Momwe Chosinthira Choyimitsa cha OTIS OVF20 Chimagwirira Ntchito

Chosinthira cha OTIS OVF20 chimagwira ntchito yofunika kwambiri m'makina amakono a elevator, kuonetsetsa kuti ntchito yake ndi yosalala komanso yotetezeka. Ntchito yake yayikulu ndikusintha mphamvu ya AC yomwe imaperekedwa ku elevator kukhala mphamvu yoyendetsedwa bwino, yosinthasintha ya AC yomwe imayendetsa mota bwino.

Njirayi imayamba ndi mphamvu ya AC yomwe ikubwera, kaya 380V kapena 220V, yomwe poyamba imasinthidwa kukhala voltage ya DC ndi makina osinthira mkati mwa inverter. Voltage iyi ya DC imakhazikika ndi ma capacitor mu DC circuit kuti ipereke mphamvu yokhazikika. Kenako inverter imagwiritsa ntchito njira ya pulse-width modulation (PWM) kuti isinthe DC yokonzanso iyi kukhala voltage ya AC yokhala ndi ma frequency osinthika, ndikumaliza njira ya inverter.

Mkati mwa OVF20, gawo loyamba lomwe limawonekera mukatsegula chivundikiro chakutsogolo ndi Motion Control Board II (MCBII). Monga momwe dzina lake likusonyezera, bolodi ili lili ndi udindo wowongolera kayendedwe ka elevator. Limagwira ntchito ngati cholumikizira cha zizindikiro zonse zolowera ndi zotuluka za OVF20 ndipo limagwiritsa ntchito zizindikirozi kuti zitsimikizire kuti zikugwira ntchito molondola.

Dongosolo lowongolera elevator—monga LBII, LCBII, kapena ma board ena owongolera—limatumiza malamulo othamanga ku MCBII. MCBII imakonza malamulowa pamodzi ndi zizindikiro zina zokwezera, kuphatikizapo ma circuits oteteza. Kenako imatumiza zizindikiro zowongolera ku Power Drive Board (PDB), yomwe imayang'anira ma transistors amphamvu kwambiri mkati mwa inverter kuti ipange kusintha kwenikweni kwa AC. Kwenikweni, PDB imachita kusintha kwa mphamvu kwa inverter motsogozedwa ndi MCBII.

Kuti ntchito igwire bwino ntchito, MCBII imalandiranso mayankho kuchokera ku sensa ya liwiro la PVT. Poyerekeza liwiro lenileni la elevator ndi liwiro lolamulidwa, MCBII imasintha mphamvu ya injini kuti isunge kuyenda kosalala komanso kodalirika. Mizere iwiri yowonjezera kuchokera ku inverter imapereka mayankho a mphamvu ku MCBII ngati gawo la chitetezo chamkati cha inverter. Ngati mphamvu yotulutsa ipitirira mtengo wovomerezeka, inverter idzayambitsa kutseka koteteza.

Pomaliza, OVF20 ili ndi makina oletsa mabuleki. Choletsa ichi chimagwiritsidwa ntchito kuchepetsa mphamvu ya elevator, kusintha mphamvu yochulukirapo kukhala kutentha kuti zitsimikizire kuti imayima bwino komanso motetezeka.

Ponseponse, chosinthira cha OTIS OVF20 chimaphatikiza kuwongolera kolondola kwa mayendedwe, mayankho enieni, ndi njira zotetezera kuti zipereke magwiridwe antchito odalirika a elevator amakono.

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