US1742985A - Transformer - Google Patents
Transformer Download PDFInfo
- Publication number
- US1742985A US1742985A US364484A US36448429A US1742985A US 1742985 A US1742985 A US 1742985A US 364484 A US364484 A US 364484A US 36448429 A US36448429 A US 36448429A US 1742985 A US1742985 A US 1742985A
- Authority
- US
- United States
- Prior art keywords
- coils
- core
- winding
- transformer
- leg
- 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 - Lifetime
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2876—Cooling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S174/00—Electricity: conductors and insulators
- Y10S174/13—High voltage cable, e.g. above 10kv, corona prevention
- Y10S174/14—High voltage cable, e.g. above 10kv, corona prevention having a particular cable application, e.g. winding
- Y10S174/24—High voltage cable, e.g. above 10kv, corona prevention having a particular cable application, e.g. winding in an inductive device, e.g. reactor, electromagnet
- Y10S174/25—Transformer
Definitions
- a shell type transformer has a magnetic core with three legs, the center leg being surrounded by the windings.
- the windings are formed of fiat coils which are supported in spaced relation so that a cooling medium such as air or oil may flow through the spaces between the coils and past the winding leg from one side of the transformer to the other.
- the winding leg of the core forms an obstruction to the flow of the cooling medium and shields a region behind it where it has been found that portions of the winding coils and adjacent por tions of the winding leg itself sometimes be come overheated.
- the general object of the present invention is to provide an improved arrangement and construction of coil spacers which will convey or direct some of the cooling medium into the region behind the winding leg of the core and so avoid overheating of the coils and winding leg in and adjacent to this region.
- Fig. 1 is a sectional view of a shell type air blast transformer with winding coil spacers constructed and arranged in accordance with the invention, the view being taken on the line 1'1 of Fig. 2;
- Fig. 2 is a sectional view on the line 2-2 of Fig. 1;
- Fig. 3 is a view, reduced in size, of one of the winding coil spacers with one of its sides or faces removed to show the interior arrangement.
- this particular transformer being of the usual air blast type and having a horizontal magnetic core with a central winding leg and two outer legs 11 and 12.
- the winding leg 10 is surrounded by two groups of spaced low voltage winding coils 13 and an interposed group of spaced high voltage winding coils 14.
- the core with the winding coils is mounted horizontally on a hollow base 15 and a hollow cap 16 is mounted on the core 1929.
- Air may be forced into the base 15 in any manner desired as by a suitable fan or blower. This air flows upwardly through the spaces between the coils 13 and 14 absorbing heat from these coils and from the winding leg 10 of the core, the heated air finally passing out and escaping through openings in the top of the cap 16.
- Spacers 17 constructed and arranged in accordance with the invention surround the winding leg 10 in the spaces between certain of the coils 13 and 14. As shown in Fig. 2, the spacers 1'? are provided only in the spaces between the high and low voltage groups of coils and at the outer end of each of the low voltage groups. Additional spacers of any suitable construction desired may be provided between the coils of each group and, for the sake of clearness in the drawing, are not shown.
- Each spacer 17 has two sides or faces 18 and 19 formed of sheet insulating material such as pressboard, each having an opening for the windin leg 10 of the core.
- the sides 18 and 19 are spaced apart by spacing strips 20 of insulatin material inter aosed between them at their inner and outer edges and at such other points as may be necessary to main tam the proper spacing against the pressure of the adjacent winding coils.
- the sides 18 and 19 of the spacers 17 are cut away to provide small openings 21 between the interiors of the spacers l7 and the adjacent winding coils just above the winding leg 10.
- the hollow spacers 17 thus provide passages or ducts which will direct cooling currents of air from the base 15 at one side of thetransformer core to the upper surface of th winding leg 10 and to the adjacent parts of the winding coils 13 and 14 at the other side of the transformer core.
- the inner edges of the winding coils 13 and M may be spaced slightly from the winding leg 10 as shown in Fig. 2 so that air from the openings 21 in the spacers 17 may reach all the coils. It will be understood, of course that only part of the air supplied to the base 15 will flow through the hollow spacers 17 and that a considerable part of it will flow up past'the winding leg 10 and through all the spaces between the coils 13 and 14.
- the capacity of atransformer is limited generally, not by its average maximum tem perature, but by the highest temperature in any part of it.
