Chifukwa chiyani magineti okhazikika amagwira bwino ntchito?

Permanent maginito synchronous motor imapangidwa makamaka ndi stator, rotor ndi zida zanyumba. Monga ma motors wamba a AC, stator pachimake ndi mawonekedwe opangidwa ndi laminated kuti achepetse kutayika kwachitsulo chifukwa cha eddy pano komanso zotsatira za hysteresis panthawi yagalimoto; ma windings nawonso nthawi zambiri amakhala magawo atatu symmetrical nyumba, koma chizindikiro kusankha ndi kosiyana kwambiri. Gawo la rotor lili ndi mitundu yosiyanasiyana, kuphatikiza maginito okhazikika okhala ndi mazenera oyambira agologolo, ndi ma rotor omangidwa kapena okwera pamwamba. Pakatikati pa rotor imatha kupangidwa kukhala cholimba kapena laminated. Rotor ili ndi maginito okhazikika, omwe nthawi zambiri amatchedwa chitsulo cha maginito.

Pansi pa ntchito yanthawi zonse ya injini yamagetsi yanthawi zonse, rotor ndi maginito a stator ali mumkhalidwe wolumikizana, palibe chomwe chimapangidwira pagawo la rotor, palibe kutayika kwa mkuwa wa rotor, hysteresis, ndi kutayika kwa eddy pano, ndipo palibe chifukwa. kuganizira vuto la kutayika kwa rotor ndi kupanga kutentha. Nthawi zambiri, injini yamagetsi yokhazikika imayendetsedwa ndi chosinthira chapadera, ndipo mwachilengedwe imakhala ndi ntchito yoyambira yofewa. Kuphatikiza apo, injini yamagetsi yokhazikika ndi injini yolumikizirana, yomwe imakhala ndi mawonekedwe osinthira mphamvu yamagetsi yama synchronous motor kudzera mumphamvu yachisangalalo, kotero mphamvuyo imatha kupangidwa kuti ikhale yamtengo wapatali.

Kuchokera pamalingaliro oyambira, chifukwa chakuti maginito okhazikika amagetsi amayambitsidwa ndi ma frequency frequency magetsi kapena othandizira ma frequency converter, njira yoyambira ya maginito okhazikika ndiyosavuta kuzindikira; mofanana ndi chiyambi cha injini yafupipafupi yamagetsi, imapewa zofooka zoyambira zamtundu wamba wamtundu wa asynchronous motor.

Mwachidule, mphamvu ndi mphamvu ya maginito okhazikika a maginito amatha kufika pamwamba kwambiri, ndipo mapangidwe ake ndi ophweka. Msikawu wakhala ukutentha kwambiri zaka khumi zapitazi.

Komabe, kulephera kwa demagnetization ndivuto losapeŵeka kwa maginito okhazikika amagetsi. Pamene panopa ndipamwamba kwambiri kapena kutentha kwambiri, kutentha kwa ma windings oyendetsa galimoto kumakwera nthawi yomweyo, zamakono zidzawonjezeka kwambiri, ndipo maginito okhazikika adzataya maginito awo mofulumira. Mu okhazikika maginito kulamulira galimoto, ndi overcurrent chitetezo chipangizo waikidwa kuti apewe vuto la galimoto stator mapiringidzo akuwotchedwa, koma chifukwa imfa ya magnetization ndi kuzimitsa zida ndi zosapeweka.

Poyerekeza ndi ma mota ena, kugwiritsa ntchito ma motors okhazikika pamsika sikudziwika kwambiri. Pali ena osadziwika luso akhungu mawanga kwa onse opanga magalimoto ndi ogwiritsa, makamaka pankhani yofananira ndi pafupipafupi converters, amene nthawi zambiri kumabweretsa kupanga Mtengowo kwambiri sagwirizana ndi deta experimental ndipo ayenera kutsimikiziridwa mobwerezabwereza.