Kusiyana pakati pa Makina Osasinthasintha ndi Ogwirizana
Mu dziko la uinjiniya wamagetsi, makamaka mumakina amphamvu ndi ma drive amagetsi amakampani, mawu akuti makina osasinthasintha ndi ogwirizana nthawi zambiri amapezeka. Onsewa ndi makina osinthira magetsi (AC) omwe amagwira ntchito motsatira mfundo ya maginito ozungulira, koma amasiyana kwambiri pakupanga kwawo mphamvu, liwiro lozungulira, kapangidwe ka rotor, mawonekedwe ogwirira ntchito, ndi ntchito zamunda. Kumvetsetsa kusiyana kumeneku ndikofunikira kwambiri posankha makina oyenera katundu wanu, magwiridwe antchito, kuwongolera, ndi mtengo.
1. Kumvetsetsa Makina Osasinthasintha (Oyambitsa)
Makina osasinthasintha amadziwika bwino kuti ma induction motors. Mawu oti "asynchronous" amatanthauza kuti liwiro lozungulira la rotor silifanana ndi liwiro la mphamvu ya maginito yozungulira mu stator (yotchedwa synchronous speed). Makinawa amagwira ntchito kutengera induction ya electromagnetic: ma currents a rotor amayamba chifukwa cha kusiyana kwa liwiro pakati pa stator rotating field ndi rotor. Kusiyana kwa liwiro kumeneku kumatchedwa slip.
Ma injini oyambitsa magetsi amagwiritsidwa ntchito kwambiri chifukwa ndi osavuta kupanga, olimba, osavuta kusamalira, komanso otsika mtengo.
2. Tanthauzo la Makina Ogwirizana
Makina ogwirizana ndi makina a AC omwe rotor yake imazungulira pa liwiro lofanana ndi stator magnetic field, kotero amati ndi "synchronous." Kuti rotor "itsekedwe" ku stator magnetic field, iyenera kukhala ndi mphamvu yakeyake ya maginito, yomwe nthawi zambiri imapezeka kuchokera ku:
1. Mphamvu yotulutsa mphamvu ya DC (kudzera mu mphete zotsetsereka kapena chotulutsira cha brushless), kapena
2. Maginito okhazikika (mu maginito okhazikika ogwirizana ndi maginito).
Makina ogwirizanitsa amatha kugwira ntchito ngati ma mota komanso ma jenereta. Mu malo opangira magetsi , ma jenereta ogwirizanitsa ndi gawo lofunika kwambiri chifukwa nthawi zonse amapanga ma frequency ndi voltage malinga ndi liwiro lawo lozungulira.
3. Kusiyana kwa mfundo yogwirira ntchito : Slip vs. Synchronous Locked
Kusiyana kwakukulu kuli mu ubale pakati pa liwiro la rotor ndi liwiro la stator field.
– Mu makina osasinthasintha, rotor iyenera kutsalira pang'ono kumbuyo kwa liwiro losinthasintha kuti mafunde ayambe kugwedezeka mu rotor ndikupanga torque. Popanda kutsetsereka, palibe voltage yoyambitsidwa mu rotor, kotero palibe torque.
– Mu makina ogwirizana, rotor “imatseka” ku gawo lozungulira la stator. Ikalumikizana, liwiro lake limakhalabe lofanana pa ma frequency. gwero lamagetsi.
Mwachiganizo:
- Asynchronous: imafuna kutsetsereka kuti ipange torque
- Yogwirizana: palibe kutsetsereka komwe kumafunika panthawi yogwira ntchito yokhazikika
4. Liwiro Lozungulira ndi Kukhazikika kwa Liwiro
Liwiro la synchronous limatsimikiziridwa ndi mafupipafupi ndi chiwerengero cha ma pole:
\[
n_s = \frac{120 f}{P}
\]
kumene \(n_s\) ndi rpm, \(f\) ndi ma frequency (Hz), ndipo \(P\) ndi chiwerengero cha ma pole.
– Mota yolowetsa: liwiro lake lili pansi pang'ono pa (n_s), ndipo limasiyana malinga ndi katundu (katundu akalemera, kutsetsereka kwake kumawonjezeka, liwiro lake limachepa).
– Mota yolumikizana: liwiro lake ndi \(n_s\), silinasinthe ngakhale katundu atasintha (bola ngati sapitirira malire a torque, kapena "torque yotulutsa").
Choncho, ngati ntchitoyo ikufuna liwiro lokhazikika, mota yolumikizana nthawi zambiri imakhala yabwino kwambiri.
5. Kapangidwe ka Rotor: Khola la Squirrel vs Chisangalalo
Kusiyana kwa kapangidwe ka rotor ndikowonekeranso:
Chozungulira cha Makina Chosasinthasintha
Kawirikawiri amagwiritsa ntchito:
– Rotor ya khola la agologolo: mipiringidzo ya kondakitala imalumikizidwa ndi mphete zomaliza, yolimba ndipo imafuna kusamaliridwa kochepa.
- Palinso chozungulira cha bala kuti chisinthe mphamvu yoyambira kapena kuwongolera kwina.
Chozungulira cha Makina Chogwirizana
Rotor iyenera kukhala ndi gwero la mphamvu ya maginito:
- Rotor yozungulira mabala yokhala ndi DC yosangalatsa
- kapena rotor yokhala ndi maginito okhazikika
Chifukwa cha kukhalapo kwa makina osonkhezera, makina ogwirizana nthawi zambiri amakhala ovuta kwambiri ndipo amafunika kulamulira kwina.
6. Njira Yoyambira
Ma injini oyambitsa ndi osavuta kuyambitsa:
- Ikhoza kulumikizidwa mwachindunji ndi gwero (DOL) la kukula kochepa,
– kapena gwiritsani ntchito star-delta, autotransformer, soft starter, kapena inverter/VFD kuti muchepetse mphamvu yoyambira.