- the invention provides an arrangement which effectively prevents excessive temperatures in parts of the transformer which would otherwise be shielded from the cooling medium by the winding leg of the core and which would therefore be more highly heated than other parts of the transformer, thus securing a more uniform heating of the entire transformer.
- a shell type transformer having a three legged magnetic core, disc winding coils surrounding the central core leg, and a hollow insulating spacer between two of said coils,
- said spacer having an opening at one side of the core to recelve a coohng medium and a second opening adjacent the inner edge of one of said coils at the other side of the core.
- a shell type transformer having a three legged magnetic core spaced disc winding coils surrounding the central core leg, and hollow insulating spacers surrounding said winding leg in the spaces between said coils, said spacers having openings at one side of the core to receive a cooling medium and openings adjacent the inner edges of said coils at the other side of the core.
Description
Jan. 7, 1930. L. H. BURNHAM TRANSFORMER Filed May 20, 1929 Inventor-Y Loc ke HBuPn ham, by I 00% His AttOTney.
Patented Jan. 7, 1930 UNITED STATES PATENT OFFICE LOCKE H. BURNHAM, OF PITTSFIELD, MASSACHUSETTS, ASSIGNOR TO GENERAL ELEC- TRIO COMPANY, A CORPORATION OF NEW YORK TRANSFORMER Application filed May 20,
My invention relates to transformers. A shell type transformer has a magnetic core with three legs, the center leg being surrounded by the windings. In many transformers of this type, the windings are formed of fiat coils which are supported in spaced relation so that a cooling medium such as air or oil may flow through the spaces between the coils and past the winding leg from one side of the transformer to the other. The winding leg of the core forms an obstruction to the flow of the cooling medium and shields a region behind it where it has been found that portions of the winding coils and adjacent por tions of the winding leg itself sometimes be come overheated. The general object of the present invention is to provide an improved arrangement and construction of coil spacers which will convey or direct some of the cooling medium into the region behind the winding leg of the core and so avoid overheating of the coils and winding leg in and adjacent to this region.
The invention will be better understood from the following description taken in con nection with the accompanying drawing in which Fig. 1 is a sectional view of a shell type air blast transformer with winding coil spacers constructed and arranged in accordance with the invention, the view being taken on the line 1'1 of Fig. 2; Fig. 2 is a sectional view on the line 2-2 of Fig. 1; and Fig. 3 is a view, reduced in size, of one of the winding coil spacers with one of its sides or faces removed to show the interior arrangement.
Like reference characters indicate similar parts in the different figures of the drawing.
The invention will be explained in connection with the transformer shown in the drawing, this particular transformer being of the usual air blast type and having a horizontal magnetic core with a central winding leg and two outer legs 11 and 12. The winding leg 10 is surrounded by two groups of spaced low voltage winding coils 13 and an interposed group of spaced high voltage winding coils 14. The core with the winding coils is mounted horizontally on a hollow base 15 and a hollow cap 16 is mounted on the core 1929. Serial No. 364,484.
and encloses the upper portions of the coils 18 and 14 which project above the core. Air may be forced into the base 15 in any manner desired as by a suitable fan or blower. This air flows upwardly through the spaces between the coils 13 and 14 absorbing heat from these coils and from the winding leg 10 of the core, the heated air finally passing out and escaping through openings in the top of the cap 16.
Each spacer 17 has two sides or faces 18 and 19 formed of sheet insulating material such as pressboard, each having an opening for the windin leg 10 of the core. The sides 18 and 19 are spaced apart by spacing strips 20 of insulatin material inter aosed between them at their inner and outer edges and at such other points as may be necessary to main tam the proper spacing against the pressure of the adjacent winding coils. These spacing strips 20seal the space between the sides 18 and 19 except at the lower outer edge at one side of the core and at the upper inner edge just above or behind the winding leg 10 at the other side of the core. The sides 18 and 19 of the spacers 17 are cut away to provide small openings 21 between the interiors of the spacers l7 and the adjacent winding coils just above the winding leg 10. The hollow spacers 17 thus provide passages or ducts which will direct cooling currents of air from the base 15 at one side of thetransformer core to the upper surface of th winding leg 10 and to the adjacent parts of the winding coils 13 and 14 at the other side of the transformer core. The inner edges of the winding coils 13 and M may be spaced slightly from the winding leg 10 as shown in Fig. 2 so that air from the openings 21 in the spacers 17 may reach all the coils. It will be understood, of course that only part of the air supplied to the base 15 will flow through the hollow spacers 17 and that a considerable part of it will flow up past'the winding leg 10 and through all the spaces between the coils 13 and 14.
