DE1957385U - MAGNETICALLY CONDUCTIVE LOCKING WEDGE. - Google Patents

Description

/ · "Magnetically conductive. Nut locking wedge"

It is known the magnetic properties of the broom body electrical machines with open winding slots as a result. improve that wedges are used to close the grooves, ·:.-... the whole or part of the magnetically conductive material be -.-. '■' stand" '

.. To avoid additional iron losses, it is necessary to the formation of eddy currents in the wedges largely. to prevent. To achieve this corner it is known To use slot wedges, which consist of a mixture of iron powder and an insulating filler, in particular synthetic resin. In another known type, there are magnetic slot wedges made of sheet metal parts that are lined up transversely to the longitudinal direction of the hat and that are connected to one another, preferably ; are glued by synthetic resin ». .

According to another known construction the magnetic slot wedges consist • ^v aus.dünnen iron wires along the groove to a

running hair dryer made of! insulating material wound into a .., '■ filling compound are embedded and enclosed by an insulating sleeve.

.. ·. ':; . Although none of these types of construction are fully satisfactory in practice "/ ■ - ', up until now, people have shied away from using wedges when- ■" ·.' ■■ The magnetically conductive material extends in the longitudinal direction of the ■ · ■, groove extends / and is only finely divided in the transverse direction, ".:"

.. '"-: ■ · ■" ■ boron Ürtlnd for obviously against such type consist ■■■''·' rising prejudice is likely to be that electrically conducting ^in; - "In the parts of the wedges, tensions of the same magnitude as in fleii eatj sprecIieMen Ificklirngsleiterii" that is, at large KascEiiEea of 100,000 volts, arise along a line, which causes difficulties with regard to insulation of the wedges or their parts was advocated §n * Tatsu, chiich; ^ but such fears are not

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-V-V ". Or the feared difficulties are proportional- ■ ... ':, moderately easy to overcome. In the longitudinal direction of the groove next to -... '...' lying conductive parts of the slot wedge are marked with large ■■; V;. ■ · - "* · This approximation induces the same voltages, so that the insulation ■ The difference between the individual parts is not significantly greater. · Needs to be as mutual isolation of lengthways the groove strung together parts. ■

■. ■ V The insulation of the entire wedge against the groove walls, which . ' V 'must also be able to cope with possible overvoltages

■ '. , .some care, 'but does not make any insurmountable difficulties- "' opportunities. Otherwise nothing stands in the way, the wedges of length '-after to be divided into several manageable pieces isolated from each other-

■. · "■ 'share.''. ^: "

■ ■ ■ - ■ Because of this knowledge, magnetically conductive pre- ' '. '' key wedges for the grooves in the iron body of electrical machines »

"." - "· ■: consisting of magnetically well-conductive- ':'., ^ I tend thin wires 8f ^ fSää ^ £ ä provided in accordance with a design,." ..., ... ·. in which the wires lie in one or more bundles in the longitudinal direction of the grooves, the bundles individually or together. . are surrounded by an insulating cover. Instead of these same-: V V. richteten'Drähte it is also possible to 'stranded> len strands and to press on .a certain amount, i ^;::' the wires as with flexib-V \ V V _v .; . ";. 'Han. Thus receives a compact wire package with a precisely defined'';:/" ■ Vi number of wires «Depending on the required properties, the NutvVj V, wedges between the wires can also contain non-magnetic inserts,. ·;, V- 'which also lie in the longitudinal direction of a groove and preferably. ■ -.'-. ·,. Consist of insulating material.

; '..' · ■ · In this way, magnetic properties can be achieved - '' V -.; - i '";'>.;'which correspond to the number of half-closed grooves. SV: li ^e r ^u hg.des? Individual wires against each other is generally sufficient

j .; - V-V-an oxidation of the surface. But nothing stands in the way, instead V · Vv. ■, de: -3sen or, in addition, a thin coating of suitable insulation

VVj ;;, V ^; liermate.rläl ' _t aB «· made of. Synthetic resin or fiberglass spun pre- ■ VV-W; ausehen.V o.) / V- .- ■ - ^: ',:'·; ■ - ^{;; :} '^; .

