CH357797A - Stator winding for electrical machines - Google Patents
Stator winding for electrical machinesInfo
- Publication number
- CH357797A CH357797A CH357797DA CH357797A CH 357797 A CH357797 A CH 357797A CH 357797D A CH357797D A CH 357797DA CH 357797 A CH357797 A CH 357797A
- Authority
- CH
- Switzerland
- Prior art keywords
- stator winding
- conductors
- order
- cooling channels
- winding according
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/24—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Windings For Motors And Generators (AREA)
Description
Statorwicklung für elektrische Maschinen Um die Zusatzverluste einer Statorwicklung ge ring zu halten, ist es bekannt, Kunststäbe zu verwen den. Die Kühlung kann hierbei in der Weise erfolgen, dass innerhalb der Nut diese Stäbe voneinander distan ziert und im Zwischenraum Rohre angeordnet wer den, durch die das Kühlmedium strömt. Da zwischen dem Kühlkanal und dem Wicklungskupfer jedoch eine verhältnismässig dicke Isolation besteht, sind die Kühlverhältnisse nicht besonders günstig. Es wurde deshalb auch schon vorgeschlagen, Hohlleiter zu ver wenden, die aber grössere Zusatzverluste und eine schwierige, teure Herstellungsart bedingen.
Bei der erfindungsgemässen Statorwicklung sind zwischen radial übereinander angeordneten Leitern Kühlkanäle vorgesehen, und die Wicklung besteht aus nach jeder Nut zyklisch vertauschten Leitern erster Ordnung, welche innerhalb der Nut ver schränkte Teilleiter zweiter Ordnung aufweisen. Der Erfindungsgegenstand, der eine Kombination an sich bekannter Einzelmerkmale darstellt, ermöglicht eine sehr intensive Wicklungskühlung, ohne dass eine Er höhung der Zusatzverluste in Kauf genommen wer den muss.
Die Zeichnung gibt Ausführungsbeispiele des Er findungsgegenstandes vereinfacht wieder.
In Fig. 1 werden mit 1 die Leiter erster Ordnung bezeichnet, die ausserdem durch Kreuze kenntlich ge macht sind. Diese Leiter von quadratischem oder an genähert quadratischem Querschnitt werden nach jeder Nut (hinsichtlich ihrer Lage innerhalb der Nut) zyklisch miteinander vertauscht und bestehen aus einer Anzahl von Teilleitern zweiter Ordnung 1', wel che in der Nut ein oder mehrere Male um 180 ver dreht sind. Die Kanäle 2 zwischen den Leitern erster Ordnung werden mit Hilfe von Distanzstücken 3 ge bildet, die beispielsweise druckfeste Isolierleisten sein können.
In diesem Falle ist eine unmittelbare Berüh- rung zwischen dem Leiterkupfer und dem Kühlmittel möglich, da man den obersten und untersten Teil leiter 1' eines jeden Leiters erster Ordnung nicht zu isolieren braucht.
In den Fig. 2 und 3, in denen gleiche Teile mit gleichen Bezugszeichen versehen sind wie in Fig. 1, werden die Kühlkanäle 2 durch Metallrohre 4, 4' ge bildet, die sich speziell für Wasserkühlung eignen und gegenüber den Leitern isoliert sind.
Fig. 4 zeigt eine Ausführungsform, bei welcher die Kühlkanäle innerhalb der Leiter erster Ordnung vor gesehen sind. Man erkennt, dass bei diesem Wick lungsaufbau die Anzahl der Kühlkanäle verringert werden kann, da gemäss Fig. 1 bis 3 zu drei Leitern erster Ordnung mindestens vier Kanäle gehören, wäh rend nach Fig. 4 die gleiche Anzahl von Kanälen erst bei vier Leitern vorhanden ist.
Bei der beschriebenen Wicklung ist es vorteilhaft, die Teilleiter ausserhalb der Nut in an sich bekannter Weise um 90 zu verdrehen, um dadurch eine Kom pensation der Stirnverbindungs-EMKe zu erreichen und die Zusatzverluste auch in den Wickelköpfen so klein wie möglich zu halten (schweizerische Patent schrift Nr. 144959).
Stator winding for electrical machines In order to keep the additional losses of a stator winding ge ring, it is known to use synthetic rods. The cooling can take place here in such a way that these rods are spaced apart from one another within the groove and tubes are arranged in the space through which the cooling medium flows. However, since there is relatively thick insulation between the cooling channel and the winding copper, the cooling conditions are not particularly favorable. It has therefore already been proposed to use waveguides, but they cause greater additional losses and a difficult, expensive method of manufacture.
