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8/3/2019 Gii php iu khin nng

1/14

Gii php iu khin nng h, truyn ng h thng cntrc thp dng bin tn Hyundai N700 Series v PLC S7-300 (Phn I)

Gii thiu chung.

Cn trc thp nng h v dch chuyn, c cu quay l mt loi thit b c c tnh ti nng n,hot ng ihi chnh xc vi an ton cao.

Trc y ngi ta thng dng ng c in khng ng b rto dy qun cho bi ton thayi tc da trn phng php thay i cc cp in tr ph rto. Do , bi ton ny khngc gii quyt trit v c tnh iu khin vn l theo cp v mt khc v s dng ng crto dy cun nn thit b iu khin cng knh, gi thnh cao do ng c kh ch to, chi phbo dng ln do s dng c gp-chi than,..

Ngy nay vi s pht trin vt bc ca k thut in t cho php ch to ra cc b bin tnbn dn iu khin ng c khng ng b rto lng sc vi rt nhiu u vit, n dn dnthay th cc phng thc c in trn.

Vi s tnh ton v la chn hp l, Chng ti ng dng rt thnh cng bin tn Hyun dai vobi ton iu khin cu trc ni chung v cn trc thp ni ring

c tnh k thut ca bin tn Hyundai N700V Series

Hyundai N700V Series l b bin tn AC. Chng bin ng c AC tr thnh b truyn ng c

th thay i c tc vi chnh xc cao. Cc dng bin tn ny c thit k s dngtrn ton cu. Chng ph hp vi tt c cc ngun in p cung cp t 230 V ti 690 V v ckim nghim trn ton th gii.

Hyundai N700V Series l mt h thng nn tng. Chng c chia thnh nhng m-un khcnhau ph hp vi tng loi ng dng v c th s dng c trong mi lnh vc cng nghip.Chng c b iu khin vng h ti u cho mi nhu cu, v c b iu khin vc-t vng kncho kh nng p ng ti ng tt nht.

Hyundai N700V Series c thit k mt cch hon ton thng nht: Chng c b vn hnhiu khin ging nhau, chng c th c kt hp li vi nhau thnh mt khi theo yu cu, cc

phin bn iu khin khc nhau ca mi phn t l nh nhau v c thit k ng nht (c khnnglp ln). Chng cho cc gii php ti u c ch iu khin n l hoc ch iukhin tp trung.

Cc c tnh chnh nh:

Vn hnh mnh m vi ch iu khin Vc-t tin tin cho mmen khi ng ln,bng 200% nh mc hoc ln hn,
http://www.bientan.com.vn/pdf/Tai-lieu-bien-tan/Tai-lieu-bien-tan/Giai-phap-dieu-khien-nang-ha-truyen-dong-he-thong-can-truc-thap-dung-bien-tan-Hyundai-N700-Series-va-PLC-S7-300-Phan-I.pdfhttp://www.bientan.com.vn/Tai-lieu-bien-tan/Tai-lieu-bien-tan/Giai-phap-dieu-khien-nang-ha-truyen-dong-he-thong-can-truc-thap-dung-bien-tan-Hyundai-N700-Series-va-PLC-S7-300-Phan-I/In.htmlhttp://www.bientan.com.vn/component/option,com_mailto/link,eb81256833b2d3772015e520c48d21d5024e7fc0/tmpl,component/http://www.bientan.com.vn/pdf/Tai-lieu-bien-tan/Tai-lieu-bien-tan/Giai-phap-dieu-khien-nang-ha-truyen-dong-he-thong-can-truc-thap-dung-bien-tan-Hyundai-N700-Series-va-PLC-S7-300-Phan-I.pdfhttp://www.bientan.com.vn/Tai-lieu-bien-tan/Tai-lieu-bien-tan/Giai-phap-dieu-khien-nang-ha-truyen-dong-he-thong-can-truc-thap-dung-bien-tan-Hyundai-N700-Series-va-PLC-S7-300-Phan-I/In.htmlhttp://www.bientan.com.vn/component/option,com_mailto/link,eb81256833b2d3772015e520c48d21d5024e7fc0/tmpl,component/http://www.bientan.com.vn/pdf/Tai-lieu-bien-tan/Tai-lieu-bien-tan/Giai-phap-dieu-khien-nang-ha-truyen-dong-he-thong-can-truc-thap-dung-bien-tan-Hyundai-N700-Series-va-PLC-S7-300-Phan-I.pdfhttp://www.bientan.com.vn/Tai-lieu-bien-tan/Tai-lieu-bien-tan/Giai-phap-dieu-khien-nang-ha-truyen-dong-he-thong-can-truc-thap-dung-bien-tan-Hyundai-N700-Series-va-PLC-S7-300-Phan-I/In.htmlhttp://www.bientan.com.vn/component/option,com_mailto/link,eb81256833b2d3772015e520c48d21d5024e7fc0/tmpl,component/


