Ngemva kweminyaka ecishe ibe yi-10 yentuthuko, izimoto zikagesi zamandla amasha zenze ukunqwabelana okuthile kwezobuchwepheshe. Kunolwazi oluningi ekwakhiweni kwezingxenye zemoto kagesi kanye nokukhetha nokumataniswa kwezingxenye. Phakathi kwazo, ukuklanywa kwe-precharge resistor kumjikelezo we-precharge kudinga ukucabangela izimo eziningi nezimo zokusebenza. Ukukhethwa kwe-precharge resistor kunquma isivinini sesikhathi sokushajwa kwemoto, ubukhulu besikhala esithathwei-precharge resistor, kanye nokuphepha, ukwethembeka, nokuzinza kukagesi wemoto onamandla amakhulu.
I-precharge resistor iyi-resistor eshaja kancane kancane i-capacitor esigabeni sokuqala samandla aphezulu we-voltage yemoto. Uma singekho i-precharge resistor, amandla okushaja ngokweqile azophula i-capacitor. Ugesi we-high-voltage usetshenziswa ngokuqondile ku-capacitor, okulingana nesifunda esifushane esisheshayo. I-current short-circuit yamanje izolimaza izingxenye zikagesi eziphezulu ze-voltage.Ngakho-ke, i-resistor precharge kufanele inakwe lapho uklama isifunda ukuze kuqinisekiswe ukuphepha kwesifunda.
Kukhona izindawo ezimbili laphoprecharge resistorsasetshenziswa kumasekhethi kagesi aphakathi nendawo kanye naphezulu wezimoto zikagesi, okuyisekethi yokushajwa kwesilawuli semoto kanye nesekhethi yokushajwa kwesesekeli yamandla aphezulu kagesi. Kukhona i-capacitor enkulu kusilawuli se-motor (i-inverter circuit), edinga ukushajwa ngaphambili ukuze ulawule i-capacitor yokushaja yamanje. Izesekeli ezinama-voltage aphezulu ngokuvamile zifaka i-DCDC (i-DC converter), i-OBC (ishaja esebhodini), i-PDU (ibhokisi lokusabalalisa amandla kagesi aphezulu), iphampu kawoyela, iphampu yamanzi, i-AC (i-compressor air conditioning) nezinye izakhi, futhi kukhona. ama-capacitor amakhulu ngaphakathi kwezingxenye. , ngakho ukushajwa kwangaphambili kuyadingeka.
I-Precharge resistorsR, isikhathi sokushajwa ngaphambili T, kanye ne-precharge capacitor C edingekayo, isikhathi sokushajwa kuqala sivamise ukuthi izikhathi ezi-3 ukuya kwezi-5 ku-RC, futhi isikhathi sokushajwa ngaphambili ngokuvamile singama-millisecond. Ngakho-ke, ukushajwa kwangaphambili kungaqedwa ngokushesha futhi ngeke kuthinte isu lokulawula amandla emoto. Umbandela wokwahlulela ukuthi ukushajwa kwangaphambili kuqediwe ukuthi kufinyelela ku-90% wevoltage yebhethri yamandla (imvamisa kuba njalo). Lapho ukhetha i-resistor yokushajwa, kufanele kucatshangelwe lezi zimo ezilandelayo: amandla kagesi webhethri, i-contactor ikalwe yamanje, inani le-capacitor C, izinga lokushisa eliphakeme kakhulu le-ambient, ukukhuphuka kwezinga lokushisa kwe-resistor, i-voltage ngemva kokushajwa ngaphambi kwesikhathi, isikhathi sokushajwa, inani lokumelana nokushisa, amandla okushaya umoya. Ifomula yokubala yamandla okushaya kwenhliziyo iyingxenye yomkhiqizo wesikwele se-voltage ye-pulse kanye nenani lephoyinti le-C capacitance. Uma kuwukushaya kwenhliziyo okuqhubekayo, amandla aphelele kufanele abe isamba samandla awo wonke ama-pulses.
