Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
CA 02322422 2000-09-08
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Descripti~m
ventilat:ioil sysrem for the field winding of large
salient-po].~a machino3
J
The i nventior~ x~~Zates to a venti.;gt,ioil system
s«r a s>rar-Shaped f. field system of a 5talient-pole
machine, w.i;>1 a gaseous cooling medium providing .Cvraed
cooling =or the ~i~lc9 winding. DuCl1 sa7.ient~pole
1C1 machines arm c~en~rally uaed ac generators, in
paz Llc~~lar as hydrOeler:t.ric powAr generators .
Figure 6 shows the principle of a salient-pol~
maChlm: a winding 31 is arrangeti on the c:yi :lndrical
inner suzface oL a stator part 30, for example
15 comprzstnd coils in3erted ~..nto slots, around ~t:hP field
system, which ~~l_ai-es about the ~wt.or ahatt 32. xhis
Field system comprises limbs which originate in a star
shape from the .rr~tnr Qhaft 32, are mac3netizad in the
radial, dS,Lectinn, and h,~ve e~lter~mi-_ing polarity. Ill O:hQ
ZO illnctrated case, fouw pairs of such mar~n~t;.ic Foles era
prov~,dad, Lhat ~_s to say eight limbs, which are
separated from one another in the tangential direction
by pole gaps '1 , wh~,Ch thus each PXCand tp an eild
windi n~ area 33 like pieces of cake and are a>".t-ached td
ori~ another via these and ,,a,ir~ding a.r.p.~s_ ~,aoh I~.mb i5
in adc~h case magnetized by a field winding 21 running
~~out a pole 3hdit_ 2~5, as a rule flat. c:oppr~x Conductors
or eilrlllar conductiYe strips which form ttlt~ivi.dual
wi,rsding layers, which are each sepa~~ated bar insulating
3U layers. In order ;_o guide iris mar~nat.ic Field whir'h is
produced, the pole shafts ;ire cash fitted !with a pole
ohoe z0, whi rr, is in cacti ca~c~ arranged in the arid
wiiic3i nc3 area 33 a t the Qnd of the fi,e~,Cl winding. ThG
other end of seen pole Shaft 20 m~arges into a rvl.or
3 5 yoke .'l ~ _
In this c~asa, large salient-pole machirte3, such
~W ~s~ required for ratinr~c in the Megawai:r range,
,allow the rotoz s'ha:~~t 32 to be da~ign~ed as a hollow
Received Sep-05-00 OO:OGam From-+48 8131 ?32218 To-Smart i Bit~ar Pase 002
CA 02322422 2000-09-08.
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sha~~ is order to it~Lr.nd~~r_.e a ocolinq medium ~rfa the
cavity 34 ln~.~ th~a poly gap3, which cr»1 Trig medium
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CA 02322422 2000-09-08
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can then b~ c:a rr.iQd away out of the ~sr~ci w i nc~; ng areas
via appropriate outlets i17 Wt~ srator part.
The loss~~ whir,.h occur in the field winding3
mull. br, dissipated in orders to lim i r. the temperatuxa
and nece~oito,te inteuss v~ ~ooli,ng of the field sy5t,em.
fhe coo7.ing is provided by moans of a coo~.1 nr.~ gas =low,
which is pasocd through thp cylindrical interior of tt~P
Stator pax~l,. for which purpoEC there ale Cwo normal
~r'rsions
1U first7.y _ r. he natuxal rotation Of ~f~r rntOr aCtE
ors d pxes9ure sources for the ver~Ll7.ation system without
any additional fans. The prior art in tlsis c-.~se is
rep.rpsented by DE--11 105 15 264.
The qaseoas c:cscsl3rs.g m9dium emerges from ~s~ot.s
in tr~r: rotor yoYr~, and flows ra.did7l.y into the pole
gap. The heat f~.ow from the fiat cvppcr ccnducl.ut~s
(arirtd~.l'1g ldyr'rs) toward. the pole shaft i ~ ~ nw, owing to
ths~ high thermal resistance caused by the electrical
insvlatium hRtween the gield winding and the pole
shaft. The majority of the treat flow is thus emitted t-.n
the wolfing ai r i n the pale gap and iz~ t>ara Pnc~ winding
arQa on the side p~ the field winding facing away from
the pole alsr~.~t _
The speed, which prcrvid~as the cooling, in the
e17,t3 winding aced vti the and face9 of the field winding
is c-_nnsiderably greater than the pole gap_ The cooling
is thus also more ir~tPnsive here, and the cone9uc-t~r
tampa~al:ure a.s thus lo~rcr.
