N’chifukwa chiyani ma mota okhazikika a maginito ogwirizana ndi magetsi (permanent magnet synchronous motors) amagwira ntchito bwino kwambiri?

Galimoto yolumikizira maginito yokhazikikaMa PMM (ma PMM) atchuka kwambiri m'magwiritsidwe osiyanasiyana chifukwa cha kugwira ntchito kwawo bwino kwambiri poyerekeza ndi njira zamakono.mota yolowetsa magawo atatu a asynchronousChimodzi mwa zinthu zofunika kwambiri kuti ntchito ikhale yabwino ndi makhalidwe apadera a ma PMM, makamaka pa nthawi yomwe ntchito ikuyenda bwino.

Mota yokhazikika ya maginito yolumikizana imapangidwa ndi zigawo zitatu zazikulu: stator, rotor, ndi nyumba. Mofanana ndi muyezomota yolowetsa magawo atatu a ACs, pakati pa stator pamakhala ngati kapangidwe kokhala ndi laminated kuti achepetse kutayika kwa chitsulo komwe kumachitika chifukwa cha eddy current ndi hysteresis panthawi yogwira ntchito ya mota. Kuzungulira nthawi zambiri kumakhala kofanana ndi magawo atatu, ngakhale kusankha kwa magawo kumasiyana kwambiri. Gawo la rotor limapezeka m'njira zosiyanasiyana, kuphatikiza ma rotor okhazikika a maginito okhala ndi zitseko zoyambira za agologolo ndi ma rotor okhazikika a maginito okhazikika omwe ali mkati kapena pamwamba. Pakati pa rotor pakhoza kupangidwa ngati kapangidwe kolimba kapena kokhala ndi laminated. Rotor ili ndi zinthu zamaginito okhazikika, zomwe nthawi zambiri zimatchedwa chitsulo cha maginito.

Pa mota ya maginito yokhazikika, minda ya rotor ndi stator imakhala yogwirizana. Ntchito yogwirizana iyi imatanthauza kuti rotor imazungulira pa liwiro lomwelo ndi mphamvu ya maginito yozungulira yopangidwa ndi stator. Chifukwa chake, palibe mphamvu yoyambitsa mu gawo la rotor. Kusowa kwa mphamvu yoyambitsa kumeneku ndikofunikira chifukwa kumachotsa mitundu ingapo ya kutayika kwa mphamvu komwe nthawi zambiri kumapezeka m'mitundu ina ya mota.

Kuphatikiza apo, zinthu zozungulira zimawonongeka ndi hysteresis ndi eddy current pamene zimayankha kusintha kwa mphamvu ya maginito. Mosiyana ndi zimenezi, maginito okhazikika (PMMs) amataya pang'ono chifukwa chosowa mphamvu ya hysteresis ndi eddy current. Rotor imapangidwa ndi maginito okhazikika, omwe amapanga mphamvu ya maginito popanda kufunikira mphamvu yakunja, motero amaletsa kutayika ndi kutentha komwe kumayenderana nako. Kuphatikiza apo, kuchepetsa kutayika kwa rotor kumathandiza ma PMM kugwira ntchito bwino kwambiri, nthawi zambiri kupitirira 90%. Kuchita bwino kumeneku kumatanthauza kuchepetsa kugwiritsa ntchito mphamvu, kuchepetsa ndalama zogwirira ntchito, komanso kuchepa kwa kupanga kutentha, komwe kungatalikitse moyo wa mota ndi zigawo zake. Mwachidule, kugwira ntchito kogwirizana kwa minda ya rotor ndi stator mu mota ya maginito yokhazikika kumachotsa mafunde oyambitsidwa ndi kutayika komwe kumayenderana nako, zomwe zimapangitsa kuti ikhale yogwira mtima kwambiri kuposa mota yoyambitsa. Kuchita bwino kumeneku sikungowonjezera magwiridwe antchito, komanso kumathandizira kusunga mphamvu ndi kukhazikika m'mafakitale osiyanasiyana.