Nkhani yolemba Chris Kinsfather |Marichi 20, 2017 |Magalimoto a AC |
Dziko lowongolera magalimoto likhoza kukhala losokoneza motsimikiza.Ndi kusinthasintha kwa mawu, tanthauzo lenileni la VFD (Variable Frequency Drive) nthawi zina limatha kusokonezedwa ndi mawu akuti INVERTER.Kuti timvetse bwino chifukwa chake kugula VFD kungakhale kapena kusakhala njira yabwino yothetsera vutolo, tikufuna tiyambe ndi tanthauzo lalifupi komanso losavuta kumva la chomwe VFD ilidi.
VFD ndi chipangizo chamagetsi komanso chamagetsi chomwe chili ndi cholinga chofuna:
● Kutenga mphamvu ya AC kumbali yopereka
● Kutembenuza mphamvuyo kukhala voteji ya DC
● Kusunga voteji mu VFD
● Pogwiritsa ntchito umisiri wamkati waukadaulo wosinthira mwachangu kwambiri wotchedwa IGBT'S womwe ungapange mawonekedwe a 'sine wave-like' omwe angasinthidwe mwa “kusintha ma frequency a 60 HZ” kukhala mtengo wina, potero kusintha liwiro la 3 phase inductive kapena nthawi zina PM mtundu motor.
Zikumveka zosavuta pomwe?Osachepera zipolopolo zitatu zoyambirira zidatero… koma apa ndipamene zinthu zitha kukhala zovuta.Ngakhale zili zowona kuti VFD "Invert" mzere wa AC wapano, zomwe zimapangidwa ndi VFD SI mafunde oyera a AC sine.Ndikutanthauza chiyani pamenepa?Apa ndi pamene timakonda kukumana ndi chisokonezo.Ndichikhulupiliro chofala kuti VFD imapanga mawonekedwe oyera a AC sine monga ROTARY PHASE CONVERTER (RPC), zomwe sizili choncho.
Zomwe VFD imapereka kwenikweni ndi mawonekedwe a sine wave kudzera (PWM) pulse wide modulation.Kutulutsa kwa PWM kumangoyendetsedwa ndi mafunde a DC.Mu mawonekedwe obisika awa, china chake chonga AC INDUCTION motor sichingathe kusiyanitsa mafunde a AC ndi DC.
Cholinga chonse kumbuyo kwa chipangizochi sichinthu choposa kufananitsa maulendo ofunikira ofunikira pakugwiritsa ntchito.Izi zitha kusiyana ndi makina otumizira, makina amakupiza / zowombera pofuna kukakamiza kapena kuyenda, liwiro lofunikira pazitsulo zopangira makina opangira makina ndi mitundu ina yambiri yomangira yomwe imagwiritsidwa ntchito m'mitundu yonse yamakampani.
Komabe, ndi chifukwa chake chomwe VFD singagwiritsidwe ntchito ngati "GENERAL POWER SUPPLY" kuwongolera makina, makamaka MOTOR SPEED CONTROLLER.Kugwiritsa ntchito molakwika cholinga ichi kungayambitse kulephera kwa zida kapena VFD.
Ndi mapulogalamu ati omwe VFD SINGAgwiritsidwe ntchito?
● Katundu wosamva (Zowotcherera, Ovuni, Mahiatha, ndi zina)
● Ma motor Traditional 1 Phase okhala ndi zipewa
● Zida zokhala ndi gulu lalikulu lolamulira ndi (kugawa kwamkati) kuyesa kugwiritsa ntchito VFD ngati magetsi.
● Kugwiritsa ntchito VFD pamakina okhala ndi ma switch olumikizidwa mwachindunji ku mota (VFD iyenera kulumikizidwa mwachindunji ndi injini) Magawo otsegula amayatsa moto mwachitsanzo.
Mwachidule, munthu ayenera kugwiritsa ntchito RPC kuwongolera makina onse ngati akufunika mphamvu ya magawo atatu ndikugwiritsa ntchito VFD ngati akufunadi kuwongolera liwiro lagalimoto ndipo amalumikizana mwachindunji ndi injini yolumikizira ya AC yomwe imatha kuthana ndi mawonekedwe a mafunde monga momwe amaperekera Woyang'anira VFD.Pogwiritsa ntchito malingaliro osavuta awa, munthu sadzakhalanso ndi vuto la zida.
Chris Kinsfather
Nthawi yotumiza: Oct-19-2022