YFB4 mndandanda wa fumbi lophulika-umboni wa magawo atatu asynchronous motor ndi yotsekedwa kwathunthu-yozizira gologolo-cage atatu-gawo asynchronous mota. Zili ndi makhalidwe ang'onoang'ono, kulemera kwake, ntchito yodalirika, maonekedwe okongola, ndi zina zotero. Zimakhalanso ndi mphamvu zambiri, phokoso lochepa, kugwedezeka kwazing'ono komanso kutentha kwapansi. Ntchito yayikulu, yabwino kwambiri, yotsogola komanso yololera kuphulika, kugwiritsa ntchito kotetezeka komanso kodalirika, etc.