Posankha fani kuti mugwiritse ntchito ndi avariable frequency motor (VFM), mfundo zingapo zofunika ziyenera kuganiziridwa kuti zitsimikizire kuti ntchito yabwino ndi yogwira ntchito bwino. Chimodzi mwazinthu zofunika kwambiri ndikutsata kwa magwiridwe antchito a fan ndi mota. Chokupizira chomwe chimagwira ntchito palokha chiyenera kuyamba injini isanayambe ndikutseka ndi kutseka injiniyo itazimitsa. Kutsatizana kumeneku kumathandizira kuwongolera mphamvu zamatenthedwe a mota, kulola kuti izizizirira bwino komanso kupewa kutenthedwa.
Mfundo ina yofunika ndikusintha mphamvu ya fani ndi liwiro potengera kapangidwe kake ka kutentha kwa injini. Izi zikutanthauza kuti faniyo iyenera kusintha momwe imagwirira ntchito kuti injiniyo ikhale mkati mwa kutentha kwake koyenera. Pochita izi, moyo ndi kudalirika kwa galimotoyo kumatha kuwonjezeka kwambiri, kuchepetsa chiopsezo cha kulephera msanga.
Kuchita kwaphokoso ndichinthu china chofunikira posankha wokondamakina osinthasintha komanso owongolera liwiro. Phokoso lopangidwa ndi ma mota litha kukhala vuto pamagwiritsidwe osiyanasiyana, makamaka m'malo okhala kapena ovuta. Kuti athetse vutoli, mulingo waphokoso wonse wagalimoto utha kukonzedwa pokhazikitsa mafani amtundu wocheperako. Mapangidwe awa nthawi zambiri amaphatikiza mawonekedwe monga mawonekedwe a masamba okongoletsedwa, zida zotsekereza mawu komanso njira zapamwamba zowongolera ma mota kuti achepetse phokoso logwira ntchito.
Posankha ma fan frequency motor fan, munthu ayenera kuganizira momwe amagwirira ntchito, kusintha mphamvu ndi liwiro molingana ndi mawonekedwegalimoto yamagetsikukwera kwa kutentha, komanso phokoso la makinawo kuti awonetsetse kuti galimotoyo ikuyenda bwino, modalirika, komanso mwakachetechete, motero kumapangitsa kuti magwiridwe antchito ndi ogwiritsa ntchito aziyenda bwino. Kukhutitsidwa.