Le Thu Thuy Tgp chf KHOA HQC & CONG NGHE lI2(l2)/2:45-
XAY DlTNG MO H I N H TRANG THAI GIAN DOAN CUA DQNG CO KDB-RLS THICH HOP V 6 l DIEU KHIEN THOU GIAN THlTC
Lg Thu Thuy Trudng Dgi hpc Ky ihugl Cong nghiep - DH Thai Nguyen TOM TAT
Bdi bdo nay trinh bay Xay dyng m5 hinh trgng thdi gidn dogn cua dOng co KDB-RLS thich hgp vdi dieu khiSn thdi gian thyc Idm tiSn d6 dl thiet ke dieu khien s6 cho he truyen dpng dien dpng co xoay chieu ba pha KDB-RLS. Mo hinh trang thdi gidn doan (TTGD) Id xuat phdt diem khi thiet ke he thong dieu khien (DK) thdi gian thyc vk c6 y nghTa quyet dinh tdi chat lupng ciia he thong DK s6 (Digital Control) cua dpng co KDB Rotor l6ng s6c (KDB-RLS).
Tu' khda: dgng ca KDB-RLS; thai gian thuc.
DAT VAN DE
Ddng CO khdng ddng bd Rotor long sdc (KDB-RLS) cd ket cdu don gidn, de che tgo, van hdnh an todn nhung van de dieu khien lgi gap rat nhieu khd khan do dgng co KDB-RLS Id mdt ddi tugng phi tuyen phirc tap. Trong nhiJng nam gan ddy, dien tir cdng sudt vd ky thudt vi xu ly da cd budc phdt trien rat manh me, do dd nd cho phep thyc hien phuong phdp dieu khien sd vdi khdi lugng tinh toan Idn, vd do do bg dieu khien ddng co xoay
;hieu da dan thay the bd dieu khien dgng co
•not chieu trong phan Idn nhung ung dung
;6ng nghiep. Md hinh trang thai gidn dogn TTGD) la xuat phdt diem khi thiet ke he h6ng digu khifin (DK) thdi gian thyc va cd y ighTa quyet djnh tdi chat lugng cua he thdng DK so (Digital Control) cua dgng co KDB lotor long sdc (KDB-RLS).
<0l DUNG NGHIEN CU'U
Jai viet ndy gdp phan hodn thien viec xay dyng 'd danh gid md hinh trgng thdi gidn doan cua fdng ca KDB-RLS, Id co sd cho viec thik ke
ieu khiln so dgng ca KDB-RLS.
iay dyng md hinh trang thdi gian doan ciia ong CO KDB-RLS vd ldm tien de de thiet ke ieu khien sd cho he truyen dgng dien ddng
^io xoay chigu ba pha KDB-RLS.
PHUONG PHAP NGHIEN CUU Md hinh lien tuc dong ca khong dong bo Rotor long sdc tren he toa dp co dinh ap va he toa do tira theo tir thdng Rotor dq Xdy dung vector khdng gian - Hi toa do co dinh ap
Ddng CO khdng ddng bg cd cau tao gdm hai phdn chinh: Phdn cd dinh stator vd phdn quay rotor Tren stator ngudi ta dat cdc cuon day u, v, w lech nhau mgt gdc 120" Rotor cd hai Ioai: Long sdc vd day quan.
Ddng CO xoay chieu ba pha dii Id dgng ca ddng bg hay khdng ddng bo deu cd ba cugn day stator vdi ddng dien ba pha, bd tri khdng gian tdng quat nhu trong hinh 1.
Tel- 0988.109.808. Email- lellmlhuy@lnut edu v,
Hinh 1, Sa do cugn ddy vd ddng stator cua ddng caxoay chieu bapha
Li Thu Thuy Tap chl KHOA HOC & CONG NGHE 12(l2)/2:45-41 Vise xay dirng vector i, (t) dirge mo ta trong
hinh 2.
Ta e6 tli6 xay dyng veetor khong gian sau:
(1,1) Ut)= ^|;„(0+'„('y"''+',,('V"
Hinh 2. 7Vi/er /ap vector khdng gian tit cdc dai lugng ba pha He toa dp quay dq
Bay gid ta quay trd lgi vdi vector ddng stator ma ta da xet tren hinh 2, trong dd he tga dp stator (hoac he tga do aP) tuong irng vdi he xy trong hinh 3 Gia sir ta quan sdt mdt dgng CO xoay chieu ba pha dang quay vdi tdc dp gdc (ti = d ^ /dt, trong dd ° Id gdc tao bdi true rotor va true chudn (da quy udc Id true di qua tam cuon ddy pha u).
Cu?
/
V
X
* C t l p i i day phnW
/ / y ^ !t
Hinh 3. Bieu dien vector khdng gian Iren he tga do lu thdng rolor,he tga do dq Toan bd qua trinh cdc dien gidi d tren dugc tdng ket lgi mdt each day dii d hinh 4.
Hinh 4. Thu ihgp gid trf ihifc cda vector ddng stator tren h? tga dg tie thong rotor Md hinh lien tuc cua dpng car khong dong bp rotor long soc trin h^ tga dg dq
Hinh 5. Md hinh hen luc cua ddng ca KDB-RLS tren he toa do dq
Mo hinh trang thai gian doan thich hgp vdi dieu khien thirc
Mo hinh trang thdi tren mien t/i&i gian Mdt he thdng lien tuc cd the dugc md td t6ng qudt nhu sau:
m = f{x(tlu{t)lxeR";uGR'";x„=x{t,)
y{l) = h{x(l),u(t)lyeR'' . Mti hinh Irang thdi gidn doan
Ma trdn he thdng va ma tran dau vao ciia mo hinh gidn dogn tuang duong:
//(*)= j .
