EP0406555B1 - Shared shunt reactor type transformer - Google Patents
Shared shunt reactor type transformer Download PDFInfo
- Publication number
- EP0406555B1 EP0406555B1 EP90109760A EP90109760A EP0406555B1 EP 0406555 B1 EP0406555 B1 EP 0406555B1 EP 90109760 A EP90109760 A EP 90109760A EP 90109760 A EP90109760 A EP 90109760A EP 0406555 B1 EP0406555 B1 EP 0406555B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- transformer
- shunt reactor
- yoke
- type
- shared
- 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
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/38—Auxiliary core members; Auxiliary coils or windings
- H01F27/385—Auxiliary core members; Auxiliary coils or windings for reducing harmonics
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F30/00—Fixed transformers not covered by group H01F19/00
- H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
- H01F30/10—Single-phase transformers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F30/00—Fixed transformers not covered by group H01F19/00
- H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
- H01F30/12—Two-phase, three-phase or polyphase transformers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F37/00—Fixed inductances not covered by group H01F17/00
Definitions
- This invention relates to a shared shunt reactor type transformer used in a power transmission or distribution system.
- FIGURE 1 There is known a shared shunt reactor type three-phase transformer, as disclosed in Japanese Patent Application laid open under No. 30112/1985. Its construction is schematically shown in FIGURE 1. It comprises a transformer 1, a shunt reactor 2, and a tank 3 in which the transformer and the shunt reactor are installed.
- the transformer 1 has a limb core 1 a , an upper and a lower yoke 1 b and 1 c and a coil 1 d .
- the excitation of the transformer 1 causes main magnetic flux to pass as shown at 1 e .
- the shunt reactor 2 has an upper yoke 2 b a gap core 2 a , and a coil 2 d .
- the excitation of the reactor 2 causes magnetic flux to pass as shown at 2 e .
- the coils 1 d and 2 d are so wound respectively that the main magnetic flux passing through the limb core 1 a of the transformer 1 may be of the same polarity as that passing through the gap core 2 a of
- FIGURE 2 shows a case that a transformer 1 and a shunt reactor 2 are separate from each other.
- the transformer 1 is installed in a tank 4, and the shunt reactor 2 in another tank 5.
- the reactor 2 includes a lower yoke 2 c .
- the transformer 1 and the reactor 2 are otherwise of the same construction as those which have been described with reference to FIGURE 1. If the reactor 2 is connected to the top of the transformer 1 in a common tank 3 so that the upper yoke 1 b of the transformer 1 may serve as the lower yoke 2 c of the reactor 2, too, a shared shunt reactor type transformer as shown in FIGURE 1 is obtained.
- the modes in which magnetic flux passes through the upper yoke 1 b of the transformer 1 consist of three cases, i.e.:
- FIGURE 1 exhibits the same performance as the separate type shown in FIGURE 2, and yet calls for a smaller space for installation, if the upper yoke 1 b of the transformer 1 has so large a cross-sectional area that it may not be magnetically saturated in any of the three cases.
- FIGURE 3 showing a shared shunt reactor type transformer of a single-phase shell-type.
- the transformer 1 has a limb core 1 a , a yoke 1 c , and a coil 1 d .
- the yoke 1 c has a diminished yoke X and a bypass yoke Y.
- the apparatus also includes a shunt reactor 2.
- the reactor 2 has a gap core 2 a , and a coil 2 d which is surrounded by the diminished yoke X of the transformer 1 and the bypass yoke Y.
- the diminished yoke X and the bypass yoke Y form a yoke for the reactor 2, too.
- the excitation of the transformer 1 causes a main magnetic flux to pass as shown at 1 e
- the excitation of the shunt reactor 2 causes magnetic flux to pass as shown at 2 e
- the coils 1 d and 2 d are wound in such a way that the magnetic flux 1 e and 2 e passing through the diminished yoke X may cancel each other.
- FIGURE 4 showing a case that a shell type transformer 1 and a shell type shunt reactor 2 are so positioned that the respective yokes 1 c and 2 b thereof may stay apart from each other, but in a mutually closely adjacent relation.
- the main magnetic flux 1 e and the magnetic flux 2 e are designed for passing in opposite directions through the yoke 1 c of the transformer 1 and the yoke 2 b of the reactor 2, respectively.