Tn ordez' to etZlarge the cooling area, voo.li ng
ribs aye locatAd on the flat oop~rei c:candurtoxs, on the
side taoinq away Lrc~rn t-.he pole shaft_ These Lids ran
axially in th~a pole gap and in Ltm circumferential
directson in the end reginn_ Since the cooling ribs,
which a~.;e airangp,~i axially in the pole yip, ar2 at
riylsL ri.ngles LO the radietl dirr,atiran of the coolant
flow, the irscidetsi~. a=7r~w h~re is across ttse ribs. The
heat tzwcssfpr from such rib arranQerrrr,nt-.s is
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CA 02322422 2000-09-08
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- 3 -
not very intensive. T1~J ~ is a major ~li~arlvantage of
this ve;ntilatiom system 3,n terms cW cooling the rield
winding.
5eaondly: Lwc~ fsras Which azw 'titled a;eially
with respect to >rhe poles and fore the coolant ~c~ flow
axially into t;he pole gar are generally ~t~ed a3 a
pressure source. In this Case, fire field winClimy is
cooled by this axial flow Qf zhe cooleri't:. which then
'sows radially i~u_c stator cooling channels. Me~tsur-Rs
1U can be provided fox a reverse flow betweeli the ti8ld
winding and the pc5la shaxt in order to inten3ify the
cooling of the field winding. This results in
ac~dizi,onal heat ~l.issi,~ation from the rec~ton between the
field wimcW nr~ and the pole shaft. The pri~rr art ft~t
w.~ch revexse tlc~w maa~ures can be found iii
EP 0 ~t15 OS7 fil _ Z~he C~1.'52~dVdrTi'.af~~ pf this cooling
slut ~ on is the liiyh design dad r. echno3.ogical
Conlplcxity.
Tn largo cylirrdri_ral-rotox machine, Wl~iCh arc
2p used ~,s tulv3cwJ~IleT$'COr3, the field winding is
acCOtnmociated in ;,lots. In order to ensur~a intensive
cooling, redie.l ~1 ots arc located i n the cCnter of 1-he
comdur.,rors, within thz plot area. The gds~ous coolant
flow$ through i_tcP slots and cools the Meld windinge.
Such a conductor arxangPmPnt fox cylindrical-rotor
machineE ~.s the sub~act matter of wo 921vu14o. Tl,i
vooling r~nlutxon i3 not suitable for salient-pole
marhine8.
The invention i3 k~aapd ors the pb~eca of
30 ~rLwviding a highly erf-.ACtiue cooling ~c~ ration for the
field wind.i nc~ of laxge saliWlt-ph1 P maChinc3, in whi ch
S~luti.on the Cooling ~rpa l.s enlargad~ anti high hc~tt
transfer coeLfic~,ents a~g achieved, by Simple ddsign
measures_
35 l3ccordimy ro the ir~ve171:ic~n, the object is
echievec3 by providing up~nings Zn the winding layers,
which openings farm :Glow paths in wluic:H the coolant i5
likewise cdrrl.ed radially
Received Sap-05-00 06:06am From-+49 9131 732219 To-Smart 8 Bistar Paso 005
CA 02322422 2000-09-08
off. n9. no 1 ~ - 09 s~ert8 ZL~ 8 s msrz.Fl~7S FTBL Sp6
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outward, in the same Way d.5' lrl the pole gaps, which,
flow paths h~wF?ver, lead through the il9teriv7Z cL l_he
windings, along the side of the fiEld winriing facing
allay ~rom tree ~rcle Rhaft. 'These tl,ow paths open
cti rPrtly into th6~ end winding 9rers or intc7 t.hP part of
the pole gasp which merges into r.he end winding arcs.
Tl'm~e window-like openirxgs d,n the ~ri.nding ydy~st~ c~!' t:ha
ti.eld winding considerab7.y enlarge the cooling area,
part~.cu.lar~ly i n r hP end region.
