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7j AD-A103 131UNCLASSIFIEDF/ 9/5SELECTION OF ROTOR WINDING IN COLLECTOR-FREEAFS OHELECTRICAL MACHINE--ETC(U)DIV WRIGHT-PATTERSONTECHNOLOGYJUL81 AI SKOROSFESHKIN,K A KHOR-KOVFOREIGNFTD-ID(RS)T-0659-a1EIN000E0000mEE

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IU,,)T1-0659--FTD-ID(ESiY ,-, , ,,"'S LA,-TU0 N.b. rhO "i. i:./ee.En.li .I./FTD-81-C-OO0636SI.oro .Lc-. .Aofo i TokTranslated by:s, ;,- o.S R. . . . . .Vnstitut.ut ':!C,. .160, 1966, 1.-.IsTHIS TRANSLATION IS A RENDIlION OF THE R IcG.NAL FOREIGN TEXT WITHOUT ANY ANALNT'CAL OREDITORIAL COMMENT. STATEiFNTS OR TI'CO(RFsADVOCATEDOR ImPLIEDAPE TH-SE OF THf SOURCEANDDO NOT NECESSARILY REFLECT THE PG,IT;0#OR OPINION OF THE FOREIGN TECHNOLOGY Di.VISION. . .Requester:FT D/T DApp rove d for u, 1c--c c- u;'ieunlimiite d.T-0.,.ZaeiFolite,.:: 2K/2. os,,omimeni S. M. Kirva, Vl.FTD -i)(Rz.7;I:,vo '- ' yS ZnamfeniCountry.K.]De01r obuzova.,sSourcC17 JulY 19&1.,r :PREPAR [. 5Y;TRANSLATION DIVISIONFOREIGN 7 CCHNOLOGNWO.AF!, 01410.r- SDIVISIONDate .17 lu' 10. .-: --i. . .:- .T l .1 --. --*,-

I c)Cj1ia i1TranSlJ tcvationAaA ,a6B1 (3ON GLD-:jhAI'ii CCARILU.*TY yYyX x0XqbxL LALVZjLI/ Lg1) 1,1LUxY, yK, k7AL, 1MMj11n7 nzShch,tY,b"wyba.E, eand afterYa, yaii7iRnP, pafter vc, els,Leinitially,Tsuj:7wN,r nHHk1,ibbM,mFKh,Ch c ;1VvVDdYe, ye; E, ItaiC C0hi .1f1 CkB3, b17AL'L T( PpC crzCL c*:,%.*-b,L.; e elsewhet-re.Vihnwrittc;n as 6 in Russian, transliterate as yLE orRUSSIAN AND "I GLISii TRIC-")x.OI ETRICUTINRussianEngl.ishRussianEnglishRussiansin ostgct charcarcarcarcarccoseccsccscbcscharc cschRussianEnglishrotigcurllogshchthcthsc IEg irc1!s'echcs(LI

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'iU!.CV1'h; :.u [Co l k tor-t reelk('Ct r-'dCvilo',dt l'lSi-.tllitC fir:tcweecsselIt ail V aCIscZadeof the a i r gap inthatI hneis adoptedbe expect ,d, therefore , that;lJ] ":.!:chi 1c Ai,,l il icr j andItL.'o-ieu8:;\,nchrumiina sncand,s(.;c IdeC,chine.IIoolsIr,-int,,;ixitcd.8;1eBut tIetmachins.Itcant. he use of st.abi lizirg reso,,rcus,'withoutthe external chara,cteristics, of the synchronous cascade wil l have aExperimentsteeply di oping nature.confiril:sthis.The existing met!hods aor stabilizing volta,,e by using fcedba.(,].are more suitable for tran.-,formers and ariplifiers of direct current andfixed frequency.frequency,Inthe use of feedbackcontrollablewith controllabletransformers and aplifiersresults insemiconductor collector(UPK)an additional- loid of tbethat x,ith largeof frequency regulation can surpass the rated outputother words,frequency) several times.Inthrough the UPK results ina decreaseinlimits(with basethe presence of fcedh-,ckthe rated loading of tliomachine.This forces us to search for new methods of stabilizinghevoltage.We have suggested a method for inml-roviniexternalthe rigidity of thecharacteri stics of the synchronous cascade of the machineby reducing the effect of the demagnretizincg action of the armaturereaction with the help of a special design of the rotor winding called"zigzag."The essence of this winding design is that each phase of theis,indingdivided into parts that are shifted in space in relation to eachother at a certain angle a (fig. 1).As a result of this connection, a shift is created between t-hcmain flux and the flux of the armature reaction.As a result, thedemagnetizing effect of the armature reaction is diminished.resulting electromotive forcebut insignificantly,The(e.m.f.) of the machine is also reduced,in any case, to a lesser degree than the de-magnetizing effect, of the ar-mature reaction is reduced.Logic predicts that phase divis ion into two equal parts will bethe best.[Illegiblej the following calculated formula:

