DE539161C - Laminated iron body of electrical machines equipped with air ducts, in which the iron body is divided into individual stacks by means of spacers in order to create radial cooling ducts - Google Patents
Laminated iron body of electrical machines equipped with air ducts, in which the iron body is divided into individual stacks by means of spacers in order to create radial cooling ductsInfo
- Publication number
- DE539161C DE539161C DEB145829D DEB0145829D DE539161C DE 539161 C DE539161 C DE 539161C DE B145829 D DEB145829 D DE B145829D DE B0145829 D DEB0145829 D DE B0145829D DE 539161 C DE539161 C DE 539161C
- Authority
- DE
- Germany
- Prior art keywords
- iron body
- spacers
- air ducts
- stacks
- electrical machines
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
Description
Es ist gebräuchlich, den aus Blechen zusammengestellten Eisenkörper elektrischer Maschinen durch Abstandsstücke in Stapel zu unterteilen, um zwischen den Stapeln Durchtrittskanäle für die Kühlluft zu schaffen. Bisher sind hierzu ausschließlich metallische Abstandsstücke benutzt worden, die in unmittelbarer metallischer Berührung mit den angrenzenden Blechstapeln standen.It is common to make the iron body composed of sheet metal electrical Machines can be divided into stacks by spacers in order to create passageways between the stacks to create for the cooling air. So far, only metallic spacers have been used for this purpose, in the immediate metallic contact with the adjacent stacks of sheet metal.
Die vorliegende Erfindung beruht auf der Erkenntnis, daß diese Art der Anordnung der Abstandsstücke zu wesentlichen Wirfoelstromverlusten führt, da je zwei durch Abstandsstücke miteinander leitend verbundene Endbleche benachbarter Blechstapel bezüglich der Wirbelstromverluste wie ein volles Blech wirken, dessen Stärke die doppelte Stärke der üblichen, voneinander isolierten Bleche der Stapel beträgt. Dadurch ergibt sich in diesenThe present invention is based on the finding that this type of arrangement of the Spacers lead to substantial eddy current losses, since two are caused by spacers End sheets of adjacent sheet metal stacks that are conductively connected to one another act like a full sheet in terms of eddy current losses, whose strength is twice the strength of the usual, mutually insulated sheets of the Stack amounts. This results in these
ao Endblechpaaren ein Wirbelstromverlust, der
auf die Gewichtseinheit bezogen das Vierfache des in den übrigen einfachen Blechen
auftretenden Wirbelstromverlustes beträgt.
Maschinen, bei denen eine hohe spezifische Leistung erzielt werden soll, es also auf die
weitgehendste Vermeidung von Verlusten ankommt, ist der Eisenkörper wegen der wirksamen
Kühlung von. einer verhältnismäßig großen Anzahl von Kühlspalten durchsetzt,
so daß die obenerwähnten Verluste gerade bei diesen Maschinen schwer ins Gewicht
fallen.ao end plate pairs an eddy current loss which, based on the unit weight, is four times the eddy current loss occurring in the other simple plates.
Machines where a high specific output is to be achieved, i.e. where the greatest possible avoidance of losses is important, is the iron body because of the effective cooling of. a relatively large number of cooling gaps penetrated, so that the above-mentioned losses are particularly heavy in these machines.
Gemäß der Erfindung werden diese Verluste dadurch beseitigt, daß die an die Abstandsstücke stoßenden beiden Endbleche der Blechstapel voneinander derart elektrisch isoliert sind, daß keine Wirbelströme von dem Endblech des einen Blechstapels in das Endblech des benachbarten Blechstapels übertreten können. Zu diesem Zwecke bestehen entweder die Abstandsstücke selbst aus elektrisch nichtleitendem Stoff, oder aber die metallischen Abstandsstücke sind durch eine isolierende Zwischenschicht von mindestens einem der an das gleiche Abstandsstück stoßenden Endbleche der Blechstapel getrennt. Die üblichen Spannschraubenbolzen können ohne besondere Isolation entweder an dem inneren oder an dem äußeren Umfang des Eisenkörpers durch die Blechstapel hindurchgeführt werden, ohne einen schädlichen Schluß.für die Wirbelströme zwischen den Stapeln zu bilden.According to the invention, these losses are eliminated by the fact that the spacers butting two end plates of the stack of sheets from one another in such a way electrically isolated are that no eddy currents from the end sheet of a stack of sheets into the end sheet of the neighboring stack of sheets. For this purpose either exist the spacers themselves made of electrically non-conductive material, or the metallic ones Spacers are through an insulating interlayer of at least one the end plates abutting the same spacer of the stack of sheets are separated. The usual Clamping screw bolts can either be on the inner or on the outer circumference of the iron body without special insulation be passed through the stack of sheets without a harmful Schluß.für the To form eddy currents between the stacks.