IO The coo~.ing air flows vi rtwally radially
through the cross: spr..tinns of the openings, which may
havr~ any desired outli.nc contours, at app .r~a~ci-na.tely the
same flow Late d5 in the Bole gap.
2'he flow paths may in 'this vasd he straight,
but they may also tro ve :sends. 'uhe coolant i3 in this
case likewise carried radialXy outward, in the same way
as in the pole Qaps, ~nct r»is is thus "parallel
c:c~rrnetaion of additional coolant flows" . ThaCP
"paralJ.e1" flow path3 rcsulL Ltvm the fact that thes
W111dUw-7. i. ke openings incorporated in the winding ldywrs
(for example flat copper conductors) are not covexed by
the irtm.rlat:tng =avers arrariged between the winding
laycro and the openings i.nr.crpcrated in trhe winding
layers era located one ax~ove the other, aZthouc~h the
~ 5 insulating material may pro j ec~w. ~ 1 i gt~tly into tho
window-like ~pPnings. tn order to prevent flashover~s
betweon the winding layers ("a winding shnrr_"~, the
edges of these w.indcw-like openings must not have any
hnrrs .
As EI tulc. the f_.1 ~w patTls originate from inlet
openings which arv termed by appropriate w.i r~c3c~w:~ in the
lowermost winding layei or t.hP field Winding, in which
case th~a edges of the3e inset open i tgs are
advantageously rounded cfr inclinec9.
3~ The flow is not impeded by nny struc~t:urw7
detailed Solutions when it emc~rga~ i=r. om the end or the
uppermost wit~diry layers and the pole shoe.
Received Sep-06-00 OO:OOam From-+48 8131 :32219 To-Smart i Bi~sar Page OOG
CA 02322422 2000-09-08
n 5 , r1 9 . f~ r_1 1 ~ ~ O 9 >k f~r H Z L~ 8 5 t ri r~i Fs 1V S fi H L S O '7
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These and fuxthcr advantageous LefinPments of
the invention are specif..i.pr7 i n the dependent claims .
The solution according to the invent. i.mn
r=onsid~rably inten;;3Fies the cooling err t'rte field
winding. T1m ~iev~1 c~pm~nt margin thus crcatgd mey be
used in various ~rayo, for example tn rpciur..e tllQ
temperature of i_W f-iraid winding or to incxeaae the
eleet.rcsrnac~n~atio utilxxation. The ffold rrincliiy In large
salient-pole machines may Lliua ?~e dQSig~naa to servo
1~ material anr~ sF2ra. Gilays are thus created to im~rrvvr
the efficiency, in particular by seducing the
ventilation lcss~s, by ~rirtua of the cooling bei~,g
.i nt-ensifiecS,
The advantage of Ltne i rov~antir~n can also be occn
1s im t..hat it can be used not only for now c9r~s i gn:: but
also for modification of existing machines.
The invention includznq advsntagevua
refinements arc described in t:~r~ fnllowirg zexc With
refezence t~ the fag~.~res, in which.
~t~ r'igure ~, showa~ a schematic cross ~e~~ ion of a
sector A of rigors 14,
Fic~mra 2 shows a view of the outer edge reyicm
of a windin4 layer. and oL t.?~ra wi.ndow--like openings for
forming thc~ flaw paths,
2S t~iguxe 3 3hOW3 8 sChem3tlC RPC_t.i can through a
riutnber of wirlc3 i rrc~ 1 ayArs r.rith insulating layers located
in hetwesin, and flow path3 passing thrvur~h,
rigors 4 tihc~w~ ~ section througZ winding layers
with cooling surfaces on the outer edges,
Fir~ure ~ shows a section a~ in Figure 3 wlCh an
UuL~w edge region whoQrr height is leas than that off' t>,w
~rinding layers,
>s'igure 8 ~lmws a sPr_.rion as in Figure 1 with a
riis~lacemeat body in the pole gap,
Raeaivad SaW-05-00 08:08am Frum-t48 8191 P92i:18 Tu-Smart i Bi~~ar Papa OOt
CA 02322422 2000-09-08
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2d-SET'-~bl~id 1'x:16 1-N.UM TO 5~131'ir31~40G P.08
GR 98 r 8657 ~
Figure 7 shows, a ~eotion as its Figure 1 with a
guidance device in the Bole gap,
Figuxe 8 choH3 a Section a ~ in Figuxe 6 with a
nai~,ou displacement body,
Figure ~ shows a section t:r,rough an end
winding,
Figure lU sklows a section Lhrough a .toot of s
fiald winding,
Figure 11 shows a section as in Figure 3 with
sid~ apertures on the i7.ow paths,
Figure 1 ~ shows a eECti,on ss in Fiyurr~ a with
wi.ndihg layers Whose opemiugs have ditfarent cross
BeGtions ilu an a l.~ra..rnating sequence,
Figure 13 Shows i;t secl_~c~r, as in Figure 6 with a
di3placement bcm9y ~,agport~d on adjaGen'~ field windings,
Figure 1~! shows a Section as in Figure 6 with al
displacement bony wer which 'the pole shoe ~nydyGS,
k~igure 15 3how$ the view of a salient pole with
a pole shoe anal i.He field wind~,rrg located ut7darimdc_tz,
Figure 16 ahosas the alredriy c~Pscribed. layout of
a salient-pole maGhim.
