Abahlinzeki beyunithi yempendulo bayakukhumbuza: ubuchwepheshe obujwayelekile bebhodi lomama le-DC iyisistimu yokulawula isivinini ye-AC enezimoto eziningi, kusetshenziswa idivayisi ehlukile yokulungisa/yempendulo ukuze inikeze uhlelo amandla athile e-DC, isiguquli esilawula isivinini esixhunywe ngokuqondile ebhodini lomama le-DC. Lapho uhlelo lusebenza esimweni sikagesi, i-inverter ithola ugesi ebhodini le-motherboard; Uma uhlelo lusebenza esimweni sokukhiqiza amandla, amandla abuyiselwa ngqo kugridi yamandla ngebhodi lomama kanye nedivayisi yempendulo ukuze kuzuzwe ukonga amandla, kuthuthukiswe ukuthembeka kokusebenza kwemishini, ukunciphisa ukugcinwa kwemishini nendawo yokusebenza.
I. Umsuka wesistimu yebhasi ye-DC evamile
Kuma-motor aqala njalo, ukubhuleka, noma ukusebenza kwama-quadrant amane, indlela yokubhekana nenqubo yokubhuleka ayithinti kuphela impendulo eguquguqukayo yesistimu, kodwa futhi nendaba yokusebenza kahle kwezomnotho. Ngakho-ke, i-feed braking sekuyiyona nto okugxilwe kuyo engxoxweni, kodwa ingenziwa kanjani indlela elula yokufinyelela ukubhuleka impendulo lapho iziguquli ezivamile eziningi zingakakwazi ukuzuza amandla avuselelekayo ngesiguquli sefrikhwensi esisodwa?
Ukuze kuxazululwe izinkinga ezingenhla, uhlelo lwempendulo yamandla avuselelekayo lwethulwa lapha ngendlela yolayini webhasi we-DC okwabelwana ngawo, olungasebenzisa ngokugcwele amandla avuselelekayo akhiqizwa i-braking, ngaleyo ndlela yonga ugesi nokucubungula ugesi ovuselelekayo.
Ukwakhiwa kwesistimu yebhasi ye-DC evamile
Isistimu yokulawula ibhasi ye-DC evamile ngokuvamile iqukethe iyunithi yokulungiswa / impendulo, ibhasi le-DC yomphakathi, iyunithi ye-inverter, njll. Iyunithi yempendulo ingahlukaniswa ibe impendulo yamandla ngokusebenzisa isiguquli esizihlanganisayo kanye nempendulo yamandla ngaphandle kwe-transformer ehlangene ngezindlela ezimbili. Impendulo yamandla hhayi nge-self-coupled transformer empeleni ukugcina isistimu esimweni sempendulo, ngesikhathi senqubo yokulungiswa okufanele izuzwe ngokunciphisa ngokuqhubekayo i-voltage yesifunda esimaphakathi ngokulawulwa kwesigaba.
Okwesithathu, umgomo wohlelo olujwayelekile lwamabhasi e-DC
Siyazi ukuthi i-asynchronous motor multi-transmission ngomqondo ojwayelekile ihlanganisa ibhuloho elilungisa kabusha, isekethe yokuhlinzeka ngamabhasi e-DC, ama-inverter amaningana, lapho amandla adingwa yinjini ephuma kumodi ye-DC ngesiguquli se-PWM. Kumodi yokudlulisa okuningi, amandla azwakalayo uma kubhuleka abuyiselwa kusekethe ye-DC. Ngomjikelezo we-DC, le ngxenye yamandla empendulo ingadliwa kwamanye amamotho kagesi esimweni sikagesi, lapho izidingo zokubhuleka ziphezulu kakhulu, zidinga kuphela ukuba sebhasini elihlanganyelwe kanye neyunithi yokubhuleka okwabelwana ngayo.
Izintambo eziboniswe kuMfanekiso 1 ziyindlela evamile yokubhuleka yebhodi lomama le-DC, i-M1 isesimweni sikagesi, i-M2 ivamise ukuba sesimweni sokuphehla ugesi, futhi izigaba ezintathu zikagesi we-AC 380V zitholwa ku-VF1.
