WO2013044510A1 - Method of assembling electric transformer - Google Patents
Method of assembling electric transformer Download PDFInfo
- Publication number
- WO2013044510A1 WO2013044510A1 PCT/CN2011/080473 CN2011080473W WO2013044510A1 WO 2013044510 A1 WO2013044510 A1 WO 2013044510A1 CN 2011080473 W CN2011080473 W CN 2011080473W WO 2013044510 A1 WO2013044510 A1 WO 2013044510A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- coil
- press
- drying
- electromagnetic component
- pressure
- Prior art date
Links
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
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
Definitions
- the invention relates to a method of assembling an electric transformer. More particularly, the invention relates to a method where coils of the transformer are compressed during the assembly . Background of the invention
- Electric transformers usually comprise at least two coils, namely at least one primary coil for inputting electrical energy and at least one secondary coil for outputting electrical energy.
- the relation between the number of windings of the primary coil and the number of windings of the secondary coil determines the electric characteristics of the transformer.
- transformers may be immersed in transformer oi1 that both cools and insulates the windings of the coils.
- transformer oi1 that both cools and insulates the windings of the coils.
- oil-filled transformers undergo prolonged drying processes to ensure that the transformer is completely free of water vapor before the cooling oil is introduced.
- a method for drying the active part of a transformer is described in German Patent Application DE 195 01 323 Al .
- the transformer is coupled to a vacuum pump, and the windings are supplied with a low frequency heating current that causes the solid insulation within the transformer to have gas or water content removed.
- the coils are usually compressed in order to avoid that the coils might change their size and position under the exposure of high electrical currents .
- An embodiment of the invention relates to a method of assembling an electric transformer, comprising the steps of:
- An advantage of this embodiment is that both drying and compressing may be carried out simultaneously. Therefore the assembling may be carried out very time efficient and
- the exposure of the dried and compressed coil to the ambient atmosphere may be substantially shortened compared to prior art assembly.
- the electromagnetic component may immediately be inserted into a transformer vessel which may be filled with oil or evacuated after the insertion of the electromagnetic component. There is no need to compress the coils outside the oven under ambient atmosphere because the coils have already been compressed during the drying and are ready for final assembly in the transformer vessel.
- the step of combining the electric coil and the transformer core to form the electromagnetic component may comprise the step of mounting the coil on the transformer core or the step of mounting the transformer core on the coil.
- the at least one mechanical element is preferably installed in the drying oven .
- the coil may slightly change its size. This effect may be addressed by using a tunable press.
- the tunable press allows generating a defined mechanical pressure over time even if the coil changes its size over time during the drying process .
- a hydrolic press is used to apply the mechanical pressure.
- the hydraulic press may comprise a pressure cylinder and a control unit that controls the pressure applied to the coil whilst the coil is dried.
- the press is controlled to apply a constant mechanical pressure over time during the step of drying the coil.
- the press is controlled to modify the mechanical pressure over time during the step of drying the coil.
- a predefined pressure profile may be applied during the drying step.
- the predefined pressure profile may address an anticipated change of size of the coil during the drying step.
- the pressure that is applied by the press is preferably monitored . This allows controlling the press to maintain the pressure on a predefined level or to provide a given pressure profile over time .
- the size of the coil may be measured whilst the mechanical pressure is applied by the press and the coil is dried. This allows adapting the pressure on the coil to achieve a predefined coil size after completing the drying step.
- the step of drying the electromagnetic component may be - at least temporarily - carried out in a kerosene containing gas or in vacuum.
- at least those parts of the press, which are in contact with the coil, are preferably kerosene-resistant and/or vacuum-resistant.
- the mechanical elements for ensuring that the mechanical pressure previously provided by the press is steadily maintained may comprise pull rods and/or wedges.
- the step of forming the electromagnetic component preferably includes providing a closed magnetic circuit in the
- Figures 1-7 show a first exemplary embodiment of a method according to the present invention
- Figure 8 illustrates a first modification of the method as shown in Figures 1-7 in an exemplary fashion
- Figure 9 illustrates a second modification of the method as shown in Figures 1-7 in an exemplary fashion.