In der Zeichnung ist beispielsweise ein Längsschnitt durch einen Abschnitt eines gemaß der Erfindung zusammengestellten Ständereisens dargestellt.In the drawing, for example, a longitudinal section through a portion of an according to the invention assembled stand iron shown.
α, α sind die einzelnen Blechstapel, zwischen denen die Abstandsstücke b, b1 eingeschaltet sind, um zwischen die Blechstapel den Durchtritt der Luft in der Pfeilrichtung zu gestatten. / sind die in den Eisenkörper gebetteten Leiter. Gemäß der Erfindung bestehen die Abstandsstücke b, b1 entweder aus elektrisch α, α are the individual stacks of sheet metal, between which the spacers b, b 1 are switched on in order to allow the passage of air in the direction of the arrow between the sheet metal stacks. / are the ladder embedded in the iron body. According to the invention, the spacers b, b 1 either consist of electrical
isolierendem Stoffe, oder, falls metallische Abstandsstücke benutzt werden, so sind mindestens an der einen Seite zwischen diesen und den Endblechen der Blechstapel elektrisch isolierende Schichten c eingeschaltet. So z. B. befinden sich beim Abstandsstück b zu beiden Seiten, beim Abstandsstück b1 jedoch nur an der einen Seite desselben isolierende Zwischenschichten c. insulating materials, or, if metallic spacers are used, electrically insulating layers c are switched on at least on one side between these and the end sheets of the sheet metal stack. So z. B. are the spacer b on both sides, but the spacer b 1 but only on one side of the same insulating intermediate layers c.
Spannschraubenbolzen d, die in Achsenrichtung durch den Eisenkörper hindurchgeführt sind, drücken die Blechstapel in bekannter Weise in Achsenrichtung zusammen. Da diese Spannschraubenbolzen entweder nur am äußeren oder nur am inneren Umfang des Eisenkörpers angebracht sind, so wird zwischen den einander gegenüberliegenden Endblechen der Blechstapel durch die. Bolzen d für die Wirbelströme kein Schluß geschaffen.Clamping screw bolts d, which are passed through the iron body in the axial direction, press the stack of sheets together in the axial direction in a known manner. Since these clamping screw bolts are attached either only to the outer or only to the inner circumference of the iron body, the stack of sheets between the opposite end plates is through the. Bolt d created no conclusion for the eddy currents.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB145829D DE539161C (en) | 1929-09-22 | 1929-09-22 | Laminated iron body of electrical machines equipped with air ducts, in which the iron body is divided into individual stacks by means of spacers in order to create radial cooling ducts |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB145829D DE539161C (en) | 1929-09-22 | 1929-09-22 | Laminated iron body of electrical machines equipped with air ducts, in which the iron body is divided into individual stacks by means of spacers in order to create radial cooling ducts |
Publications (1)
Publication Number | Publication Date |
---|---|
DE539161C true DE539161C (en) | 1931-11-23 |
Family
ID=7001118
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEB145829D Expired DE539161C (en) | 1929-09-22 | 1929-09-22 | Laminated iron body of electrical machines equipped with air ducts, in which the iron body is divided into individual stacks by means of spacers in order to create radial cooling ducts |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE539161C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1088603B (en) * | 1959-04-06 | 1960-09-08 | Zd Y V I Plzen Narodni Podnik | Press and stiffening plates on pronounced pole poles with slotted sheets in dynamo machines with self-excitation |
EP0039049A1 (en) * | 1980-04-30 | 1981-11-04 | ALSTHOM-ATLANTIQUE Société anonyme dite: | Spacer for stator cooling channels of a dynamoelectric power machine |
-
1929
- 1929-09-22 DE DEB145829D patent/DE539161C/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1088603B (en) * | 1959-04-06 | 1960-09-08 | Zd Y V I Plzen Narodni Podnik | Press and stiffening plates on pronounced pole poles with slotted sheets in dynamo machines with self-excitation |
EP0039049A1 (en) * | 1980-04-30 | 1981-11-04 | ALSTHOM-ATLANTIQUE Société anonyme dite: | Spacer for stator cooling channels of a dynamoelectric power machine |
FR2481853A1 (en) * | 1980-04-30 | 1981-11-06 | Alsthom Atlantique | STATORIC EVENT DISTANCE DEVICE FOR POWER DYNAMOELECTRIC MACHINE |
US4362960A (en) * | 1980-04-30 | 1982-12-07 | Societe Anonyme Dite: Alsthom-Atlantique | Spacer assembly for a stator venting duct of an electric power machine |
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