Umfanekiso 1 Indlela yokubhuleka impendulo yolayini webhasi we-DC okwabelwana ngawo
Isiguquli sefrikhwensi i-VF1, i-VF2 kumotho kagesi i-M1 endaweni kagesi, ixhunywe ebhasini le-VF1 ngebhasi le-DC okwabelwana ngalo. Ngale ndlela, i-VF2 isetshenziswa kuphela njenge-inverter, futhi uma i-M2 isesimweni sikagesi, amandla adingekayo atholakala ngegridi ye-AC ngokusebenzisa ibhuloho lokulungisa le-VF1; Uma i-M2 isesimweni sokukhiqiza amandla, amandla empendulo asetshenziswa isimo sikagesi se-M2 ngomugqa webhasi we-DC.
Izinzuzo zesistimu yebhasi ye-DC evamile
I-1, uhlelo lwebhasi olujwayelekile lwe-DC luyisixazululo esingcono kakhulu sokuxazulula ubuchwepheshe bokudluliswa kwezimoto eziningi, ukuxazulule kahle ukungqubuzana phakathi kwesimo sikagesi kanye nesimo sokukhiqiza amandla phakathi kwamamotho amaningi. Kuhlelo olufanayo, amadivaysi ahlukene angasebenza ezifundeni ezihlukene ngesikhathi esisodwa, iyunithi yempendulo yokulungisa iqinisekisa ukuhlinzekwa okuzinzile kwamandla kagesi omphakathi webhasi le-DC, futhi ibuyisela amandla engeziwe kugridi, iqaphela ukusetshenziswa okunengqondo kwamandla avuselelekayo.
2, isakhiwo semishini yebhasi ye-DC evamile sihlangene, umsebenzi ozinzile. Ohlelweni lwe-multi-motor drive, inani elikhulu lezinto ezisetshenziswayo eziseceleni ezinjengamayunithi amabhuleki, izinto ezivimbela amabhuleki nokunye kuyagcinwa, ukonga indawo yemishini nokugcinwa kwemishini, kunciphisa amaphuzu okuhluleka kwemishini, kanye nokwenza ngcono izinga lokulawula lonke lemishini.
3, ukusetshenziswa kobuchwepheshe obujwayelekile bebhasi le-DC ezenzakalweni ezishayelwa izimoto eziningi njengethrekhi ye-roller iyindlela yokuthuthukiswa yokulungiswa kwesivinini se-roller, ingafinyelela ukusebenza okuphezulu okuguquguqukayo nokumile, ukunemba kokulungiswa kwesivinini ngenkathi kusetshenziswa ngokunengqondo futhi igaya kabusha isistimu yamandla avuselelekayo.
Okwesihlanu, amaphuzu ambalwa edizayini yesistimu yebhasi ye-DC evamile
I-1, i-inverter idinga ukwabelana ngedivayisi yokulungisa, le divayisi yokulungisa iyidivayisi ekhethekile yomugqa webhasi we-DC okwabelwana ngawo;
2, inverter zama ukufaka ndawonye, gwema izintambo ezikude, okungcono ekamelweni elifanayo likagesi;
I-3, i-inverter ngayinye kufanele ibe yidivayisi yokuvikela ehlukaniswe yodwa;
4, ayikwazi ukusebenzisa isiguquli esijwayelekile sokusebenzisa ulayini webhasi we-DC womphakathi, ngaphandle kwalokho kuzoba nobungozi bokushaya umoya;
Amandla omthamo we-motor M1 ~ M4 angase angafani, kodwa kufanele kubhekwe ukuthi impendulo yamandla ingasetshenziswa yini uma isikhathi sokuphumula.
6, inani elijwayelekile leziteshi zokusebenza kumayunithi angu-4 ~ 12 (amandla emoto angahluka) isethi yebhasi lomphakathi le-DC lihle;
I-7, i-inverter ingashayela unomphela uzibuthe i-synchronous motor, ixazulule inkinga yomthelela wokuqalisa;