- Figures 10-11 illustrate a third modification of the method as shown in Figures 1-7 in an exemplary fashion. Detailed description of the preferred embodiment
- Figure 1 shows in an exemplary fashion an E-shaped transformer core 10.
- the shape of the transformer core may vary in a wide range .
- the shape shown in Figure 1 has been chosen for illustrating purposes , only, and may be replaced by any other core shape.
- the core shape might be chosen differently to accommodate the required number of coils.
- a coil 20 is mounted such that the middle section 11 of the transformer core penetrates the coil 20 (see Figure 2) .
- the coil 20 may comprise primary and secondary windings which are not shown in further detail .
- the E-shaped transformer core 10 is provided with an I-shaped core element 30 which is placed on top of the E-shaped transformer core 10 (see Figure 3) . If electric current flows through the windings of coil 20, a magnetic flux will be generated as schematically indicated by reference sign 40.
- the original size of the coil 20 before the compressing is indicated by reference sign H.
- the resulting electromagnetic component 50 which comprises the E-shaped transformer core 10, the I-shaped transformer element 30, and the coil 20, is then subjected to a drying step.
- the drying step is preferably combined with a step of compressing the coil 20 such that both steps are carried out simultaneously.
- a tunable press 60 is attached to the coil 20.
- the press 60 is preferably a hydraulic press which comprises a pressure cylinder 61 and a control unit 62.
- the control unit 62 controls the pressure applied by the pressure cylinder 61 and therefore regulates the extent to which the coil 20 is compressed.
- the size of the compressed coil 20 is designated by reference sign h (h ⁇ H) in Figure 4.
- the electromagnetic component 50 is moved into a drying oven 70 as shown in Figure 5.
- the entire press 60 may be moved into the drying oven 70 as shown in Figure 5.
- FIG. 8 shows alternative embodiments.
- the pressure cylinder 61 and pressure rods 63 are placed inside the drying oven 70 whereas the control unit 62 is placed outside.
- electromagnetic component 50 into the drying oven 70 may be opposite.
- the electromagnetic component 50 may be moved into the drying oven 70 before the hydraulic press 60 in its entirety or parts thereof (for instance the pressure rods 63 and/or the pressure cylinder 61), are mounted on the coil 20.
- mechanical elements 80 are attached to the coil 20. These mechanical elements 80 prevent the coil 20 from increasing its size if and when the hydraulic press 20 is detached from the coil 20. In other words, the mechanical elements 80 ensure that the mechanical pressure previously provided by the hydraulic press 60 is maintained without interruption.
- the mechanical elements 80 may be attached in the drying oven 70 or outside thereof, depending on where the press 60 or its parts are removed.
- Figures 6 and 7 illustrate the removal of the press 60 or its parts outside the drying oven 70.
- the assembled transformer is designated by reference numeral 100.
- FIGS 10 and 11 illustrate the removal of the press 60 or its parts inside the drying oven 70.