r~mponPnts~ having the same function have the
same reference symbols ii>! this case.
Figure 1 snows the routing of tlm coolant in
23 the ragieri of the pole c~dp 1 a.nd 'Chrough the "parall~1"
flow paths Z 1 n the xegian of the end 3 of c~tm or more
flat copper con,ductora 4 whi.c~h ia'n. rm the winding layers
of the field winding Z1. The winding layer: are in each
ease itl~sulated from one another by an insulatine~ layer
5. In the area 13 hetw~an the rotor yoke 1~ .and the
riexd winding 21, tlZe a~~rang~amant (without any
additional guividmc:~ de~ric~s at thin 3tagel fozces the
flow to ba split firstly through rho ~,oZe gap 1 and
secondly through the g~ ra 1 '1 el f low paths 2 in the c,u~er.
edge rr~yion 3 of Zhe flat copper conductors 4.
Received Sep-O~J-00 O6:Ofiam from-tb9 8131 T32218 To-Smart i BIiQar Paae 008
CA 02322422 2000-09-08
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~R 98 h 8657 P
additional. guidance dewic:e, fray splitting and
guiding the flow of cc~W.anr_ rnay be arranqe~3 iW _lm ~rr~d
Z3 between Llce field winding 21 and the ~~t,or yoke 1'!.
Figure 2 3howa dti ~xamrlary ernbodimerit c~L
rcctanquZdr o~~ty i nc~~ 14 in the outer edge reyinns 3 of
the Llat copper conductors 4 anti of z>ae iaaulating
layers 5 . In this c~ tee, the view of an end wir~cj.i ng, as
shown in F; r3ure 15, illustrates Llrat the flow paths
~Cogether with the opc111ing5 la may alto have a <:i rc:,>>.ar
cross ~rQrtion, ox any other desir~rci cross section, etnd
may open into the ettd winding exam in the r-ac~i,a1
direction ~t a part 35 of the encd wixiding which
projocts beyond the pule shnR 10, The flow paths ale
preferably z~cmt~ti in an approxitnetsly idc3.i.a1 direction
1S along those outer 9urfa~~:~ ~~ of tile field winding
which face sway from the pole Shaft and ~r~inr toward
c.ltd pole gap :1, that is to say the surtaco areas 36
which are lo~dl_~d >aatwean tcro salient pules, while nd
flaw paths or oporcinqs need be provided between the
pole 3ho~ etnd ~lr.c.~:~P nut2r surfaces 37 which hound the
tl.~ld winding in the axial direc:~t~.ar~ _
For flat copper conductors 4 which axis 7.ocated
one shove the other and era i:~r~l.at~ed by in3ulating
layer8 5, Figure 3 Slmws how the Opcning3 ~.9 iti the
outet ec3ye regions 3 Of the winr3i nc~ l8yars 1 arid
insulating layers S form the f~ow paths 2 to the regi.nn
i.n the pole gap 1 and >rOward the end winding area . The
openings 14 of n1I the flat copper aonduCtozs 4 and
in3ulating laypr~ S aro in this oase the same, with the
insulating l3ycr3 5 extettdi.ng as far ao the edge yr the
opcxzings, vi slightly bayn~nd the e~l~~, in such a way
that: they in practice do not adversely affent the flow.
