya gawo lovulala. Rotor yamtunduwu imakhala ndi kuzungulira kwa magawo atatu, komwe kumapangidwa ndi ma coil omwe amagwiritsidwa ntchito mu jenereta ya AC. Pakati pa rotor imapangidwa ndi zitsulo ndipo ili ndi mipata yolumikizira mizere itatu ya gawo limodzi. Mizere iyi imalekanitsidwa ndi magetsi ndi madigiri 120. Ngakhale stator itapindika m'magawo awiri, chiwerengero cha mizere ya stator yomwe imapindika pa rotor ndi chofanana ndi chiwerengero cha stator ndipo nthawi zonse chimakhala cha magawo atatu. Mizere itatu iyi imatsogozedwa kuchokera kumapeto ena mkati ndikulumikizidwa ku mphete zitatu zotenthetsera zomwe zimayikidwa pa rotor shaft yokha. Ma terminal atatuwa amalumikizana ndi mphete zitatu zopindika pogwiritsa ntchito maburashi a kaboni, omwe amakhazikika pa mphete ndi zigawo za masika. Maburashi atatu a kaboni awa amalumikizidwanso kunja kwa rheostat yolumikizira magawo atatu. Mzere wopindika ndi rheostat yakunja zimatha kuwonjezera kukana kwakunja kwa rotor circuit, zomwe zimapangitsa kuti ikhale ndi kukana kwakukulu panthawi yoyambira, motero imawonjezera mphamvu yoyambira. Munthawi yogwira ntchito bwino, mphete yolumikizira imangomaliza kuyendetsa kudzera mu mphete yachitsulo. Mphete yachitsulo imakankhidwira pa shaft, zomwe zimapangitsa kuti mphete zitatuzo zigwirizane. Kuphatikiza apo, maburashi amanyamuka okha kuchokera ku mphete yolumikizira kuti apewe kutayika ndi kuwonongeka. Munthawi yogwira ntchito bwino, ntchito ya rotor ya mphete yolumikizira ndi yofanana ndi ya rotor ya squirrel-cage.

Kodi chingachitike n’chiyani ngati choletsa chakunja chawonjezeredwa? Pankhani ya ma motors olowetsa mphamvu a squirrel-cage, kukana kwa rotor kumakhala kochepa kwambiri, kotero mphamvu yamagetsi mu rotor ndi yayikulu kwambiri, zomwe zimapangitsa kuti mphamvu yoyambira ikhale yoipa kwambiri. Komabe, ngati choletsa chakunja chawonjezeredwa pa ma motors olowetsa mphamvu, kukana kwa rotor kumawonjezeka poyambira, kotero mphamvu yamagetsi ya rotor ndi yotsika ndipo mphamvu yoyambira ndi yayikulu kwambiri. Kuphatikiza apo, kutsetsereka komwe kumafunika kuti pakhale mphamvu yamagetsi yayikulu kumagwirizana ndi kukana kwa rotor. Mu ma motors olowetsa mphamvu, powonjezera choletsa chakunja kuti chiwonjezere mphamvu ya rotor, kutsetsereka kumawonjezeka. Chifukwa cha kukana kwakukulu kwa rotor, kutsetsereka kumakhala kwakukulu, kotero ngakhale pa liwiro lotsika, mphamvu ya "kutulutsa" imatha kupezeka. Motoka ikafika pa liwiro lake loyambira (liwiro lonse), pamene choletsa chakunja chachotsedwa ndipo pansi pa mikhalidwe yabwinobwino yogwirira ntchito, njira yake yogwirira ntchito ndi yofanana ndi ya ma motors olowetsa mphamvu a squirrel-cage. Chifukwa chake, ma motors awa ndi oyenera kwambiri pa katundu wovuta kwambiri, womwe umafunikira mphamvu yamagetsi pafupifupi zero pa liwiro lotsika komanso kuthamanga mpaka liwiro lonse, ndipo umayamwa mphamvu yamagetsi yochepa kwambiri munthawi yochepa kwambiri.

Ubwino wa ma motors olowetsa mphete yotsetsereka:

Ubwino waukulu wa ma motors olowetsa mphete yotsetsereka ndi wakuti amathakulamulidwa mosavuta pa liwiro.Ngakhale pa liwiro lopanda liwiro, "torque yotulutsa" imatha kupezeka. Poyerekeza ndi ma motors oyambitsa ma squirrel-cage, ali ndi torque yoyambira yapamwamba kwambiri. Torque yodzaza ndi katundu wonse ndi pafupifupi 200-250% ya torque yodzaza ndi katundu wonse. Ma motors oyambitsa ma squirrel-cage amapanga 600-700% ya torque yodzaza ndi katundu wonse, koma starting current ya ma motors oyambitsa ma slip-ring ndi yotsika kwambiri, pafupifupi 250-350% ya torque yodzaza ndi katundu wonse.