Ngaba uyafuna ukwazi ngakumbi ngomsebenzi weI-Braking Resistorkwisiguquli samaza?
Ukuba ewe, nceda ujonge olu lwazi lungezantsi.
Kwinkqubo ye-frequency drive eguquguqukayo, i-motor iyathotywa kwaye imiswe ngokunciphisa kancinci kancinci. Ngeli xesha lokunciphisa amaza, isantya se-synchronous se-motor siyancipha, kodwa ngenxa ye-inertia yomatshini, isantya se-motor rotor sihlala singatshintshi. Kuba amandla esekethe ye-DC ayinakunikwa umva kwigridi ngebhulorho yokulungisa, inokuxhomekeka kuphela kwisiguquli samaza (i-frequency converter ithatha inxalenye yamandla nge-capacitor yayo). Nangona ezinye izinto zisebenzisa amandla, i-capacitor isenamava okuqokelela intlawulo yexesha elifutshane, idala "i-boost voltage" eyandisa i-voltage ye-DC. Umbane ogqithisileyo we-DC unokubangela umonakalo kwizinto ezahlukeneyo.
Ngoko ke, xa umthwalo ukwisimo sokunyathela i-generator, amanyathelo ayimfuneko kufuneka athathwe ukusingatha la mandla okuvuselela. I-crane resistor kwisekethe ngokuqhelekileyo idlala indima ye-voltage divider kunye ne-shunt yangoku. Ngemiqondiso, zombini i-AC kunye ne-DC imiqondiso inokudlula kwii-resistors.
Kukho iindlela ezimbini zokujongana namandla okuhlaziya:
1.Usetyenziso lwamandla okuqhobosha ukusetyenziswa kwe-energy Ukunyanzeliswa kwebraking kukongeza i-discharge resistors component kwicala le-DC le-frequency frequency drive ukutshabalalisa amandla ombane ahlaziyiweyo kwi-resistor yamandla yokuqhawuka. Le yindlela yokujongana namandla okuvuselela ngokuthe ngqo, njengoko idla amandla okuhlaziya kwaye iguqulelwe kumandla obushushu ngokusebenzisa isekethe ye-braking echitha amandla. Ngoko ke, ikwabizwa ngokuba "yi-resistance braking", equka iyunithi yokunyathela kunye ne-aisixhasi isiqhoboshi.Iyunithi ye-Braking Umsebenzi weyunithi yokunyathela kukuvula i-eneji yokusetyenziswa kwamandla xa i-DC yesekethe i-voltage Ud idlula umda ochaziweyo, ukwenzela ukuba i-DC yesekethe ikhuphe amandla ngendlela yobushushu ngokusebenzisa i-resistor braking. I-resistor ene-resistor eqhubekayo ibizwa ngokuba yi-resistor esisigxina, kwaye i-resistor ene-resistor eguquguqukayo ibizwa ngokuba yi-potentiometer okanye i-resistor variable okanye i-Rheostat.
Iiyunithi ze-2.Braking zinokwahlulwa zibe ziintlobo ezakhelwe ngaphakathi nangaphandle. Eyangaphambili ifanelekile kumandla aphantsi okuguquguquka kwamaza okuqhuba, kwaye le yokugqibela ifanelekile kumandla aphezulu okuqhuba amaza okuqhuba okanye iimfuno ezikhethekileyo zokuqhokra. Ngokomgaqo, akukho mahluko phakathi kwezi zimbini. Zombini zisetyenziswa "njengeetshintshi" zokudibanisa i-resistors braking, kwaye zenziwe ngee-transistors zamandla, isampula yombane kunye neesekethe zokuthelekisa kunye neesekethe zokuqhuba.
I-resistor ye-Braking isebenza njengesixhobo sokuvuselela amandla emoto ukuba ichithwe ngendlela yamandla obushushu, kwaye ibandakanya iiparamitha ezimbini ezibalulekileyo: ixabiso lokumelana kunye nomthamo wamandla. Iintlobo ezisetyenziswa ngokuqhelekileyo kubunjineli ziquka i-ripple resistors kunye ne-aluminium (Al) i-alloy resistors. Eyangaphambili isebenzisa umgangatho othe nkqo othe nkqo ukunyusa ukutshatyalaliswa kobushushu, ukunciphisa i-parasitic inductance, kwaye isebenzisa ukuxhathisa okuphezulu kunye ne-flame-retardant inorganic coating ukukhusela ngokufanelekileyo ucingo lokuchasa ekugugeni kunye nokwandisa ubomi bayo benkonzo. Ukuxhathisa kwemozulu yale yokugqibela kunye nokumelana nokungcangcazela kubhetele kunezixhasi ezingundoqo ze-ceramic, kwaye isetyenziswa ngokubanzi kwiindawo ezirhabaxa zolawulo lwamashishini ezineemfuno eziphezulu. Zilula ukuzifaka ngokuqinileyo kwaye zinokuxhotyiswa ngeesinki ezongezelelweyo zokushisa (ukunciphisa ubushushu obuveliswa ngexesha lokusebenza kwesixhobo), ukubonelela ngenkangeleko ekhangayo.