I'I', ;I--(rntJ '. indill',phasc::,fr tfwcvilltyri:m.,winding%c ofl:.,.at,.O--m.igncticK---of ail-,p -1ei*iintowU - -numboe" of U.ifl(i u. l.oops,K- -coefficient of ,ir gap,K--saturationcoof ficienip--numlibor of polc, pairs,6--size of airgw.Figure I.Analogously, the derived expression for the inductive resistanceplan looks like:of the winding when it is connected on the "zigzag"* i,,l I;,,(2)l.5 ,)":XP, , tllf:-i% j. I !M , I-N'2Cos.)Y-1. M ".On the condition that the number of winding, loops of the "zigzag"WZ 1 I 2 equals the number of loops of the normal winding pweobtainxl, .I1( W ,4 \V',cos r- )' -.(V., sin ,)]" -0.(.(3)2

Io.'.I03Figure 2.f6*ai73External Characteristics ofCascade with f Y 0.of the number of loops W1 and V2,The optimal ratioand theoptimal value of angle a are obtained after the partial dcrivativc--sof expression(3)are equated to zero,v:hich areequal to:(4)andThe presented experiments completely confirm this conclusion.Amodel was created for the study in overall dimensions of AOK 42-4.The armature winding was placed on the rotor.The following typesof windiness were studied:1)standard loop winding with number of loops Wp.2)"zigzag" winding with W 2-pwit 2IA study was made of the effect of angle a on the rigidity ofexternal characteristics, with frequency of the control field fy 0.The testing results are presented in figure 2 in the form of therelationship(curve 1),! 60It is apparent from the figure that with ct 9 0'U f(l).the external characteristics are more rigid than with(curve2) andt O(curve 3).The developed plan of "zigzag" winding with a 90*figureThus,creasesispresented in3.the connection of winding by "zigzag"the rigidityof the external3significantlyin-characteristics of the machine.

ill, [! I,lii!,[ , [ i,, l I!I, ,1,Re" XN i j&1.Figure 3.a 90 el.&&,V. DeveloDed Plan of "Zigzag"1,AtKVinding vithHowever,the most indicative are the regulating charactcristics(fig.4) that were obtained with a fixed control fieldf 0 and e.m.f. frequency of the rotor f 100 Hz.YIt is apparent from the curves that with smallload currents,in order to obtain the same voltage at theoutlet when the windingis connected on the "zigzag" plan, greaterpower of machine excitationis required (curve 1) than with normal winding.However, withcurrents close to the rated, the pattern isdrastically altered.Thisindicates that the amplification coefficientof the cascade with anormal load will be considerably greater for"zigzag" winding sincethe control power for both windings are classifiedas squares ofcurren ts.For example, with power P 4 kU, the followingamplification coefficients were obtained:K 37 for normal winding,Ky 54 for the "zig ag" pItisespeciallyimportatntthat these4relationshipsthat were

Fiue4CscdFiue4CascadChrctrs.euai,,with--withf 0I uai CharactristicsCs ,owtoffP 0. lizi of

&I2020Figurc 5 (continuation)120-o-0.11i-05Figure 6.0.3.5oA0.External Characteristics ofCascade .,lith "Zigza," Winding withCapacitance Load and f 30 Hz.Ywith C O.1.with C 15 pf.2.remain correct even fDr theobtained wich a fixed conLrol fieldoperation of the CascadL' with rotating field of the control windin,.

[jC';"ClitSLtk1.,tC,'.L.5.:td,'30 1l-.f)1Th iIt:. iyi Ids a.tthe Ireqy('1ncv',',-S",'IaIi'xtc a ilzI(,l-t'(nei. f.xJii. 4rt:,i ,-cv (d1t 1!cth. ri,,J di tv of tleI) isI t:!z1o011(1 a '40 be(for ex,.m pe ,it h nainteristicsof the cascade incascadet.h,during re,,ultio oexternalclharactcristicsfor thethat isconnecteda capacitancetransformersincreases the rigidityespecially importantfThe external charac-load are given infigure 6.and amplifiers of the integratednlan instcaof the normalof the external characteristicsthe control power with rated load.for machines with controllable0,.l.i\I. II lOT poii,''ar,on theThis isfrequency.References1. hi. IL 1 ocT C lnrC, L.er.vthie same way as the: norm-al winding.and reduces-curves;type of a winding connected on the "zigzag"winding,fVI.l en w I:., ;g o thec a po cit-mI am) e( iowt:ichent of t he conpe, sating caacit:c, toplan actsthe use indijlCl int(L;l(?o LOthat:the cascade outlct) , the windingThus,t1 1!1i','1,tertII rotor wildiInga'conc; i dingr c!,Iin(r(e,,TnC%F. cir rLfrom;ia.(curV';,,i ,IIIi( Il .73).ici;ij,,i'ieci:MlT'lI.of the

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7 ad-a103 131 foreign technology div wright-patterson selection of rotor winding in collector-free afs oh electrical machine--etc(u)f/ 9/5 j jul 81 a i skorosfeshkin, k khor-kov unclassified ftd-id(rs)t-0659-a1