- the mechanical elements 80 are attached to the electromagnetic component 50 before the press is detached.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CN2011/080473 WO2013044510A1 (en) | 2011-09-30 | 2011-09-30 | Method of assembling electric transformer |
BR112014007475A BR112014007475B8 (en) | 2011-09-30 | 2011-09-30 | ELECTRIC TRANSFORMER ASSEMBLY METHOD |
CN201180073730.9A CN103843085B (en) | 2011-09-30 | 2011-09-30 | The method of assembling piezoelectric transformer |
KR1020147007904A KR20140054361A (en) | 2011-09-30 | 2011-09-30 | Method of assembling electric transformer |
EP11872901.1A EP2745299B1 (en) | 2011-09-30 | 2011-09-30 | Method of assembling electric transformer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CN2011/080473 WO2013044510A1 (en) | 2011-09-30 | 2011-09-30 | Method of assembling electric transformer |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013044510A1 true WO2013044510A1 (en) | 2013-04-04 |
Family
ID=47994174
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2011/080473 WO2013044510A1 (en) | 2011-09-30 | 2011-09-30 | Method of assembling electric transformer |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2745299B1 (en) |
KR (1) | KR20140054361A (en) |
CN (1) | CN103843085B (en) |
BR (1) | BR112014007475B8 (en) |
WO (1) | WO2013044510A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114823120A (en) * | 2022-03-28 | 2022-07-29 | 保定天威保变电气股份有限公司 | Assembling method for under-pressure iron insertion of transformer |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102488130B1 (en) * | 2021-08-19 | 2023-01-12 | (주)티에스이 | Assembling Automation System of Reactor and manufacturing method using the same |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3792528A (en) * | 1971-05-19 | 1974-02-19 | Bbc Brown Boveri & Cie | Process of for manufacturing electrical apparatus such as casing-enclosed transformers and reactors |
CN1516206A (en) * | 2003-08-25 | 2004-07-28 | 广州特种变压器厂有限公司 | Resin-poured insulation dry transformer and its production method |
CN1750191A (en) * | 2004-09-15 | 2006-03-22 | 特变电工股份有限公司 | Compressing method for transformer body |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3557846A (en) * | 1968-11-07 | 1971-01-26 | Checheljuk Yakov Z | Apparatus for axial compression of windings |
DE2128991A1 (en) * | 1971-06-11 | 1973-01-04 | Schorch Gmbh | PRESSING DEVICE FOR TRANSFORMER WINDINGS ODGL |
KR100699542B1 (en) * | 2006-07-31 | 2007-03-23 | 신성공업주식회사 | Device for manufacturing of transformer |
CN101325120A (en) * | 2007-06-15 | 2008-12-17 | 台达电子工业股份有限公司 | Transformer and method for winding coil thereof |
CN101145441A (en) * | 2007-07-27 | 2008-03-19 | 中电电气集团有限公司 | Amorphous alloy transformer assembly method |
CN102007554B (en) * | 2009-02-25 | 2012-11-07 | 松下电器产业株式会社 | Transformer and transformer assembly method |
EP2530686B1 (en) * | 2011-06-01 | 2014-08-06 | ABB Research Ltd. | Pressing of transformer windings during active part drying |
-
2011
- 2011-09-30 KR KR1020147007904A patent/KR20140054361A/en active Search and Examination
- 2011-09-30 WO PCT/CN2011/080473 patent/WO2013044510A1/en active Application Filing
- 2011-09-30 CN CN201180073730.9A patent/CN103843085B/en active Active
- 2011-09-30 EP EP11872901.1A patent/EP2745299B1/en active Active
- 2011-09-30 BR BR112014007475A patent/BR112014007475B8/en active IP Right Grant
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3792528A (en) * | 1971-05-19 | 1974-02-19 | Bbc Brown Boveri & Cie | Process of for manufacturing electrical apparatus such as casing-enclosed transformers and reactors |
CN1516206A (en) * | 2003-08-25 | 2004-07-28 | 广州特种变压器厂有限公司 | Resin-poured insulation dry transformer and its production method |
CN1750191A (en) * | 2004-09-15 | 2006-03-22 | 特变电工股份有限公司 | Compressing method for transformer body |
Non-Patent Citations (1)
Title |
---|
See also references of EP2745299A4 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114823120A (en) * | 2022-03-28 | 2022-07-29 | 保定天威保变电气股份有限公司 | Assembling method for under-pressure iron insertion of transformer |
Also Published As
Publication number | Publication date |
---|---|
BR112014007475B8 (en) | 2023-04-25 |
EP2745299A4 (en) | 2015-06-24 |
CN103843085B (en) | 2016-06-08 |
BR112014007475B1 (en) | 2020-04-28 |
EP2745299A1 (en) | 2014-06-25 |
EP2745299B1 (en) | 2018-12-26 |
KR20140054361A (en) | 2014-05-08 |
BR112014007475A2 (en) | 2017-04-04 |
CN103843085A (en) | 2014-06-04 |
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