2/14

Ch Vc-t trit tiu s bin ng vng quay ti tc thp, nng cao s n nh v chnh xc ca qu trnh lm vic,

iu chnh v cp tc ng c trong di tn s t 0 n 600 Hz, Ph hp vi tng loi ng c trong di cng sut t 2.2 n 6000 kW, in p cp: 3 AC 380 V ti 480 V, 500 V ti 600 V, 660 V ti 690 V

Ch lm vic c 4 gc phn t. Kh nng chu qu ti cao: 200% trong vng 3s. C mch hm ti sinh hm dng ng c, vi la chn theo phng php truyn thng

l hm ng nng tiu tn nng lng trn in tr nhit cng sut Kh nng truyn thng cao cp thng qua USS protocol (RS485 tch hp sn),

PROFIBUS DP, CAN, SIMOLINK Card cho php cu hnh t my tnh hay nhng m-un ngoi s dng Bus trng, nn c kh nng gim st v iu khin t my tnh hocPLC,

y cc chc nng bo v nh: bo v qu ti, qu dng, bo v qu ti in tr hmng nng, qu p, st p, mt pha, nhit thit b qu cao hoc qu thp, bo v nhitng c, li CPU, li IGBT, pht hin chm mt u ra,

y cc chng ch, chng nhn nh: IEC, EN, UL, CSA.

Hyundai N700V Series iu khin Vc-t c s dng hoc khng s dng cm bin tc (encoder) nn ph hp vi nhiu loi ti khc nhau, p ng c cc ti i hi mmen khing ln, iu kin lm vic khc nghit, ng ct lin lc, tc n nh, dng chnh xc nhcu trc, cn trc, gu ngom v cc thit b nng h trong cng nghip,


3/14

Hnh 1.1 S iu khin cho thit b nng h

B lp trnh PLC

S dng b lp trnh PLC tc x l cao, chnh xc trong iu khin, an ton v tin cy trongqu trnh lm vic. PLC c lp trnh ng vi yu cu cng ngh v s thay i cng nghv phng n iu khin cng rt d dng i vi ng k thut.

Thit b o lng, bo v

Loadcell: B cn tI trng l mt thit b quan trng trong h thng cn trc thp, vi la

chn hp l, chnh xc, thit b ny gip h thng bo v an ton trong trong qu trnhiu khin, thun tin cho ngi lI cu, vi nhiu mc bo ti trng, v ngt qu tikhc nhau.

Hn ch gc nng cn: cn trc hot ng an ton, chnh xc cao v hn ch qutrnh bo dng (Phng n s dng cc cng tc hnh trnh, cc cam c s dngtrc y) Chng tI s dng b sensor chuyn dng.

Hn ch gc quay:S dng b hnh trnh chuyn dng, vi nhiu cp bo (bo v qutrnh gim tc, qu trnh dng an ton,)


4/14

Hn ch chiu cao nng:S dng b hnh trnh chuyn dng, vi nhiu cp bo (bo vqu trnh gim tc, qu trnh dng an ton,)

B o tc gi:Thay i nhiu cp(tng ng vi chiu cao ca cn trc), thun tintrong qu trnh ci t.

Chng st lan truyn.