The capacity of atransformer is limited generally, not by its average maximum tem perature, but by the highest temperature in any part of it. The invention provides an arrangement which effectively prevents excessive temperatures in parts of the transformer which would otherwise be shielded from the cooling medium by the winding leg of the core and which would therefore be more highly heated than other parts of the transformer, thus securing a more uniform heating of the entire transformer.
The invention has been explained by describing and illustrating a particular embodiment thereof but it will be apparent that various changes'maybe made without departing from the spirit and scope of the invention as covered by the appended claims.
lVhat I claim as new and desire to secure by Letters Patent of the United States is:
1. A shell type transformer having a three legged magnetic core, disc winding coils surrounding the central core leg, and a hollow insulating spacer between two of said coils,
said spacer having an opening at one side of the core to recelve a coohng medium and a second opening adjacent the inner edge of one of said coils at the other side of the core.
2. A shell type transformer having a three legged magnetic core spaced disc winding coils surrounding the central core leg, and hollow insulating spacers surrounding said winding leg in the spaces between said coils, said spacers having openings at one side of the core to receive a cooling medium and openings adjacent the inner edges of said coils at the other side of the core. 7
In'witness whereof, I have hereunto set my hand this 17th day of May, 1929.
LOCKE H. BURNHAM.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US364484A US1742985A (en) | 1929-05-20 | 1929-05-20 | Transformer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US364484A US1742985A (en) | 1929-05-20 | 1929-05-20 | Transformer |
Publications (1)
Publication Number | Publication Date |
---|---|
US1742985A true US1742985A (en) | 1930-01-07 |
Family
ID=23434723
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US364484A Expired - Lifetime US1742985A (en) | 1929-05-20 | 1929-05-20 | Transformer |
Country Status (1)
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Cited By (35)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3539959A (en) * | 1968-05-17 | 1970-11-10 | Gulf General Atomic Inc | Transformer having sandwiched coils and cooling means |
WO1990008390A1 (en) * | 1989-01-13 | 1990-07-26 | Sundstrand Corporation | Inductor transformer cooling apparatus |
US5463303A (en) * | 1993-11-02 | 1995-10-31 | Hughes Aircraft Company | Multilayer separate windings of inductive charge coupler for automobile battery charging transformer |
WO1998034239A1 (en) * | 1997-02-03 | 1998-08-06 | Asea Brown Boveri Ab | Horizontal air-cooling in a transformer |
US6261437B1 (en) | 1996-11-04 | 2001-07-17 | Asea Brown Boveri Ab | Anode, process for anodizing, anodized wire and electric device comprising such anodized wire |
US6279850B1 (en) | 1996-11-04 | 2001-08-28 | Abb Ab | Cable forerunner |
US6357688B1 (en) | 1997-02-03 | 2002-03-19 | Abb Ab | Coiling device |
US6369470B1 (en) | 1996-11-04 | 2002-04-09 | Abb Ab | Axial cooling of a rotor |
US6376775B1 (en) | 1996-05-29 | 2002-04-23 | Abb Ab | Conductor for high-voltage windings and a rotating electric machine comprising a winding including the conductor |
US6396187B1 (en) | 1996-11-04 | 2002-05-28 | Asea Brown Boveri Ab | Laminated magnetic core for electric machines |
US6417456B1 (en) | 1996-05-29 | 2002-07-09 | Abb Ab | Insulated conductor for high-voltage windings and a method of manufacturing the same |