Figure ~ ;rmw~ an arrangement corresponding to
Figure 3. In order to improve the heat. transfer in thc~
rPgiosz of the polo chap 1 and of the end windit~y area,
cov~,iy ~u.rtaces 14 are also arranc~pd on the outer
edges 3 Of the f7,st r.:vppPr cOriducto~'8 4, fOt example
externally c:onr.inuous or interrupted, axial or radial
Received Sep-06-00 06:06am from-td9 9131 T82219 To-Smart t 6laaar Pale 909
CA 02322422 2000-09-08
n ~ . r_n 9 . n n 1 ~ ~ r_n 9 ~e Gr 8 Z L~ a s 1 .rs ra Fs 1V S Fi 8 L
g~-S~-~PIGa~ 1 s: y h FRUM TO 9004'~3131'r314>3G P. 1fl
CR 9~8 1' 8657 F
._.
Cooling ribs 15. or coo~.ing ribs 15 which are rotated
at thei.z rwt r~r needle-ohape cooling ribs 15.
Received Sep~05-00 O6:O6am From-+d9 9131 732219 To-Smart i BW~ar Paae O10
CA 02322422 2000-09-08
n ~ . n 9 . n n 1 ~ ~ n 9 ~c r 8 Z L~ 8 s i is ra F 1~7 S ~Ti 8 L S 1 1
04-SEP-~~0C~0 15-' 17 FROM TO ~991.31.'731d06 P.11
GR 98 E 865? p
Figure 5 shows a schematic swticmr illugt:r.acion
of a detail ~L t:hp field winding 21 with the winding
layers having a reduced height iri the outer edge region
3 of the flat copper eonduntn.rc ~_ The insulating
' ~ ~ayerc 6 are arranged only ire the region where the
height is not reduced. They may al~u ~raject slightly
iWu LW region where the hoight is reduoed. Tn the
region w1~~~s the height i3 reduced, an open c:r~nnPC-.ri
on
i (~,ptZ~tui ~ 1 i~ c:rw~ t ~cj bQtween tho pele gap 1 and
the
flow paths 2 in the edge region. This c:umrig~~r~ation
has
i the advantage the>r t-i~~r~ is no need to debu.rr the
cdqe3
of Lhe openi~g~ 14 of the flat CoppCr COtieluc:l_c~rs
4 anci
the flow c:am be exchanged betWQr~n the region a the
' pole gag 1 and this parallel flout paths 2.
Zn the seca~l an i n Figure 6, an elongated
di:~pl.s~o~ment body 16, ror a salient pole machine whose
cOOl.ant is supplied via slots 1.1 in the rotor yoke 1:?,
can 1;11? SZP~Z1 in the poh~ gap ~.. The displacement
body 16
is aligned in the exidl direci.ium iapproximately
pdtdllel t.c~ r.hR rotor shaft) . It efstends over the
majority of the axial length of the 5dli~rn. pol~s. at
is thus pass i t~1 p r~ in ore~tss the coolant speed in
the
pole gap 1 and i,n the lnw paths 2_
Figure 7 shows tho schematic section
a.llustration of an exemplary embodi.mRnr_ having
a~;lcliLic.mtal cooling r. i.h~ nn r_he outor side edgos
of the
fia4 copper coriduCtor3 4 and quidetnce dcvi~rrs 17 of
a
salient-pole mac:r~i.nP, ~in which the coolant flow
llkRw~ts~ emerg8s from slots 11 in the rotor yoke 17_
Tho guidance devices 17 extend in the axial direction
over the ma.jor~.ty of the axial 1e11qth of the Salient
poles i.n the pole gap 1. Fac:h c~uidanc~ device 1'~
~:muprises an attachment element 23 and ane ox more
guide v'anos 22. The guide vanes 22 projeot from tho
ah.l.ac:Zuu~ut_ body 23 obliquely into the radial low
( incidence angle a preferably 1P:~:~ t-.h,n ~0 ) and
then
continue s~Ltw9ght: nr curved. The extent of the guide
Recrsived 9ev-05-00 08:08am Frum-t48 8191 292218 Tu-Smarl i Bi~~ar Pare 011
CA 02322422 2000-09-08
n 9 . p P1 1 ~ - r1 9 ~e r_t 8 2 L~ b ~ i is .~z Fs 1~7 S Ts 8 L S 1
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GR 9A P 8657 P
- ga -
vanes 22 in the dixectiot~ parallel. to the rotor shaft
pxaferably corresponds apgroximar.aly tn t.hr~
Rnenivad SnW-00-00 08:00am frum-t48 81J1 t9EE18 Tu-Smart 8 birrar Parn OtE
CA 02322422 2000-09-08
r_n~. 09. nr_n 1 ~ - r_n9 ~CrB 2L~ H s i ssr2~lVS T8L S 1
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Gg A8 P 9657 Y
c~ -
extent. c~L t_he slotR 11 in this aXia.t direction. Ths
number of guide vane3 i3 preferably isvC. yieater. Than
the number of slut_5 . For t,hP cony ant flowir~g in tile
radial direction, the pole qa,p offers et flow ~LOss
section which is considerak~ly largP.r than trie cross
spca.icm cc:rupied by the guidance derticoo.
