Ukulahleka kwesistimu ye-excitation kuyakhululeka futhi ukusebenza kahle kuyathuthukiswa;izinga eliphelele lokonga amandla ngu-10-50%.
I-excitation winding ne-excitation power supply iyakhululeka, isakhiwo silula futhi ukusebenza kunokwethenjelwa.
Imoto kazibuthe yomhlaba engavamile ihlangene ngesakhiwo, incane ngosayizi futhi ilula ngesisindo;isisekelo sincishiswa ngamasayizi angu-1-2.
Ubukhulu nokuma kwe-motor kuyaguquguquka futhi kuhlukahlukene;ngokwezifiso okungajwayelekile kungenzeka.