• I » , !!,(»)-(2.2)
Le Thu Thdy Tgp chi KHOA HQC & CONG N G H S 112(12)/2:45-48 Mo hinh trang thdi gidn doan ciia dpng
Cff khdng dong bp Rotor Idng sdc trin h^
tga dp ap
Khdo sdt dac diem on dinh cua mo hinh gidn dogn tim du-gc nhd gidn dogn hoa md hinh lien tuc dpng cff khong dong bp Rotor long sdc tren he tga dp dq
Phuong trinh (2.5) chi'nh Id phucmg trinh dgc trung phy thugc vdo T. Vd dnh hudng ciia tham so T den md hinh cd the dugc khdo sdt thdng qua phuang trinh:
1- Hinh 6. Cdu true md hinh trgng thdi gidn dogn
ciia DC KDB tren h? tga dg stator.
Piiirffng phdp gidn dogn hda true tiep mo itinh trgng thdi liin t^c cua dpng ca khong dong bg tren he tga dp tua tk thdng rotor dq
-ijk)-{a), -o})Tifi,ik)+\ 1
Tir h? phuang trinh tren ta xdy dyng dugc md hinh trang thdi gidn dogn cua dgng ca KDB- RLS nhu hinh 7.
0
(2.5) Su" dyng phan mem Matlab ta se thu dugc dudng quy dao nghi?m so khi T thay doi cd dang nhu hinh f
Hinh 7. Md hinh trang thdi gidn doan KDB-RLS Iren he tga do dg Phucmg phdp tim md hinh gidn dogn tren he dq bdng cdch chuyin hi tga dp cho mo hinh gidn dogn tren he ap
H' H(-
vdi L- "J (2.4) Den day, ta da thu thgp dugc md hinh trgng gidn doan cua dpng co dong bg ba pha rotor long sdc tr8n h | tga dp dq theo hai phuang phdp.
Hinh 8. Vf tri diem cue (a) vd ddp ung budc nhay cda he thdng (b) khi T - 500 ps KET QUA NGHIEN CU"U
Md hinh gidn doan tren hp tga do dq thu dugc bdng each chuyen he tga dp cho md hinh gidn doan ctp. Vdi bien phdp dd ta cd the trdnh dugc cdc gid tri rieng phuc ciia ma trdn he thong ciing nhu sy mat dn dinh cd the xay ra sau khi gidn dogn hda. Ket qud thu dugc se la 47
Ld Thu Thiiy Tap chi KHOA HQC & C 6 N G N G H $ 112(12)/2: 45 - 48 mgt md hinh trang thdi gian doan cd phgm vi
on djnh Idn han so vdi md hinh ta thyc hipn gian dogn hda tir md hinh lien tyc, phyc v(i thiet kc khau DC vd khau QS, chdt lugng hp thong cung tot hon nhu da khdo sat d tren.
KET LUAN
Bai bdo mdi dirng lai d vice khdo sat tinh on dinh ciia md hinh phu thugc vao cdc tham so ma chua thiet ke bp dieu khien sd cho dgng CO. Tren ca sd dp dn djnh dd va yeu cdu chat lugng cy the cua he thdng, ta cd the thiet kc bg dieu khien sd cho vi xir ly vdi ddi tugng la md hinh dgng co vira xdy dyng, cdc khdi dieu chinh ddng, dieu chinh tir thdng, bg dieu chinh tdc dp... vd khdo sdt.
TAI LI$U THAM KHAO [1]. Nguyen Phiing Quang, Joerg-andreas Dittrich (2004), Truyen dgng dien thdng minh. Nxb Khoa hpc & Ky Ihugl.
[2]. Nguyin Phiing Quan§ (2006). Matlab &
Simulink ddnh cho ky .iu dieu khien tyr dpng. Nxb Khoa hgc & KJ thugt.
[3]. Nguyen Phiing Quang (1996), Dieu khien tu dgng truyen dgng di^n xoay chieu ba pha. Nxb Gidod^c.
[4]. Qudch Ddo Son (2011). ''Khdo sdt ddc diim Sn dinh cua md hinh trang thdi gidn doan cjia dgng ca khdng ddng bg rotor Idng sdc". Lugn van thgc si, Trudng Dgi hgc KJ thudt cdng nghi?p thdi nguyen.
[5]. Nguyen Phiing Quang: Giao trinh dieu khien so (Digital control Systems)- Dgi hgc Bdch Khoa HdNpi.
SUMMARY
INTERRUPTION STATUS MODEL OF ASYNCHRONOUS MOTOR - ROTOR CAGE SUITABLE FOR REAL-TIME CONTROL
L e T h u Thuy' College of Technology - 7 \ ( This pape presents the construction of interruption status model of the ihree phase squirrel cage induction motor (KDB-RLS) suitable for real time control system as the premise to design controls for electric transmission of three phase squirrel cage induction motor (KDB-RLS). Interruption status models is starting point when designing real time control system and meaningful decisions to the quality of the digital control system of three phase squirrel cage induction motor.
Key words; three phase squirrel cage induction motor, real time.
Plid„l,imkl,oalioc: TS. Ngtiyh Oum Nhu - Trudng Bai hoc Ky thudt Cong nghiep - DH Thdi Nguyen
Tel: 0988.109 SOS. Emad lelhullmy@imil edu v.