- the apparatus shown in FIGURE 3 is obtained if the transformer 1 and the shunt reactor 2 which are shown in FIGURE 4 are so combined that the yoke 1 c of the transformer 1 may serve as the yoke 2 b of the reactor 2, too.
- the magnetic fluxes 1 e and 2 e pass in the opposite directions, they cancel each other when passing through the diminished yoke X in the apparatus shown in FIGURE 3. It is, therefore, sufficient for the diminished yoke X to have a cross-sectional area which allows for the passage of the amount of magnetic flux equal to the difference between 1 e and 2 e , and which is smaller than the original cross-sectional area of the yoke 1 c .
- FIGURE 5 showing the magnetic flux distribution which occurs when only the transformer 1 is excited.
- the main magnetic flux of the transformer 1 is distributed through the diminished yoke X and the bypass yoke Y. Therefore, it is sufficient for the diminished yoke X and the bypass yoke Y to have a sum of cross-sectional areas of yokes X and Y which is equal to the original cross-sectional area of the yoke 1 c .
- the apparatus shown in FIGURE 3 enables a reduction in the cross-sectional area of the yoke of the transformer 1 by an amount equal to the difference between that of 1 c as shown in FIGURE 4 or 5 and that of X, and thereby a smaller space for installation.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Of Transformers For General Uses (AREA)
- Housings And Mounting Of Transformers (AREA)
- Transformers For Measuring Instruments (AREA)
Description
- This invention relates to a shared shunt reactor type transformer used in a power transmission or distribution system.
- There is known a shared shunt reactor type three-phase transformer, as disclosed in Japanese Patent Application laid open under No. 30112/1985. Its construction is schematically shown in FIGURE 1. It comprises a
transformer 1, ashunt reactor 2, and a tank 3 in which the transformer and the shunt reactor are installed. Thetransformer 1 has alimb core 1a, an upper and alower yoke coil 1d. The excitation of thetransformer 1 causes main magnetic flux to pass as shown at 1e. Theshunt reactor 2 has anupper yoke 2b agap core 2a, and acoil 2d. The excitation of thereactor 2 causes magnetic flux to pass as shown at 2e. Thecoils limb core 1a of thetransformer 1 may be of the same polarity as that passing through thegap core 2a of theshunt reactor 2, as shown in FIGURE 1. - FIGURE 2 shows a case that a
transformer 1 and ashunt reactor 2 are separate from each other. Thetransformer 1 is installed in a tank 4, and theshunt reactor 2 inanother tank 5. Thereactor 2 includes alower yoke 2c. Thetransformer 1 and thereactor 2 are otherwise of the same construction as those which have been described with reference to FIGURE 1. If thereactor 2 is connected to the top of thetransformer 1 in a common tank 3 so that theupper yoke 1b of thetransformer 1 may serve as thelower yoke 2c of thereactor 2, too, a shared shunt reactor type transformer as shown in FIGURE 1 is obtained. - Referring again to FIGURE 1, the modes in which magnetic flux passes through the
upper yoke 1b of thetransformer 1 consist of three cases, i.e.: - Case 1 - The main
magnetic flux 1e of the transformer passes if only the transformer is excited; - Case 2 - The
magnetic flux 2e of theshunt reactor 2 passes if only the shunt reactor is excited; and - Case 3 - The magnetic flux passing through it corresponds to the difference between the
magnetic flux - Therefore, the assembly of FIGURE 1 exhibits the same performance as the separate type shown in FIGURE 2, and yet calls for a smaller space for installation, if the
upper yoke 1b of thetransformer 1 has so large a cross-sectional area that it may not be magnetically saturated in any of the three cases. - It is, however, usual that the maximum magnetic flux passes through the
upper yoke 1b of thetransformer 1 inCase 1, as the magnitude of theflux 1e is usually greater than that of theflux 2e. This requires theupper yoke 1b to have the same cross-sectional area as thelower yoke 1c. This requirement has hitherto disabled any desirable reduction in weight of the core of the transformer. - Under these circumstances, it is an object of this invention to provide an improved shared shunt reactor type transformer in which a transformer and a shunt reactor are constructed as a unitary assembly having a reduced transformer core weight.