. '.'. "The V ^{Iäpl.iörung;;} d'ös whole wedge may also advantageously

n. The wires or wire

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Bundles placed in hoses aiics GloüfaaergespiriGt or with , Ribbons of such a web can be wrapped. The further manufacture of the wedges can expediently take place in such a way that the so prepared wire bundle in a suitable mold in the brought the required shape and with a suitable casting resin are impregnated. The impregnation is advantageously carried out under vacuum and / or pressure, 2.B. in such a way that bringing in of the casting resin. first under vacuum and then under pressure.

Provided that the whole winding with the associated iron body with . Cast resin is impregnated with one or more Insulating sleeves made from 'Giäsfaoergerspinst' surrounded wire bundles as well

be introduced into the grooves without impregnation, whereby they '. wer'deh fixed in their position by the winding conductors lying in the hat. '·. · "■ \' ·

The Α-parts can then be impregnated together with the winding , · will. ''. . '

- ■: ■ ''"-'■-.;' ■., Innovation

^. In all cases, wedges differ according to the

^; ', In that they have. Of known embodiments by a very substantial mechanical I'e-ötigkeit in the longitudinal direction, which is at the DER, driving' ¹¹ GiIe in the grooves advantageous effect. Included

are they .relatively quick and easy to manufacture, whereby '. the necessary to manufacture the insulated winding conductors - '■■ "■ · ■ chen machine" facilities can partly be used ■ • '■'. '' The proportion of iron in the ITut wedge can be determined very precisely ; '; '· And comply *' · .. ■ '■

'■'; yc: '■■ In the Fig. T .i.öl; for example a magnetic ITut wedge according to .v ': \;.: öer sfSfSc & Xil ^ .l shown in one of the possible cross-sections; V '^. With 1, the bisend wires, which can have a diameter: U: / ;, of 0.5 mm, are denoted therein. The wires are surrounded by a V ', \ Isolierhulle 2, the spaces 3 are with cast resin; P-. Filled in. '■ /. ■

\ Die Pig «2 shows another example in which the wedge has a

Inlays, 4 magnetically . Has non-conductive material. The “insert 4 can be made of any insulating material, advantageously such

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exist, which bonds well with the casting resin and together with this forms a solid body after hardening.

To facilitate manufacture, it can be useful to use the Divide the whole wedge into two or more wire bundles that each surrounded by an insulating cover, e.g. in one Introduced tube made of fiberglass and then together 'pressed in a mold and impregnated.

An embodiment of this kind is shown in FIG. 3 using the same reference numerals are shown. It is also possible for the wire bundle surrounded by an insulating sheath and, if necessary the insulating material insert still has a common insulating sleeve, e.g. a hose or a wrapping made of fiberglass to be provided.

innovation
The & R £ Ja £ ätüCäg is not bound to the illustrated embodiments! but is capable of many modifications.

■; / ■ ■ ·.

Claims (2)

1". Magnetically conductive locking wedge for the grooves in the iron body electrical machines, consisting of magnetically highly conductive, embedded in a hardened filling compound, thin wires electrically insulated from one another, characterized in that the wires are in one or more bundles lie in the longitudinal direction of the grooves, the bundles individually and / or together being surrounded by an insulating sleeve. 2. Magnetically conductive _locking wedge according to claim 1, characterized in that the / i) wire bundles are stranded like strands, the wires or 3 * Magnetically conductive ^ locking wedge according to claim 1 or 2, characterized in that the wedge is exceptionally good magnetically. conductive thin wires also magnetically non-conductive 'inserts, preferably made of insulating material. 4 · ■ Process for the production of slot wedges according to An .. Claim 1, 2 or 3, characterized in that the magnetically conductive wire bundles and optionally the insulating material inserts individually and / or together in one Tubing made of fiberglass or wrapped in a ■ tape made of fiberglass, then in a press ■ shape brought into the required shape and with a casting, . resin impregnated. 5 »" Process for the production of slot wedges according to the , Claims 1, 2 or 3, characterized in that the ... magnetic conductive wire bundle and, where appropriate, ■■ '/ insulating individually deposits and / or incorporated together in a., «·, · Hose made of glass fiber web or a, , "'..] Wrapped around a ribbon of fiberglass and then inserted into the grooves above the winding conductor, V. - 6 - 695/66 6 «Process for the production of slot wedges according to one of the preceding claims, characterized in that the impregnation with casting resin takes place under the application of vacuum and / or pressure. ■ : \: .. ^{; ι} > ■: / ■■■■■ ·