Ma mota ogwirizana ndi chinthu chovuta kuyambitsa chifukwa rotor "siyikugwirizana" poyamba:
- Ma mota ambiri ogwirizana amagwiritsa ntchito njira zoyambira monga damper winding, ma mota othandizira, kapena ma VFD kuti pang'onopang'ono awonjezere ma frequency kukhala ogwirizana.
Chifukwa chake, kuchokera kumbali yothandiza yoyambira, ma induction motors nthawi zambiri amakhala osavuta.
7. Mphamvu ndi Malamulo Othandizira
Ubwino wofunikira wa makina ogwirizana ndi mphamvu yake yowongolera mphamvu.
– Ma injini oyambitsa magetsi nthawi zambiri amakhala ndi mphamvu yotsalira (yoyambitsa magetsi), makamaka pa katundu wopepuka, chifukwa amafunika mphamvu yamagetsi yochokera pa netiweki.
- Ma mota ogwirizana amatha kuyendetsedwa ndi kusonkhezera kwawo:
– Wosasangalala kwambiri → wochedwa
- Wokondwa kwambiri → wotsogolera (akhoza kupereka mphamvu yogwira ntchito)
Chifukwa chake, ma mota ogwirizana nthawi zambiri amagwiritsidwa ntchito ngati ma condenser ogwirizana kuti akonze zinthu zamagetsi ndikuthandizira kulamulira mphamvu yamagetsi.
8. Kuchita Bwino ndi Kusamalira
Mwambiri:
– Ma injini olowetsa mpweya: amagwira ntchito bwino kwambiri, koma pali kutayika kwa ma rotor chifukwa cha mafunde oyambitsidwa ndi kutsetsereka. Pa ntchito zambiri, kugwira ntchito bwino ndi kwabwino kwambiri, makamaka m'mapangidwe amakono a IE3/IE4.
– Ma mota ogwirizana: amatha kukhala ndi mphamvu zambiri, makamaka ma mota ogwirizana ndi maginito okhazikika chifukwa safuna mphamvu ya rotor kuti ipangitse kuti zinthu ziyambe kuyenda bwino ndipo kutayika kwa rotor kumakhala kochepa.
Komabe, ma synchronous motors nthawi zambiri amakhala ndi:
- okwera mtengo kwambiri,
- njira zovuta kwambiri zowongolera ndi kusonkhezera,
- chisamaliro chingakhale chapadera kwambiri (makamaka pa chosinthira ndi dongosolo amplifier).
9. Mtengo ndi Kuvuta kwa Dongosolo
Kuchokera pa nkhani ya zachuma ndi kukhazikitsa:
– Makina osasinthasintha: otsika mtengo woyambira, osavuta kukhazikitsa, oyenera zosowa zamakampani onse.
– Makina ogwirizana: ndalama zoyambirira zimakhala zokwera chifukwa cha kusonkhezera, kulamulira, ndi kupanga rotor. Komabe, m'magwiritsidwe ena, kusunga mphamvu, kuwongolera mphamvu, ndi kukhazikika kwa liwiro zingapangitse kuti mtengo wonse wa umwini (TCO) ukhale wabwino kwambiri.
10. Ntchito Zonse mu Makampani
Mapulogalamu Osagwiritsa Ntchito Makina
- Mapampu, mafani, ma blowers
- Chonyamulira
- Chokompressor
- Makina opanga umum
Chifukwa chakuti ndi yolimba, yotsika mtengo, komanso yosavuta kugwiritsa ntchito, ma induction motors akhala "mota ya anthu" m'makampani.
Mapulogalamu a Makina Ogwirizana
- Majenereta m'mafakitale amagetsi (PLTU, PLTA, PLTG, PLTD yayikulu)
- Makina oyendetsera liwiro lokhazikika: ma compressor akuluakulu, mphero, ma crushers ena
- Kuwongolera mphamvu (condenser yogwirizana)
- Kugwiritsa ntchito bwino kwambiri: ma mota okhazikika a maginito ogwirizana m'makina amakono (ma HVAC apamwamba, magalimoto ena amagetsi, ndi mafakitale omwe amafuna magwiridwe antchito apamwamba)
Mapeto
Kusiyana kwakukulu pakati pa makina osasinthasintha ndi ogwirizana kuli mu ubale wa liwiro la rotor ndi liwiro la stator magnetic field. Makina osasinthasintha amafunika kutsetsereka kuti apange torque, kotero liwiro lawo limakhala pansi pang'ono pa liwiro logwirizana ndipo limasintha malinga ndi katundu. Pakadali pano, makina ogwirizana amazungulira chimodzimodzi pa liwiro logwirizana, kupereka liwiro lokhazikika komanso kuthekera kolamulira mphamvu kudzera mu chisangalalo.
Mwachidule, ma induction motors amapambana kwambiri pa kuphweka, kulimba, ndi mtengo, pomwe ma synchronous motors amapambana kwambiri pa kukhazikika kwa liwiro, kulamulira mphamvu zogwira ntchito, komanso kuthekera kogwira ntchito bwino kwambiri pazinthu zina. Kusankha kwabwino kumadalira zosowa zanu: kaya mtengo ndi kuphweka ndizo zinthu zofunika kwambiri, kapena magwiridwe antchito, magwiridwe antchito, ndi kuwongolera makina amagetsi ndiye zinthu zofunika kwambiri.
Ngati mukufuna, ndingakuthandizeni powonjezera tebulo loyerekeza mwachangu, chitsanzo cha kuwerengera liwiro logwirizana, kapena malangizo osankha injini pa chikwama china cha mafakitale.