- This object is essentially attained by the features disclosed in
claim 1. - This arrangement enables a reduction in the cross-sectional area of the yoke of the transformer, and yet the shared shunt reactor type transformer according to this invention is satisfactory for use in any case where the transformer or the shunt reactor is operated alone, or where they are operated together.
- These and other objects, features and advantages of this invention will become more apparent from the following description and the accompanying drawings.
-
- FIGURE 1 is a schematic sectional view of a known shared shunt reactor type transformer;
- FIGURE 2 is a schematic sectional view illustrating the operation of the apparatus shown in FIGURE 1;
- FIGURE 3 is a schematic sectional view of a shared shunt reactor type transformer embodying this invention;
- FIGURES 4 and 5 are views similar to FIGURE 3, but showing the operation of the apparatus shown in FIGURE 3;
- FIGURE 6 is a schematic sectional view of another embodiment of this invention; and
- FIGURE 7 is a schematic sectional view of still another embodiment of this invention.
- A preferred embodiment of this invention will now be described with reference to the drawings which are merely illustrative of this invention and are not intended for limiting the scope thereof.
- Reference is first made to FIGURE 3 showing a shared shunt reactor type transformer of a single-phase shell-type. The
transformer 1 has alimb core 1a, ayoke 1c, and acoil 1d. Theyoke 1c has a diminished yoke X and a bypass yoke Y. The apparatus also includes ashunt reactor 2. Thereactor 2 has agap core 2a, and acoil 2d which is surrounded by the diminished yoke X of thetransformer 1 and the bypass yoke Y. The diminished yoke X and the bypass yoke Y form a yoke for thereactor 2, too. - The excitation of the
transformer 1 causes a main magnetic flux to pass as shown at 1e, while the excitation of theshunt reactor 2 causes magnetic flux to pass as shown at 2e. Thecoils magnetic flux - Attention is drawn to FIGURE 4 showing a case that a
shell type transformer 1 and a shelltype shunt reactor 2 are so positioned that therespective yokes magnetic flux 1e and themagnetic flux 2e are designed for passing in opposite directions through theyoke 1c of thetransformer 1 and theyoke 2b of thereactor 2, respectively. - The apparatus shown in FIGURE 3 is obtained if the
transformer 1 and theshunt reactor 2 which are shown in FIGURE 4 are so combined that theyoke 1c of thetransformer 1 may serve as theyoke 2b of thereactor 2, too. Insofar as themagnetic fluxes yoke 1c. - Attention is also drawn to FIGURE 5 showing the magnetic flux distribution which occurs when only the
transformer 1 is excited. As is obvious from the figure, the main magnetic flux of thetransformer 1 is distributed through the diminished yoke X and the bypass yoke Y. Therefore, it is sufficient for the diminished yoke X and the bypass yoke Y to have a sum of cross-sectional areas of yokes X and Y which is equal to the original cross-sectional area of theyoke 1c. - Therefore, the apparatus shown in FIGURE 3 enables a reduction in the cross-sectional area of the yoke of the
transformer 1 by an amount equal to the difference between that of 1c as shown in FIGURE 4 or 5 and that of X, and thereby a smaller space for installation. - Although the invention has been described as a single-phase apparatus, similar results can be obtained from a three-phase apparatus as shown by way of example in FIGURE 6. Although the invention has been described as a shell type apparatus, similar results can be attained from a core type apparatus as shown by way of example in FIGURE 7.
Claims (5)
- A shared shunt reactor type transformer comprising:
a bypass yoke (Y) of a transformer (1) for serving as a yoke of a shunt reactor as well as a part of a yoke of the transformer (1), characterised in that said yoke of the transformer (1) is partially divided into two parts of a diminished yoke (X) and said bypass yoke (Y);
a gap core (2a) of the shunt reactor (2) provided to an open space formed between said diminished and bypass yokes (X,Y) of the transformer (1); and
a coil (2d) of the shunt reactor (2) wound around said gap core (2a) of the shunt reactor (2), for producing magnetic flux (2e) in a direction reducing magnetic flux of the transformer produced in said diminished yoke (X) of the transformer (1). - A shared shunt reactor type transformer as set forth in claim 1, wherein said transformer (1) and said shunt reactor (2) are respectively of a shell type.