In the case of the stator winding according to the invention, cooling channels are provided between conductors arranged radially one above the other, and the winding consists of first-order conductors which are cyclically interchanged after each slot and which have second-order partial conductors crossed within the slot. The subject of the invention, which is a combination of known individual features, enables very intensive winding cooling without an increase in additional losses having to be accepted.
The drawing shows embodiments of the subject invention He simplified again.
In Fig. 1, 1 denotes the first-order ladder, which is also made recognizable by crosses ge. These conductors of square or approximately square cross-section are cyclically interchanged after each groove (with regard to their position within the groove) and consist of a number of sub-conductors of the second order 1 ', which are rotated one or more times by 180 in the groove . The channels 2 between the first-order conductors are ge forms with the help of spacers 3, which can be pressure-resistant insulating strips, for example.
In this case, direct contact between the copper conductor and the coolant is possible, since the top and bottom part of conductor 1 'of each first-order conductor does not need to be insulated.
In Figs. 2 and 3, in which the same parts are provided with the same reference numerals as in Fig. 1, the cooling channels 2 are formed by metal pipes 4, 4 'ge, which are especially suitable for water cooling and are insulated from the conductors.
Fig. 4 shows an embodiment in which the cooling channels are seen within the first order conductor. It can be seen that with this winding structure, the number of cooling channels can be reduced since, according to FIGS. 1 to 3, at least four channels belong to three first-order conductors, while according to FIG. 4 the same number of channels is only present with four conductors .
With the winding described, it is advantageous to twist the sub-conductors outside the slot in a known manner by 90 in order to compensate for the end connection EMFs and to keep the additional losses as small as possible in the winding heads (Swiss patent document No. 144959).
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH357797T | 1958-03-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH357797A true CH357797A (en) | 1961-10-31 |
Family
ID=4511689
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH357797D CH357797A (en) | 1958-03-01 | 1958-03-01 | Stator winding for electrical machines |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH357797A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10244202A1 (en) * | 2002-09-23 | 2004-03-25 | Alstom (Switzerland) Ltd. | Electrical machine with stator with cooled winding rods, has distancing arrangement for winding rods consisting of axial tubular distance elements whose internal volumes form cooling medium channels |
WO2016023710A1 (en) * | 2014-08-14 | 2016-02-18 | Wobben Properties Gmbh | Synchronous generator, in particular four-pole synchronous ring generator of a gearless wind turbine, and wind turbine having said synchronous generator |
-
1958
- 1958-03-01 CH CH357797D patent/CH357797A/en unknown
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10244202A1 (en) * | 2002-09-23 | 2004-03-25 | Alstom (Switzerland) Ltd. | Electrical machine with stator with cooled winding rods, has distancing arrangement for winding rods consisting of axial tubular distance elements whose internal volumes form cooling medium channels |
WO2016023710A1 (en) * | 2014-08-14 | 2016-02-18 | Wobben Properties Gmbh | Synchronous generator, in particular four-pole synchronous ring generator of a gearless wind turbine, and wind turbine having said synchronous generator |
DE102014216148A1 (en) * | 2014-08-14 | 2016-02-18 | Wobben Properties Gmbh | Synchronous generator, in particular multi-pole synchronous ring generator of a gearless wind turbine, and wind turbine with selbigem |
DE102014216148A8 (en) * | 2014-08-14 | 2016-12-22 | Wobben Properties Gmbh | Synchronous generator, in particular multi-pole synchronous ring generator of a gearless wind turbine, and wind turbine with selbigem |
CN106663977A (en) * | 2014-08-14 | 2017-05-10 | 乌本产权有限公司 | Synchronous generator, in particular four-pole synchronous ring generator of a gearless wind turbine, and wind turbine having said synchronous generator |
US10236737B2 (en) | 2014-08-14 | 2019-03-19 | Wobben Properties Gmbh | Synchronous generator, in particular multipole synchronous annular generator of a direct-drive wind turbine, and wind turbine having the same |
CN106663977B (en) * | 2014-08-14 | 2019-09-03 | 乌本产权有限公司 | The synchronous ring generator of the synchronous generator of the wind energy plant of no transmission device, especially multipole and the wind energy plant with it |
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