Bo cao,

c im v nguyn l lm vic ca h thng.

S khi cng ngh:

c im:

Vi yu cu kht khe ca h thng cu trc, cn trc i hi cht lng lm vic v n nhcao Chng ti s dng gii php hin i ha v nng cao kh nng p ng v tin cy chocc h thng cu trc, cn trc ca bn bng vic s dng bin tn Hyundai N700V Series

(tham s iu khin ng m phanh ti u cho iu khin cu trc) iu khin vng kn vi ccthng s k thut chnh sau:

Ch iu khin: iu khin Vc-t vng kn c s dng Encoder phn hi tc choc c cu nng h.

Cu hnh iu khin: y l cu hnh iu khin ph bin ang c s dng thng dng cc nc tin tin trn th gii hin nay cho ng dng cu trc.

Kt hp linh hot vi b lp trnh PLC SIEMEN tng tin cy trong qu trnh iukhin v hot ng ca thit b, gim khng gian lp t.

Nguyn l c bn:

C cu quay cu, y l mt loi ti nng c sc ln nn yu cu mmen khi ng ln. ngc ny iu khin bi b bin tn 22KW c tnh ton theo mmen khi ng, gip di chuynnh nhng, m du,kt hpphanh c khi v b hm iu khin ca bin tn nng cao bn ktcu c kh.

C cu nng h vt v nng h cn , hai c cu ny hot ng tng i ging nhau c c tnhtI ging nhau. Ti nng h l mt loi ti th nng c yu cu mmen khi ng ln. Cc mcnng-h s dng cc b nghch lu vi nhng tham s chuyn bit cho ng dng nng h.

Tt c cc hnh trnh nng h, ng m gu, xoay cu u c gn cc cng tc gii hn hnhtrnh 2 v tr t ng gim tc v t ng dng dch chuyn khi n v tr gii hn, v ccsensor chyun dng.

Trong giai on hm dng ng c, nh mch hm ti sinh vi thut ton c bit, nnglng in ti sinh trn in tr nng lng ca ti c tiu tn, gip cho qu trnh dngng c theo mun.


5/14

Bin Hyundai N700V Series vi ch iu khin vc-t c mch vng phn hi tc encoder gip cho iu khin v dng ng c chnh xc v momen ln khi hot ng tc thp.

Ngoi ra, vi chc nng iu khin phanh c kh gn ngoi chuyn dng c sn trn bin tn s

phi hp iu khin mt cch nhp nhng v mm mi gipchng c s tri ti u chutrnh khi ng v cui chu trnh hm.

Bin tn iu khin 5 cp tc ng nh cc Joystick. Ngi vn hnh c th iu khin ringrcc c cu truyn ng.

Tt c cc ng c c bo v qu ti, qu dng, qu p, mt pha, lch pha, bo v nhit ngc, nh cc ch bo v x l tc thi ca bin tn.

C th quan st c dng in, in p, cng sut ti tiu th, tc quy i, chiu quay cang c,chiu cao nng, gc nng, tI trng ca vt, cc m li, bng mn hnh hin th.

Tnh ton cng st cho bin tn

H s Moomen cho bin tn nng h :

T=k.Tn=1,5.359=538(Nm)

La chn bin tn cho c cu nng h vt: 90KW


6/14

Hnh 1.2: c tuyn qu ti cu bin tn N700V Series

Bin tn cho c cu nng h cn:

Cng sut ng c (Pn): 30KW S vng quay ng c(nn): 1465 v/p T s truyn(n1): 104.76 Tc u ra hp gim tc(n2): 14 v/p


7/14

Moomen u ra hp gim tc(Tp): 3700 Nm Moomen u ra ca ng c(Tn) Dng nh mc ca bin tn (IINVERTER) Dng nh mc ca ng c(IMOTOR) H s la chn bin tn cho c cu nng h: k=1,2 n 1,5

Moomen nh mc cho ng c 30KW:

Kim tra Moomen nh mc cho bin tn 30KW:

H s Moomen cho bin tn nng h :

T=k.Tn=1,5.195= 292(Nm)

