ITMI962554A1 - ELECTRIC MACHINE - Google Patents
ELECTRIC MACHINE Download PDFInfo
- Publication number
- ITMI962554A1 ITMI962554A1 IT96MI002554A ITMI962554A ITMI962554A1 IT MI962554 A1 ITMI962554 A1 IT MI962554A1 IT 96MI002554 A IT96MI002554 A IT 96MI002554A IT MI962554 A ITMI962554 A IT MI962554A IT MI962554 A1 ITMI962554 A1 IT MI962554A1
- Authority
- IT
- Italy
- Prior art keywords
- supports
- electric machine
- stator
- screws
- circumference
- Prior art date
Links
- 235000014676 Phragmites communis Nutrition 0.000 claims 1
- 238000004804 winding Methods 0.000 claims 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/15—Mounting arrangements for bearing-shields or end plates
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Frames (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Glass Compositions (AREA)
- Eye Examination Apparatus (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Description
TESTO DELLA DESCRIZIONE TEXT OF THE DESCRIPTION
Stato della tecnica State of the art
L'invenzione si riferisce ad una macchina elettrica secondo il tipo della rivendicazione principale. In una tale macchina elettrica nota dal documento DE-A-2814 062, lo statore - come illustrato schematicamente nelle figg. 1 e 2 - è costituito da singoli lamierini (lamelle o bordini). Essi non sono per questo motivo così rigidi come le parti massicce dello stesso volume. Serrando questi ultimi fra gli scudi di supporto 13 e 14, essi si deformano, a partire dagli appoggi 11, all'atto del serraggio delle viti 12. Non viene ottenuto un risultato differente neanche realizzando l'appoggio estendentesi tutt'intorno. I gusci di supporto 13 e 14 sono cedevoli (alluminio, costruzione con materiali leggeri), per cui anche in questo caso si ottengono degli appoggi solo nella zona dei punti 11. La deformazione si forma all'interno dello statore ed il foro 15 diventa non circolare, come illustrato in modo esagerato nella fig. 1. Ciò comporta una perdita di potenza ed un aumento del rumore. The invention relates to an electric machine according to the type of the main claim. In such an electric machine known from document DE-A-2814 062, the stator - as schematically illustrated in figs. 1 and 2 - consists of single laminations (slats or edges). They are therefore not as rigid as the massive parts of the same volume. By tightening the latter between the support shields 13 and 14, they deform, starting from the supports 11, upon tightening the screws 12. A different result is not obtained even by making the support extending all around. The support shells 13 and 14 are yieldable (aluminum, construction with light materials), so that also in this case supports are obtained only in the area of points 11. The deformation is formed inside the stator and the hole 15 becomes non circular, as illustrated exaggeratedly in FIG. 1. This results in a loss of power and an increase in noise.
Nel caso di generatori compatti secondo il documento DE-A-37 04 157 , si è tentato di arrivare alla soluzione in modo completamente diverso. In questo caso, lo statore viene serrato in corrispondenza di lamelle centrali dal diametro maggiore, il ché però comporta un serraggio più labile. In the case of compact generators according to the document DE-A-37 04 157, an attempt was made to arrive at the solution in a completely different way. In this case, the stator is tightened in correspondence with central blades with a larger diameter, which however involves a more labile tightening.
Vantaggi dell'invenzione Advantages of the invention
La realizzazione secondo l ' invenzione del serraggio dello statore secondo l a parte caratterizzante della rivendicazione principale presenta il vantaggio che vengono ridotte al minimo le conseguenze del serraggio disuniforme che si verifica mediante le viti . The embodiment according to the invention of the clamping of the stator according to the characterizing part of the main claim has the advantage that the consequences of the uneven clamping which occurs by means of the screws are minimized.
La soluzione secondo l ' invenzione è illustrata in modo schematico nella fig. 3. The solution according to the invention is schematically illustrated in fig. 3.