In order to improve the flew ron.~ting, the guide
'vanes 22 nirly h:~vr~ additional boundariee in the axial
direction and may be arranged inclined w51.1~ reqpect to
l0 the dixwc:t_ic~n t_Hngential to tl7e rotor shaft. Arranging
the? gtt,idance d~vicee 17 irt the pole gap _ result_5 im
high flow rates icy elm reg~.c~n of the guidance devices
17 and gives the flow an axial cdmponexzt, prefe~:ably
toward the cooling surrdc:es cf the field winding in the
pole gap.
Figure 8 slmw~, ~nhPmatiCaily, another
exemplary emhodi~rtmnt for Ealicnt-pole machines in whica~~
the coolant flow emexgeS FL'Uitt slor.g W in the rotor
yoke 12, with hollow displac~meat bodies 18 hewing
dt7 outlet, noxzle3 1~ towaxd the fir~ld winding being
pfov'ided. The hnll.ow displacement bodies 1B are
arranged over the majority of the pole lrryth in the
pole gap '1. in the ax~.al dir2ation. The hollow
displacement body 18 is open to the area 7:~ t~et.v~reen the
~i~eld windiry 71 and thra rotor yoke 12, eo that the
coolant flow can flout directly f~com the sl.r~t.s 11. in the
rotoi yoke 12 lm_u t_he hollow body. The axial length of
a hoJ.low body 18 is preferdbly qtedt_rL than nr
correopond3 approximately to t_he ,axial length of a slot
36 11 i.n rhR rotor yoke J.2, and the nLlmber Of t.lzeiu is
pxcfcrably no greater i:hatn the number n-F slots l7. in
the rcrU.r:r yc~xP 12. fhe nozzle-like outlet 19 msy lee
straight or tw'istCd, with an arlr~.i,tional directa.on
change being proujuced, so that the flow is given an
aXia1 component. Additional guidanc:~: devir_es may be
arrattgec.l imsicie the hollow body 18.
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CA 02322422 2000-09-08 s i
n ~ . r_n g . n n s ~ - r_n 9 ~ r_rr a z n ~.: 5 y a ~..~ F~s l~r s F 8 L
ow-:SF'P-7~1 15:1ti I-t~.~rt TO 0~'~''Ji3~.'P31408 P.14
GR 9Q L~ F3 X57 p
_ gg _
In ilytITP 9, the and win~imy including the aid~
~ciye~;~ i~ covercd bY t11~ ~~1 P shoo 1,0, that ib to Say
the length
Received Sep-05-00 O6:O6am From-+d9 9131 732219 To-Smart i Bi9aar Paae Old
CA 02322422 2000-09-O8~ ~7 S ~ 8 L S 1
r_n~. n9. nn 1 ~ - n9 ~er_rH m-, b-. ~ .. ~.__
p~4.-.c~~p-~~Idld is: ird FROM TO ~049913i'~31406 P.15
GR 98 P 13bb7 P
- 10 -
of the ,E.»1.e shoe 10 pxojerring b~ypnd the volQ shaft 20
is equal to the width of the flat copper conductors 9.
Tn this ~x~mplary cmbodiznent:, the upper fl8t copper
cV.ridllC>rOr Or col7dULLc~rs 4 haE o,r havr~ aperture, B to
the enterior.