- A shared shunt reactor type transformer as set forth in claim 1, wherein said transformer (1) and said shunt reactor (2) are respectively of a core type.
- A shared shunt reactor type transformer as set forth in claim 1, 2 or 3, wherein said transformer (1) and said shunt reactor (2) are respectively of a single-phase type.
- A shared shunt reactor type transformer as set forth in claim 1, 2 or 3, wherein said transformer (1) and said shunt reactor (2) are respectively of a three-phase type.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP173037/89 | 1989-07-06 | ||
JP1173037A JPH0682582B2 (en) | 1989-07-06 | 1989-07-06 | Shunt reactor shared transformer |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0406555A1 EP0406555A1 (en) | 1991-01-09 |
EP0406555B1 true EP0406555B1 (en) | 1993-08-11 |
Family
ID=15953033
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90109760A Expired - Lifetime EP0406555B1 (en) | 1989-07-06 | 1990-05-22 | Shared shunt reactor type transformer |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0406555B1 (en) |
JP (1) | JPH0682582B2 (en) |
CN (1) | CN1017846B (en) |
DE (1) | DE69002708T2 (en) |
HK (1) | HK1003811A1 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1993014508A1 (en) * | 1992-01-17 | 1993-07-22 | Mitsubishi Denki Kabushiki Kaisha | Transformer mounted on vehicle |
TWI378478B (en) * | 2007-01-09 | 2012-12-01 | Mitsubishi Electric Corp | Reactor-jointed transformer |
CN101960542B (en) * | 2008-03-04 | 2012-06-06 | 三菱电机株式会社 | Electric transformer |
JP5081063B2 (en) * | 2008-05-22 | 2012-11-21 | 本田技研工業株式会社 | Composite transformer and power conversion circuit |
JP5254337B2 (en) * | 2008-07-30 | 2013-08-07 | 東芝三菱電機産業システム株式会社 | Power converter |
CN102867628A (en) * | 2012-09-29 | 2013-01-09 | 湖南大学 | Magnetic integration type integrated filter inductance transformer |
DE102016202797A1 (en) * | 2016-02-24 | 2017-08-24 | Bayerische Motoren Werke Aktiengesellschaft | Combined transformer and LLC resonant converter |
CN112530676B (en) * | 2020-11-17 | 2022-09-02 | 青岛中加特电气股份有限公司 | Double-iron-core transformer |
CN113012903A (en) * | 2021-02-04 | 2021-06-22 | 中车株洲电力机车研究所有限公司 | Control framework suitable for iron core magnetic circuit multiplexing electrical system |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0630112A (en) * | 1992-04-30 | 1994-02-04 | American Teleph & Telegr Co <Att> | Method for establishment of digital channel connection |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6030112A (en) * | 1983-07-05 | 1985-02-15 | Fuji Electric Co Ltd | Shunt reactor-sharing transformers |
JPH0785653B2 (en) * | 1986-12-22 | 1995-09-13 | 三菱電機株式会社 | Three-phase transformer for cycloconverter |
-
1989
- 1989-07-06 JP JP1173037A patent/JPH0682582B2/en not_active Expired - Lifetime
-
1990
- 1990-02-23 CN CN 90100967 patent/CN1017846B/en not_active Expired
- 1990-05-22 EP EP90109760A patent/EP0406555B1/en not_active Expired - Lifetime
- 1990-05-22 DE DE1990602708 patent/DE69002708T2/en not_active Expired - Fee Related
-
1998
- 1998-04-08 HK HK98102938A patent/HK1003811A1/en not_active IP Right Cessation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0630112A (en) * | 1992-04-30 | 1994-02-04 | American Teleph & Telegr Co <Att> | Method for establishment of digital channel connection |
Also Published As
Publication number | Publication date |
---|---|
CN1048626A (en) | 1991-01-16 |
EP0406555A1 (en) | 1991-01-09 |
DE69002708D1 (en) | 1993-09-16 |
CN1017846B (en) | 1992-08-12 |
DE69002708T2 (en) | 1993-11-25 |
JPH0338807A (en) | 1991-02-19 |
HK1003811A1 (en) | 1998-11-06 |
JPH0682582B2 (en) | 1994-10-19 |
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