Speed control of universal motor using scr
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practical to perform speed control of motor using power electronics
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SFEED CONTRCL OF UNIVERSAL MOTGR TJSING S.f.*.
,FEORY
IROCEDLiRE
JM
)EJECTIYES
I Speed cDnliol of rriveFar nolor usiig
Io conkciihe spe.d or ihe urlversalmotoi uslng s c i. and to meesure spee.i.f $oior,
gate lcliase ofSCRand voiiage a.ross load by varr/ n9 variable resishnce.
n.e, 6 .oLo. d1€ ar-ar]e q o lle re.o
^r.d
lq a.e io:.
:'_eh': ..J:le',ed cr.?.r e . rh 6,3 - ihe sa-. -'..(rrc. -.e .)r.:.;- !c opic..c .n
^.( o lC..-c!./.-resencro.s:reG.eo J'VLRS/L O ORS'. ',nese :r .L-,
aiiiceti.n. :iFlian.$ ike mlxer, sevnng n:chines,snatl puhF et.. Vlhen ihe mdcr is ic
be lsed oniy on A.C. slppiyaslmpect.iuilsingonlyo.eS.C.R.is!s6diocanijct i:s
speed. (Th s i. shcvh i. ihe circaii,) S.C.R. .ar coaduci ciy durjig ihe poiii.re hati cy.les oi
A.c. sLipply v/hen lerminal A'posiuvewlh respectio'E'<iJriigpos+ire i,eicycie. Capa.iLor
(C).harges iirroush R1, R2 anC Dlode 01 When vcrage accro+ (c) equals,he fiis .
.Lc!6r!ai. S.a.R. deiomlnes the ansl. oi firing ( e ) at v/hi.h ri w l ccndu.r j-he conduciine
(siarilrs) anlre i:ay be delay--d !y yaidbe reslsiai (82) adjusiment 9.CF e6.ii:1FF.
dling the neSai!€ naii cvc e !i A.C. swply. V. is iefere.ce the.roti.qo snr..iirerl o.i ii a.
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Simulation based minor project on Buck converter( DC to Dc step down Converter)
Speed control of universal motor using scr
- 1. a:o SFEED CONTRCL OF UNIVERSAL MOTGR TJSING S.f.*. ,FEORY IROCEDLiRE JM )EJECTIYES I Speed cDnliol of rriveFar nolor usiig Io conkciihe spe.d or ihe urlversalmotoi uslng s c i. and to meesure spee.i.f $oior, gate lcliase ofSCRand voiiage a.ross load by varr/ n9 variable resishnce. n.e, 6 .oLo. d1€ ar-ar]e q o lle re.o ^r.d lq a.e io:. :'_eh': ..J:le',ed cr.?.r e . rh 6,3 - ihe sa-. -'..(rrc. -.e .)r.:.;- !c opic..c .n ^.( o lC..-c!./.-resencro.s:reG.eo J'VLRS/L O ORS'. ',nese :r .L-, aiiiceti.n. :iFlian.$ ike mlxer, sevnng n:chines,snatl puhF et.. Vlhen ihe mdcr is ic be lsed oniy on A.C. slppiyaslmpect.iuilsingonlyo.eS.C.R.is!s6diocanijct i:s speed. (Th s i. shcvh i. ihe circaii,) S.C.R. .ar coaduci ciy durjig ihe poiii.re hati cy.les oi A.c. sLipply v/hen lerminal A'posiuvewlh respectio'E'<iJriigpos+ire i,eicycie. Capa.iLor (C).harges iirroush R1, R2 anC Dlode 01 When vcrage accro+ (c) equals,he fiis . .Lc!6r!ai. S.a.R. deiomlnes the ansl. oi firing ( e ) at v/hi.h ri w l ccndu.r j-he conduciine (siarilrs) anlre i:ay be delay--d !y yaidbe reslsiai (82) adjusiment 9.CF e6.ii:1FF. dling the neSai!€ naii cvc e !i A.C. swply. V. is iefere.ce the.roti.qo snr..iirerl o.i ii a. e:_:e:_e-:c.:i.errtLyceinev.iBg''r:ic_'l.rr-r..r:.,I5esCr:,1:,:::-Fa..- v/iin ire reieience 'rliiaSe v., ro det€ri:ne vrhen ro fire i,5e S C.RWiren !h€ moior rs zt srand- sill, ic r.s:d!al v.lia!. i5 ind!.ed s. that the SOR ,ie. errty in tne .r.t. crLFin! n.xr]n c..irrehitououihrorjgh the motor,.ausing iiio acceleGte. ?s the moiorpcks uo ihe speed. tire -sliace Inlrced ii +e.naiu.e 5y residualflux incrcases, delaying ihe riri.g .fSCR:he€by 'eiLc -o e,-i er..aar r:ro.- Lnrir ine moto' $oDS acLete,ailg t^ rcavy trao o. . -)!o.-'- Cr.'r :1. - ^:".4 -:..ti.: :re :esi:' : rottEg: -.::^., i...",:f SC e i: -.e q:.: : - :-c -)c,e.So rl-a,'rrea,eo,.'6-:' / .1,.. ce.e opil! r:.er"6c rq,e tc -.d Tle crarg. - :.. :o-crd-- :-: - ...r9-..-: ;.erag6 onai ..:p e- o re ioior rload)and henca varie. fie speei.By vainE variabie reststance LR2r ine sp€€n can !:.irrig* n.f zc?6 rE tqll1pwd. Rsqt{in31!hr5e €r. iarF ucr!55 ih: rrE, i! 3. shown ii Fsur6. Diode (D1) pr€venis the ch,rgtns oi capacitor (.) in reveise pojar dur;.g tl"e negaiiv. i.ali c-rcb oi Arc. srFpiyvott3ge. The dtcle (D2) Frorecis tr€ S.C R. toft negaiv; gate io.athode vo age dlring tirenegaiive hatt cyc e. SD6ed corl.o tcli ig m.d!le. corneci ihe tr4rnirg nro<iule as shosn in Jiswe. Take supFlythrolgh seii€s l.mp Swich ON ihe A C. slpply, Adjusi R2 ara i.le jsi ihe spe.a b:, SIRaECSCCFE licte cq,r. ihevarue ci:essEn.e i2 r€.or0 tjE read:ngs ci laE y. ia!., :eDe:rsrep o.od.rc )5.eEpec: r. ,. l 2 3 1 2 3 5
- 2. NOISn lsNol ---i-l .dorsoqo4s (roloi^l) peot 'u'a's oulsruo$u to p63ds ssor.e.64p Jo€6qp^.teg €iuEs'sad I E1!|V-L NO|1VAUIS8