Điều khiển động cơ xoay chiều ba pha có nhiều tham số bất định sử dụng bộ ước lượng tốc độ

Tap cbi Tin hpc vA Dieu kbien boc, T.29, S.4 (2013), 313-32^

/ c DIEU KHIEN DONG Cd XOAY CHIEU BA PHA CO NHIEU THAM SO BAT

DINH suf DUNG BO l/CfC Ll/ONG TOC Dp

LE HUNG LINH^ PHAM THUONG CAT^, PHAM MINH TUAN^

^ Tnxdng Dai hoc Cdng ng le Thdng tin vd Truydn thdng, Dai hoc Thdi Nguyen

^ Vi$n Cdng nghe Thd'ig tin, Vien Hdn ldm Khoa hoc & Cdng nghe Viet Nam

^ Vien Cdng nghe vu tru, Vien Hdn ldm Khoa hoe & Cong nghe Viet Nam

Tom tat. Bai bao khao sat va dg xuat he th&ng dilu khign dgng co xoay chieu ba pha ph6i hop

phUdng phap Udc lUdng toe dp tU thich nghi va thuat toan dilu khien sii dung mang nc(ron d§ kh&c

phyc tinh bat dinh cua nhilu tham s6 trong mo hinh dong luc cCta dong cd nhU dien txb ciia rotor,

ciing nhu his s5 ma sat va tai thay d6i khi he thQng boat dong. Mot so ket qua mo phong tren

Matlab-Simuhnk duoc thuc hien dg minh chiJng cho phUOng phap Udc Iupng va dilu khign tflc dp de

xuat.

Tif khoa. DOng ca cam iJng, udc lUdng t6c do, dilu khign dong cd, mang ndron.

Abstract. This paper investigates and proposes a three-phase AC motor control system combining

an adaptive speed estimation method and control algorithms using neural networks to deal with

uncertain parameters in dynamic models of the motor such as the rotor's resistance, as well as the

friction coefficient and load changes when the system operates. Some simulation results on Matlab￾Simulink are provided to show the efficiency of the proposed speed estimation and speed control

method.

Key words. Induction motor, speed estimation, motor control, neural network.

1. DAT VAN DE

Dieu khien t6c do dong cd xoay chieu con nhieu van de cSn giai quygt vi mo hinh dpng cd

phan phi tuy^n co nhilu dai lUdng b^t dinh nhu dien Jrd cua rotor, tic thong, he so ma sat va

tai thay doi. Dilu khien dgng cd xoay chilu da la chii dl cua rat nhilu nghien ciJu trong may

chuc n5m gan day [1, 2, 3, 9]. Mot hudng dugc quan tam nhilu la tim cac phudng phap dilu

khien mdi khong sir dung bp cam biln t6c do nhU: sijr dung bp lpc Kalman, lpc phi tuyin hay

bp quan sat theo che dp trUgt [8. 9] dl Udc lUdng t6c do dong cd. Cac phudng phap dilu khien

n&,y lam giam gia thanh san phdm, nhung hieu qua dilu khiln phu thupc vao thuat toan udc

lugng va dg chinh xac ciia mo hinh dpng cd. Do he dgng lUc cua dgng cd xoay chieu co nhilu

d^u lugng bat dinh nen viec dilu khiln dpng cd theo phUdng phap truyin thong khong dam

bao chat Iu<3ng khi co tai thay d5i ldn. IVong trudng hop nay, cac phUdng phap dilu khien tu

thfch nghi [4, 5, 6, 7], phuong phap nhan dang on-line va dilu khiln co sU ho tn) cua mang

nOron thudng dugc su" dyng.