The ~oot of a field windirzc~ m:~y keg deoiQned
with Inlet cyeT.;ing$ 6 in tloP lower Flat copper
conc3ucrar '~, as shbwn in F~.gure 10 _ The edges of the
inlet openings 6 are rounded in ~rdes to reduce the
inlCt lC7SCQ5_
Aa in Fiyurp 5, according tn_ the ochernatic
illustration in Figuse Z1 but with d different
~xQmplary embodiment, the oui:Er edge region 3 of the
winding lay~r~ matr in each carp tea lower (extent. in the
radial direction) tt~azr the region of t_hP winding layers
between thw pile shaft 20 and this outex edge rc~yion 3.
Im r.111s caavo, the inm.~lating layers extend only over
this intozu~~c3~ia,ta region, trzdt 1 s Lo say they ~ic~ noC
ext~and into the edge region .i, or extract ~nlSr Slightly
into the edgy region 3, with t_he reduced height. The
openings which foam tle flow paths in the winding
layers ere pre~~rabl~~ located iu t_h.i.s serge z~egion w.i.th
reduced height, With th.P spaces betwzeri i:hp winding
layers of reduced height l.Cay~,ng I rRA apertures r~tii c-h
connect the zlow paths to the pole getp. 3uc:h apertuxee
to the pole gap can r-ontxibute to e~f apctive cooling cW
fihe field ~rindzng_ Tutus. i n contra3t t~ Fi guae 5,
.i..nterrupted lines are used in Fiyu.re 1:1 to indicdt.e
that, iri crctpr to form the f7. ow path3 2, w~,r~ciow-tyke
opYn i ngs 14 in the w i nding layer3 Wtii c_h era completely
surrpurided Hy the material ~t thr~ winding layers need
not be rrocrided in e~srery cased in fact, the winding
layers may themselves hgve apertures wY,ich compTRtely
coiiliect >=he flow paths 2 yr openingls 4 in the ed~te
region of the wincing layers tn 2he pole gap ~_ Tho
edge rPgicn :3 of the winding layers then amts ae an
a.r~ditional coolimy r~,b on cacti wicrc9i ng .~ayor in t.tc i
Recelvad Sep-O~J-DO O6:OBam From-td9 9131 132219 To-Smart i Blaaar PaQ1 015
CA 02322422 2000-09-08
n~. n9. op Z ~ - O~J vcr_rrH ZL~ b 5 ~a~-~F1~7S fi8L S 1 B
~-~P~?.~00 15~ 18 F~i01~1 TD 9043499131'731~6 f'.1G
GR 98 P 8557 8
- l0a -
roqion. These apertura~s ~aay each be provided on thg
outermost flora p~~115 in oaCY~ individual winding ley~r,
Received Sep-05-00 OG:OGam From-+49 8131 232218 To-Smart i Bi~sar Pats 01G
CA 02322422 2000-09-08
n 5. n 9. 0r1 1 ~ - n 9 ~er~rH ZL~ 8 5 1 nrdTil~7S TsBL S 1 '7
04-SEP-20r70 i~i:lt~ FBI 'f0 9n~.4J~J131'T3S4n6 P,1~
rR 98 F 8 657 Y
- 11 -
but pr:~fecably, howPVer, only individual openirigm
and/or individual winding layers have such apertures.
FurtherrrtOt;E, the intrrr.'rupt_~d I,~,nes 'in ~~lgure 11
also in~icate that the apertures 1~1 in the individual
wfriding layers need not necessarily t.re ~f rha samr~
si~e~ any Wp Qdgps of these apextu»'es need not
necessazily be aliqned Hlth one anothet. This ice :~howr~
even mare c,ledrly i n Fi gur. a 12, where the cross section
of the operaings 14 is chosen to be smaller sad larger
11l do d~.~:E=1'Sldt.1j1C3 S?f;i,1?T1f_'.E?.
