Emva kweminyaka eyi-15 yophuhliso, iimoto zombane zamandla amatsha zenze iidipozithi zobugcisa.Ukhetho lweisixhasi sokutshaja kwangaphambiliinquma isantya sexesha lokutshaja kwangaphambili kwesithuthi, ubungakanani besithuba esithathwe ngokuchasa ukutshaja kwangaphambili, ukhuseleko lombane oluphezulu lwesithuthi, ukuthembeka kunye nokuzinza.
Ukuchasana kwangaphambi kokutshaja kukwisithuthi samandla aphezulu-voltage kwi-capacitor ekuqaleni kokucothaukutshaja isixhasi, ukuba akukho mxhasi we-pre-charge, umbane wokutshaja uya kuba mkhulu kakhulu ukuphula i-capacitor.Amandla aphezulu ombane afakwe ngokuthe ngqo kwi-capacitor, elingana ne-short-circuit ngokukhawuleza, i-short-circuit current egqithisileyo iya kulimaza amacandelo ombane aphezulu.Ngoko ke, xa uqulunqa isiphaluka, ukuchasana kwangaphambi kokutshaja kufuneka kuthathelwe ingqalelo ukuze kuqinisekiswe ukhuseleko lwesiphaluka.
Kukho iindawo ezimbini kwisekethe ephezulu-voltage yesithuthi sombane apho iisixhasi sangaphambi kwentlawuloisetyenziswa, leyo isilawuli semotor pre-charge circuit kunye ne-high-voltage accessory pre-charge circuit.Umlawuli we-motor (inverter circuit) une-capacitor enkulu, ekufuneka ihlawulwe kwangaphambili ukulawula i-capacitor yokutshaja okwangoku.
Ngokweyona ngqinisiso yoyilo olufunyenweyo: isixhasi se-ceramic sisesona sixhobo sokutshajiswa kwangaphambili, ukukhutshwa kunye nezinye iimfuno.Inomthamo ophezulu wobushushu obuthile kwaye inokufunxa amandla aphezulu ngexesha lokutshaja kwangaphambili ngexesha elifutshane.