La chn cho bin tn cho c cu nng h cn: 45KW

Hnh 1.3:c tuyn qu ti cu bin tn KEB


8/14

Bin tn cho c cu quay cn

Vi c cu quay cn, i hi ch hot ng chnh xc, m du, v kh nng chng lc, rungcn. Bin tn Hyundai a ra giI php dng mm trong qu trnh tng v gim tc rt hiuqu trong ng dng cn trc thp.

c tnh tng gim tc ca bin tn c cu quay cn gip hot ng m i:

Hnh 1.4:c tnh tng gim tc ca bin tn c cu quay cn gip hot ng m i:

Cng sut ng c (Pn): 15KW S vng quay ng c(nn): 1460 v/p T s truyn(n1): 82.88 Tc u ra hp gim tc(n2): 18 v/p Moomen u ra hp gim tc(Tp): 8500 Nm Moomen u ra ca ng c(Tn) Dng nh mc ca bin tn (IINVERTER) Dng nh mc ca ng c(IMOTOR) H s la chn bin tn cho c cu nng h, c cu i hi moomen khi ng ln:

k=1,2 n 1,5

1. Hm DC Injection:

o L phng php hm ng nng dng dng in 1 chiu.

o Cch thc thchin l ngt ngun AC cp cho ng c v ng ngun 1 chiu vo cho ng c.

VD: hm ng nng dng dng 1 chiu cho ng c ng b 3 pha.+ u tin ct ngun AC ca ng c.+ Cp in 1 chiu cho 2 pha ca dy qun Stator.+ Dng in 1 chiu i qua dy qun Stator, to ra t trng khng i trong khe kh. Lc ny ng chot ng nh mt my pht in 1 chiu khng c gp, ngn mch u ra.+ Rotor do vn cn qun tnh, nn tip tc quay trong t trng 1 chiu , dn n trong dy qunRotor cm ng mt s v dng in cm ng.


9/14

Dng in cm ng va sinh ra tc dng vi t trng Stator. Kt qu to ra moment hm chng li chiu quay Rotor.

o Phng php ny ch dng dng ng c, moment hm gim dn.

o Thng thng cn ci t dng 1 chiu vthi gian hm.

o Vic iu chnh moment hm c thc hin thng qua vic iu chnh in p DC t vo 2cun dy Stator (dng bin tn).

o ng c, Rotor ngn mch ta khng th thm Rham, nhng Rotor dy qun ta c th thmRham tng moment hm.

o 2 Bus DC ca bin tn c nhiu ng dng:

+ Nu dng hm th cn lp thm 1 b hm (c c in tr hm) v nu ly thng DC Bus ra dnghm th nng lng tr v ln chy, hng DC Bus.+ C th tit kim nng lng tr v li bng cch lp b hm ti sinh Genertive Braker.

o mt s bin tn c tch hp sn 2 u ra 1 chiu (khng phi DC Bus) bn trong c IJBT. Khihm, IGBT iu ch PWM iu chnh cng sut hm (khng phi PWM iu ch dng sin cabin tn).

2. Khi nim Catch on Fly:

o L hnh thc bt theo cng tc ang quay ca ng c.

o V d nh khi ng c mt in hay restart, ng c s khng bt u t tc 0 m bin tn so tn s thc t ca Rotor ang quay v bt u xut pht t tn s .

o u im: khi ng li ng c ang chy s khng b git, khng li.

o Vic ci t c thc hin bng bin tn.

3. FreeWheel Stop:

o Khng tc dng bt c g khi ngt ng c ra khi li in, ng c quay dng t do.

4. Hm ti sinh dng nghch lu ph thuc:

o Phng php : lp thm b nghch lu ph thuc song song vi b chnh lu, nghch lu phthuc hot ng tng t ng c 1 chiu, pht in v li.


10/14

o Khi tc ng c ln hn tc khng ti, ng c s nh l mt my pht a in ngctr li DC Bus, t C tch in, cu hm ti sinh s chuyn in trn DC Bus (khi cng Gate ckch hot) v li in xoay chiu.

o u im: tit kim khi ng c thng xuyn hm.

o Nhc im: Chi ph ban u cao (do thm cu ti sinh);Ch thch hp khi ti thay i tc vchiu chuyn ng thng xuyn.