'j'he exemplary embodiment shown i'.n Figure 13
Contains a c3i5p1sr,:Pmanr. body 1~, which is arranged in
~che pole gap betwCCn two adjacent salient y~ol.es, ic'i the
same way as in ~L:m example in Figure n. However, ch~
:l5 di.srlacemen,< body 16 in figure 13 has aide surfacaa 26
by ntcan3 of which it ~.a Supported urW _l~e f..i p1 c~ w.indings
of. rh~ two adjacent salient poles. Thc~c supporting
Side Surfaces 2G preferably ext_~mc3 virtma~ ly ovQr the
erit:i.rt? 1 Pngth of the Side edges Of the w~,nding layers,
2U that i, to say vrtuglly ever Lhw entiro a~iRl length
of the t~.wn ac35aCent field Windings. Zt may be produced,
for exc,zmplc, from solid light alloy, or may have a
carrt.ty irr oi~dPr to reduce its mass- In order to improve
1=he cooling, the coolant can l~.kewise fl~rw through Such
25 a Cavity. Figure 13 shows further f7.ow pat3zS 25, which
connect the area around the pole fbvt to ~ller and
winding arsa and iynp~ova the cooling of Che winding
layers, which are incorporated in the displacement hudy
(to be more preciaC: in the r.eg i c~r~ which is ~td~acent Lo
30 thR s,~pporting out~r surfacoa 26) in order to improve
the cooling.
furthermore, the supporting outer surfaces 2G
of the displacement body ~.6 drr~ a~lvanralgaously formed
by one or. more elastic intermediate layexc 24, which
35 compens3tc for manufactufing toleZdW ~s i-~ the field
winding ~cui t_he di.sglacement body.
Reedived SeN-09-00 08:08am Frum-+49 8191 TS2218 Tu-Smart & Bl ear Paid O1P
O ~ _ 0 3. r~ O 1 ~ - n g "~ ~Cb, 02 ~22_422b200~-09, 08r~ ~r S ~ s L s 1 8
~--SEP-~ 1:19 FROM TO 900499131731406 P.1B
CR 98 P 8 fi57 P
- :L:~
3u~.h a displdCement body. which t:r~.tciges rhp
entire distgrxce betwvon two adjacent field windirig~
?that is to say the pole gap 1), suppofts the pole
wimdind~ wi t.h rQ~Pr=r..r r..a ane anathEr, thus avoiding
deformation of th~ field system_ At the same time, the
coolant flow c:ari he spl i i_ ~.md .romt.pci in an optimum
manner in this way.
The best mechanical ~etent.i.C)tr wciuld hp c~f,f_ereri
by a tilling compound which vi,~ctually fi113 the entire
pole sap L~Lween 'r,P~e Lield w.indiny:~ ae f.ar ~g thQ rotOx
yQko arid from which on7,y appropriate acce8a channelo
are cut out to farm the flow paths 2 and to Lvmu thp
furtha.r flow paths ~5_ Since, however, supplying the
coolant through a hollow rotor shaft and correspori~ling
m.Wlwi-_ Slots in tho rotr~r shaft ngCessitatea a large
phys~.cal site, the cvrrespdndingly large pole gaps Gan
be f.i 1. t sd orily wi r.t, d;.tfirulr. y, far praBuction reasons.
It is thu" better to use a prefabricated displacement
iJOdy - i I Lwt~uirEtc3 w r t.f~ sa i d A:Lastic intermediate
layers 21 - wh:~ch io then attached to the field
windings f for example usirry a pnfit.i ng c_-.n;nrc~und) _ A.
further option for mechanical retention is shown in
figure ~.4, wlxose pcil~ SHcie rc~rEtr~ the outer edge region
3 xnd projects so far over the outer Eide edgco of the
'5 winding layers that it engages oven tyre di;aplac:emPnr
body 1!i_ The part which this engages over and the
supportirte~ side surfaces o~ the displacemezo~ holy
thRn represent a virtually positively locking retention
means for the di3placement body. The flow pd~.hs
formpci by the OpP~,fngS in the winding layers, and the
further flow paths 25, ms,y in this case Jac routed
LI'mough c~u~_leL onani nqs in the pole sh0~3 or - as is
shown in Figure 1Q - around that part of the pole show
over w1-~ich this eugagP:~ .
~rhe features specified in the dependent claims
and the descz:iptions ~I the i nci.ividtiaJ figuros may
advantageously be combined with one another to form
further ehemplary embodiments.
Raw ivud SeW-05-00 00:05am Frum-t48 8191 ?92218 Tu-Smarl 8 Bi~~ar Pairs 018