US6429563B1 (en) | 1997-02-03 | 2002-08-06 | Abb Ab | Mounting device for rotating electric machines |
US6439497B1 (en) | 1997-02-03 | 2002-08-27 | Abb Ab | Method and device for mounting a winding |
US6465979B1 (en) | 1997-02-03 | 2002-10-15 | Abb Ab | Series compensation of electric alternating current machines |
US6525504B1 (en) | 1997-11-28 | 2003-02-25 | Abb Ab | Method and device for controlling the magnetic flux in a rotating high voltage electric alternating current machine |
US6525265B1 (en) | 1997-11-28 | 2003-02-25 | Asea Brown Boveri Ab | High voltage power cable termination |
US6577487B2 (en) | 1996-05-29 | 2003-06-10 | Asea Brown Boveri Ab | Reduction of harmonics in AC machines |
US20030164245A1 (en) * | 2000-04-28 | 2003-09-04 | Claes Areskoug | Stationary induction machine and a cable therefor |
US6646363B2 (en) | 1997-02-03 | 2003-11-11 | Abb Ab | Rotating electric machine with coil supports |
US6801421B1 (en) | 1998-09-29 | 2004-10-05 | Abb Ab | Switchable flux control for high power static electromagnetic devices |
US6822363B2 (en) | 1996-05-29 | 2004-11-23 | Abb Ab | Electromagnetic device |
US6825585B1 (en) | 1997-02-03 | 2004-11-30 | Abb Ab | End plate |
US6828701B1 (en) | 1997-02-03 | 2004-12-07 | Asea Brown Boveri Ab | Synchronous machine with power and voltage control |
US6831388B1 (en) | 1996-05-29 | 2004-12-14 | Abb Ab | Synchronous compensator plant |
US6867674B1 (en) | 1997-11-28 | 2005-03-15 | Asea Brown Boveri Ab | Transformer |
US6873080B1 (en) | 1997-09-30 | 2005-03-29 | Abb Ab | Synchronous compensator plant |
US6885273B2 (en) | 2000-03-30 | 2005-04-26 | Abb Ab | Induction devices with distributed air gaps |
US6891303B2 (en) | 1996-05-29 | 2005-05-10 | Abb Ab | High voltage AC machine winding with grounded neutral circuit |
US6970063B1 (en) | 1997-02-03 | 2005-11-29 | Abb Ab | Power transformer/inductor |
US6972505B1 (en) | 1996-05-29 | 2005-12-06 | Abb | Rotating electrical machine having high-voltage stator winding and elongated support devices supporting the winding and method for manufacturing the same |
US6995646B1 (en) | 1997-02-03 | 2006-02-07 | Abb Ab | Transformer with voltage regulating means |
US7019429B1 (en) | 1997-11-27 | 2006-03-28 | Asea Brown Boveri Ab | Method of applying a tube member in a stator slot in a rotating electrical machine |
US7046492B2 (en) | 1997-02-03 | 2006-05-16 | Abb Ab | Power transformer/inductor |
US7061133B1 (en) | 1997-11-28 | 2006-06-13 | Abb Ab | Wind power plant |
US7141908B2 (en) | 2000-03-01 | 2006-11-28 | Abb Ab | Rotating electrical machine |
-
1929
- 1929-05-20 US US364484A patent/US1742985A/en not_active Expired - Lifetime
Cited By (42)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3539959A (en) * | 1968-05-17 | 1970-11-10 | Gulf General Atomic Inc | Transformer having sandwiched coils and cooling means |
WO1990008390A1 (en) * | 1989-01-13 | 1990-07-26 | Sundstrand Corporation | Inductor transformer cooling apparatus |
US4956626A (en) * | 1989-01-13 | 1990-09-11 | Sundstrand Corporation | Inductor transformer cooling apparatus |
US5463303A (en) * | 1993-11-02 | 1995-10-31 | Hughes Aircraft Company | Multilayer separate windings of inductive charge coupler for automobile battery charging transformer |
US6906447B2 (en) | 1996-05-29 | 2005-06-14 | Abb Ab | Rotating asynchronous converter and a generator device |
US6940380B1 (en) | 1996-05-29 | 2005-09-06 | Abb Ab | Transformer/reactor |
US6936947B1 (en) | 1996-05-29 | 2005-08-30 | Abb Ab | Turbo generator plant with a high voltage electric generator |
US6919664B2 (en) | 1996-05-29 | 2005-07-19 | Abb Ab | High voltage plants with electric motors |
US6577487B2 (en) | 1996-05-29 | 2003-06-10 | Asea Brown Boveri Ab | Reduction of harmonics in AC machines |
