TfpMkhoahfc TrUbngBfihgc QuyNhdn • So 2, Tip VInam 2012 KET HQfP THUAT TOAN UOC Ll/ONG T C B Q B A N G HE T H N G MRAS VA KY THUAT DIEU KHIfiN M d TRONG DIEU KHIEN Tir THONG VA MOMEN D Q N G CO KHONG B N G B O TRUONGMINHTAN" l.DATVANDife Trong nhiing nam gSn day, dong co khong dong bp (KDB) dupe dung rpng rai cac tniyen dpng dieu chinh toe do, nhieu nghien cuu da de cap den giai phap diSu khien dgng co KDB, di^u khiIn theo quy luat U/f bang hing so [2], diSu khien dinh hucmg tir tntong [1,2,6,7], dilu khiSn true ti6p momen DTC [1,3,4,5] Phucmg phap DTC co nhung uru diem nhat dinh nhu khong can toi bp dieu chinh dong dien va bo dieu bien dp rpng xtmg PWM, khong phai su dimg den cac khau tinh chuyen tga do, it phu thuge tham so ciia may dien vay anh huong cua Stic dien dong khong hinh sin va trgng thai bao hoa cua dpng co se giam Su dong gop ciia nghien cuu trpng bai bao dupe phat trien bang su ket hop giua ky thuat nhan dang dimg he thong thieh nghi theo m6 hinh mau (MRAS) va ky thuat diSu khiSn mcr tren co so he thong di ju khiSn true tiSp momen Thuat toan Men quan ita viae lupng toe dp va tit thong Thuc hien he th6ng di8u khijn voi thuat toan da dupe chiing minh bjng mo phong nhcr cong cu Matlab/Simulink MO HINH TOAN DQNG CO KHONG DONG BO Tren he true co dinh ap, mo hinh toan cua dpng co KDB dupe mo ta nhu , di, „- i , rff, — L„ — = -R •, —s.—^-^ + a, dt L, L, Trong do: L,L, -L\ -1 I, 01 ' ' " f'"" '"''•"' " I-"'" ""'^ ' '''' " ^" '^"^ TRUONG MINH TAN II,,:,- vecto di?n ap (V), dong dien (A) stator; ;, - vecto dong di$n rotor; R,, R, - dien trd (Q); L,, L, - di^n ctai (heiuy) day quan eugn day pha stator va rotor; Lm - ho e t o (henry) giua cac eugn day NGUYEN LY CUA DTC DTC la phuong phip dieu khien vectp dOng ca xoay chieu, tap xung kieh thieh true tiep cac van bien tan nguon ap tren co sd sai l?ch tir thong va sai lech momen ciia dgng co ma khong sir dgng den cac khau chuyen tga dg va bp dieu chinh vong nhu phuong phap tua tir truimg quay rotor Tren he true co dinh ap, tii thong stator dupe tinh tir cong thirc al Ujlwt.Mll UilwT.MH Gan dung ^ " ^ + 1"^^' (3) U,