Mu 1895, German Overtone inatulutsa yoyamba padziko lonse lapansiKubowola kwamagetsi kwa DC. Chigobacho chimapangidwa ndi chitsulo chosungunuka ndipo chimatha kuboola mabowo 4mm mu mbale yachitsulo. Pambuyo pake, kubowola kwamagetsi kwa magawo atatu (50Hz) kunawoneka, koma liwiro lagalimoto silinapitirire 3000r/min. Mu 1914, zida zamagetsi zoyendetsedwa ndi ma motors agawo limodzi zidawoneka, ndipo liwiro lagalimoto lidafika kupitilira 10000r / min. Mu 1927, chida chamagetsi chapakati chapakati chokhala ndi ma frequency a 150 mpaka 200 Hz chinawonekera. Sikuti ali ndi mwayi mkulu liwiro la single-gawo mndandanda galimoto, komanso ali ndi ubwino yosavuta ndi odalirika atatu gawo mphamvu pafupipafupi galimoto. Komabe, iyenera kuperekedwa ndi ma frequency apakati. , Kugwiritsa ntchito ndikoletsedwa.