Esempio esecutivo Executive example
Per ogni vite 12 si prevedono due appoggi 11, cioè nel caso di quattro viti si prevedono otto appoggi. Sugli appoggi 11 viene esercitata solo la metà della compressione superficiale ed il doppio numero degli appoggi 11 distribuisce la minore deformazione in modo più uniforme sulla circonferenza. Come dimostrato da esperimenti, il foro 15 dello statore rimane più rotondo - la deformazione ritorna a circa un quarto del valore originario. Prevedendo due appoggi per ogni vite 12, la deformazione che in via di principio non può essere evitata rimane molto più piccola rispetto a finora. A tale scopo, gli appoggi 11 sono distribuiti a distanze uguali sulla circonferenza. Un numero maggiore di appoggi 11 per ogni vite 12 non ha senso, poiché poi la forza delle viti non viene più distribuita in modo uniforme. La distribuzione uniforme della forza delle viti è però una condizione, affinché la deformazione diventi minima. For each screw 12 two supports 11 are provided, that is, in the case of four screws, eight supports are provided. On the supports 11 only half of the surface compression is exerted and the double number of the supports 11 distributes the lesser deformation more uniformly on the circumference. As shown by experiments, the hole 15 of the stator remains rounder - the deformation returns to about a quarter of the original value. By providing two supports for each screw 12, the deformation which in principle cannot be avoided remains much smaller than before. For this purpose, the supports 11 are distributed at equal distances on the circumference. A greater number of supports 11 for each screw 12 does not make sense, since then the force of the screws is no longer distributed evenly. However, the uniform distribution of the force of the screws is a condition for the deformation to become minimal.
Claims (2)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19547610A DE19547610A1 (en) | 1995-12-20 | 1995-12-20 | Electrical machine e.g. compact generator |
Publications (3)
Publication Number | Publication Date |
---|---|
ITMI962554A0 ITMI962554A0 (en) | 1996-12-05 |
ITMI962554A1 true ITMI962554A1 (en) | 1998-06-05 |
IT1302983B1 IT1302983B1 (en) | 2000-10-18 |
Family
ID=7780676
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT1996MI002554A IT1302983B1 (en) | 1995-12-20 | 1996-12-05 | ELECTRIC MACHINE WITH STATIC LAMELLAR PACK WITH PARTICULAR TIGHTENING OF THE STATOR. |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE19547610A1 (en) |
FR (1) | FR2742935B1 (en) |
IT (1) | IT1302983B1 (en) |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2023259A (en) * | 1932-03-17 | 1935-12-03 | Fairbanks Morse & Co | Electric machine |
US2011060A (en) * | 1934-09-24 | 1935-08-13 | Leland Electric Co | Stator |
US2769933A (en) * | 1953-09-04 | 1956-11-06 | Ballman Engineering Company | Stator construction |
US2810847A (en) * | 1956-06-08 | 1957-10-22 | Redmond Company Inc | Electric motor field construction |
DE1890276U (en) * | 1963-02-05 | 1964-04-02 | Siemens Ag | STAND PLATE PACKAGE FOR ELECTRIC MACHINES. |
DE3704157C2 (en) * | 1986-03-15 | 1996-10-02 | Bosch Gmbh Robert | Device for reducing the noise of electrical machines |
-
1995
- 1995-12-20 DE DE19547610A patent/DE19547610A1/en not_active Withdrawn
-
1996
- 1996-12-05 IT IT1996MI002554A patent/IT1302983B1/en active IP Right Grant
- 1996-12-17 FR FR9615502A patent/FR2742935B1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
FR2742935A1 (en) | 1997-06-27 |
DE19547610A1 (en) | 1997-06-26 |
FR2742935B1 (en) | 1998-08-28 |
ITMI962554A0 (en) | 1996-12-05 |
IT1302983B1 (en) | 2000-10-18 |
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Legal Events
Date | Code | Title | Description |
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0001 | Granted |