US6376775B1 (en) | 1996-05-29 | 2002-04-23 | Abb Ab | Conductor for high-voltage windings and a rotating electric machine comprising a winding including the conductor |
US6972505B1 (en) | 1996-05-29 | 2005-12-06 | Abb | Rotating electrical machine having high-voltage stator winding and elongated support devices supporting the winding and method for manufacturing the same |
US6417456B1 (en) | 1996-05-29 | 2002-07-09 | Abb Ab | Insulated conductor for high-voltage windings and a method of manufacturing the same |
US6894416B1 (en) | 1996-05-29 | 2005-05-17 | Abb Ab | Hydro-generator plant |
US6891303B2 (en) | 1996-05-29 | 2005-05-10 | Abb Ab | High voltage AC machine winding with grounded neutral circuit |
US6831388B1 (en) | 1996-05-29 | 2004-12-14 | Abb Ab | Synchronous compensator plant |
US6822363B2 (en) | 1996-05-29 | 2004-11-23 | Abb Ab | Electromagnetic device |
US6396187B1 (en) | 1996-11-04 | 2002-05-28 | Asea Brown Boveri Ab | Laminated magnetic core for electric machines |
US6369470B1 (en) | 1996-11-04 | 2002-04-09 | Abb Ab | Axial cooling of a rotor |
US6261437B1 (en) | 1996-11-04 | 2001-07-17 | Asea Brown Boveri Ab | Anode, process for anodizing, anodized wire and electric device comprising such anodized wire |
US6279850B1 (en) | 1996-11-04 | 2001-08-28 | Abb Ab | Cable forerunner |
US6429563B1 (en) | 1997-02-03 | 2002-08-06 | Abb Ab | Mounting device for rotating electric machines |
US6995646B1 (en) | 1997-02-03 | 2006-02-07 | Abb Ab | Transformer with voltage regulating means |
US6825585B1 (en) | 1997-02-03 | 2004-11-30 | Abb Ab | End plate |
US6828701B1 (en) | 1997-02-03 | 2004-12-07 | Asea Brown Boveri Ab | Synchronous machine with power and voltage control |
US6465979B1 (en) | 1997-02-03 | 2002-10-15 | Abb Ab | Series compensation of electric alternating current machines |
US7046492B2 (en) | 1997-02-03 | 2006-05-16 | Abb Ab | Power transformer/inductor |
WO1998034239A1 (en) * | 1997-02-03 | 1998-08-06 | Asea Brown Boveri Ab | Horizontal air-cooling in a transformer |
US6970063B1 (en) | 1997-02-03 | 2005-11-29 | Abb Ab | Power transformer/inductor |
US6439497B1 (en) | 1997-02-03 | 2002-08-27 | Abb Ab | Method and device for mounting a winding |
US6646363B2 (en) | 1997-02-03 | 2003-11-11 | Abb Ab | Rotating electric machine with coil supports |
US6357688B1 (en) | 1997-02-03 | 2002-03-19 | Abb Ab | Coiling device |
US6873080B1 (en) | 1997-09-30 | 2005-03-29 | Abb Ab | Synchronous compensator plant |
US7019429B1 (en) | 1997-11-27 | 2006-03-28 | Asea Brown Boveri Ab | Method of applying a tube member in a stator slot in a rotating electrical machine |
US6525265B1 (en) | 1997-11-28 | 2003-02-25 | Asea Brown Boveri Ab | High voltage power cable termination |
US6525504B1 (en) | 1997-11-28 | 2003-02-25 | Abb Ab | Method and device for controlling the magnetic flux in a rotating high voltage electric alternating current machine |
US6867674B1 (en) | 1997-11-28 | 2005-03-15 | Asea Brown Boveri Ab | Transformer |
US7061133B1 (en) | 1997-11-28 | 2006-06-13 | Abb Ab | Wind power plant |
US6801421B1 (en) | 1998-09-29 | 2004-10-05 | Abb Ab | Switchable flux control for high power static electromagnetic devices |
US7141908B2 (en) | 2000-03-01 | 2006-11-28 | Abb Ab | Rotating electrical machine |
US6885273B2 (en) | 2000-03-30 | 2005-04-26 | Abb Ab | Induction devices with distributed air gaps |
US20030164245A1 (en) * | 2000-04-28 | 2003-09-04 | Claes Areskoug | Stationary induction machine and a cable therefor |
US7045704B2 (en) | 2000-04-28 | 2006-05-16 | Abb Ab | Stationary induction machine and a cable therefor |
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