5. Ni cc DC Bus ca cc bin tn khc nhau.

o u im: d thc hin, gi r, khi ng c ny hm th nng lng tr v s nui ng c khc.

o Nhc im: nu tt c cc ng c ny cng hm th phi b tr thm in tr hm.

o Vi bin tn cng sut khong 0.551.5KW th khng cn cu ch DC Bus.

o Trng hp trong h thng c nhiu ng c hot ng lin tc trn h DC Bus th khi ngunca mt bin tn s l khng . Trong trng hp ny s c thm bin tn kt ni vi dyngun.

6. Hm ng nng qua in tr:


11/14

o Hm ng nng qua in tr: khi ngt ngun AC ca ng c, cht hm IGBT s t ng mtrn DC Bus. IGBT c ni vi in tr hm thch hp (in tr cng sut). Nng lng tng c tr ln DC Bus qua in tr hm v do s khng nh hng ln bin tn.

o u im: n gin.

o Nhc im:+ Tn in (khng tn dng c in tr v).

+ Tn in tr.+ Ch thch hp vi thit b hot ng lin tc, t hm, o chiu.

7. Tnh in tr hm cho bin tn:

o Chn R c cng sut bng cng sut hm.

o Mun ng c chuyn chuyn t tc 2 v 1 trong thi gian t:

J, 2 1 , vi J l moment qun tnh quy v trc ng c.

o Cng sut ng c khi hm:

PM = 1/2 (22 12)1/T .T: thi gian hm.

o Cng sut in tr hm:

o

PR = U.I = U^2/R

o bom an ton khi hm th:

PM = PR R=2T.U^2/J(_2^2-_1^2 )o Nhn xt:

+ R ln s hm lu do I b+ R b dng ln hng t C.+ Do cn chn R ph hp.


12/14

1. Cu hnh s khi bin tn

2. c tnh cng sut

Mi quan h gia tc ng c v moment khai thc: Nu f> fN th moment gim f 70%, qu ti ch din ra trong

khong thi gian ngn khong 60s.


13/14

3. Cc loi u vo thng dngNg vo s (Digital) : Start Stop o chiu quay

Reset Khi ng cc tc cho trc Jog

Ng vo tng t (Analog) : Tc t Cch u ni tc thng qua bin tr hoc in p ngoi Phn hi nhit ng c Phn hi t cc cm bin khi dng PID Phn hi encoder, proximity, sensor,..

4. Cc loi u raNg ra s (Digital) : Output Relay Bo li Bo tc Bo ngun Run Bo ang chy

Ng ra tng t (Analog) : Ci t Chn tn s Xut tn hiu v u, i, M, Kt ni truyn thng: RS485, PPLC,

5. Cc tnh nng m rng PID Biu khin PID c tch hp sn trong bin tn, ta ch cn ci t togn6 s do ta tnh ton vi

mc ch v yu cu t ra. Thut ton ca bin tn s tip nhn thng s v iu chnh.

+ Khu t l P: khuych i sai s, tng cng ca c tnh PID.+ Khu tch phn I: tng chnh xc ca h thng, gim n nh.+ Khu vi phn D: gip n nh h thng, khi KD tng s gip h thng tin nhanh v gi tr ci t. Biu khin c hai tham s P, I dng iu khin cc i tng c qun tnh b nh:iu khin

mc, lu lng, p sut. Biu khin c c P, I, D: dng iu khin cc i tng c qun tnh ln nh: iu khin

nhit .

S khi cu hnh iu khin


14/14

--> Sensor dng phn hi cc tn hiu p sut, nhit ng c, tc ,--> Mc ch l iu khin ng c, n nh p sut.5. Vn truyn thng trong bin tnKt ni cc h thng thu nhn thng tin khc thng qua CPU bin tn qua cc cng RS484, RS422.

Kt ni vi PC bn ngoi, mn hnh iu khin.

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