Ngemva kweminyaka ecishe ibe ngu-15 yentuthuko, izimoto zikagesi zamandla amasha zenze amadiphozithi athile obuchwepheshe. Ukukhethwa kwei-resistor yokushaja ngaphambiliinquma isivinini sesikhathi sokushaja imoto ngaphambi kwesikhathi, usayizi wesikhala esithathwe ukumelana nokushaja kwangaphambili, ukuphepha kukagesi we-voltage ephezulu yemoto, ukwethembeka nokuzinza.
Ukumelana ne-pre-charge kumandla wemoto ane-voltage ephezulu ku-capacitor ekuqaleni kokunensaukushaja resistor, uma singekho i-resistor yokushajwa ngaphambilini, ukushaja kwamanje kuzoba kukhulu kakhulu ukuphula i-capacitor. Amandla aphezulu-voltage angezwe ngqo ku-capacitor, okulingana ne-short-circuit esheshayo, i-short-circuit current ngokweqile izolimaza izingxenye zikagesi eziphezulu. Ngakho-ke, lapho uklama isifunda, ukumelana nokushaja kwangaphambili kufanele kucatshangelwe ukuze kuqinisekiswe ukuphepha kwesifunda.
Kunezindawo ezimbili kumjikelezo we-high-voltage wemoto kagesi lapho i-i-resistor yangaphambi kokushajakusetshenziswa, okuyisekethi yokushajwa kwangaphambili yesilawuli semoto kanye nesekhethi yokushaja yangaphambi kokushaja enevoltage ephezulu. Isilawuli se-motor (i-inverter circuit) sine-capacitor enkulu, edinga ukushajwa ngaphambili ukuze ulawule i-capacitor yokushaja yamanje.
Ngokuvumelana nokuqinisekiswa komklamo wangempela okutholiwe: i-ceramic resistor iyi-precharge esebenzayo, ukukhishwa nezinye izidingo. Inamandla okushisa athile aphezulu futhi ikwazi ukumunca amandla aphezulu ngesikhathi ishajwa ngaphambilini ngesikhathi esifushane.
