CN101290828B - Iron core construction with unequal intersecting surface for working at saturated magnetization zone - Google Patents
Iron core construction with unequal intersecting surface for working at saturated magnetization zone Download PDFInfo
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- CN101290828B CN101290828B CN 200710097088 CN200710097088A CN101290828B CN 101290828 B CN101290828 B CN 101290828B CN 200710097088 CN200710097088 CN 200710097088 CN 200710097088 A CN200710097088 A CN 200710097088A CN 101290828 B CN101290828 B CN 101290828B
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Abstract
The invention relates to an unequal sections iron core structure of saturated core superconducting current limiter. The iron core is a closed iron core and comprises an excitation section, a working section and a magnetic conduction section. The iron core is characterized in that: the cross-section area ratio of an excitation section iron core and a working section iron core is equal to between 1.01 and 10, the cross-section area ratio of the excitation section iron core and a magnetic conduction section iron core is equal to between 1 and 10, and cross-section area of the magnetic conduction section iron core is more than that of the working section iron core, and less than or equal to that of the excitation section iron core. The structure reduces the influence of magnetic leakage on the iron core by changing the structural shape and the dimension of the iron core further to cause magnetic potential on the iron core to be redistributed, can ensure that the iron core reaches the designed saturation under the condition of not changing or reducing excitation magnetic potential, and is particularly applicable to electromagnetic equipment, iron cores of which have magnetic biasing or work in deep saturation regions, such as saturable core superconducting fault current limiters and saturable reactors and so on.
Description
Technical field
The present invention relates to a kind of special core construction; Especially for the unequal section core construction that is operated in the magnetic saturation district; Be particularly useful for iron core and have magnetic bias or the electromagnetic equipment that is operated in degree of depth saturation region unshakable in one's determination, like saturated core type superconductive failure current limiter and saturable reactor etc.
Background technology
Saturated core type superconductive failure current limiter and saturable reactor are all by unshakable in one's determination, work winding and the common electromagnetic equipment of forming of excitation winding; Operation principle is basic identical; Promptly regulate degree of saturation unshakable in one's determination through the exciting current that changes in the excitation winding; And then the induction reactance value of the work winding that twines on the change core limb, realize its regulation and control or current-limiting function.Shown in Fig. 1-1 and Fig. 1-2; The winding 21 of wherein working has two kinds of coupled modes with excitation winding 11, and close coupling is that excitation winding 11 is positioned on the same core limb with work winding 21, and coupling coefficient is higher; But concerning voltage levels, this structure makes insulation become difficult.Therefore generally adopt the loose coupling form for voltage levels, promptly excitation winding 11 is positioned on the different core limbs of same window unshakable in one's determination with work winding 21.The core portion that will be wound with excitation winding 11 now is called excitation section 1 ', and the core portion that is wound with work winding 21 is called active section 2 ', connects these other parts of two sections and is called permeable segments 3 '.Be depicted as traditional loose coupling structure unshakable in one's determination like Fig. 1-1, wherein quadrilateral structure is usually said square shape core construction.
Because a certain period unshakable in one's determination or whole period are operated in the non-linear section of the B～H magnetization characteristic of core material; Promptly be in saturated section of saturated section or even the degree of depth; Therefore the problem that in the structure of loose coupling, always has leakage field, especially get into saturated after, the leakage field problem can be more serious.With shown in Fig. 1-2, be respectively prior art square shape iron core excitation sketch map and prior art ring-shaped core excitation sketch map like Fig. 1-1; Wherein be wound with 11 pairs of iron core excitations of excitation winding on the excitation section 1 ', the exciting current in the excitation winding 11 hour, internal magnetic field unshakable in one's determination a little less than, iron core is in the unsaturation attitude, leakage flux can be less, active section 2 ' is basic identical with the magnetic flux in the excitation section 1 '.If increase exciting current; Leakage field can be along with increase; Because the ratio that the increase of leakage field, the magnetic potential on the excitation section 1 ' account for total magnetic potential that winding produces also can be along with increase, so the relative excitation section 1 ' of the magnetic potential on the active section 2 ' reduces; It need increase exciting current in the time of will reaching certain saturation, even increases exciting current and also be difficult to reach.
No matter be saturable reactor or saturated core type superconductive failure current limiter; Because the existence of leakage field, active section 2 ' do not reach the desired saturation depth of design or just get into less than saturated mode at all, this is for saturable reactor; Just reduce its operation interval, reduced flexibility; For saturated core type superconductive current limiter, increased the stable state impedance of flow restricter, can increase in the electrical network reactive power with reduce the pressure drop of flow restricter on loading at the back, the normal operation of electrical network is caused certain influence.
Summary of the invention
The objective of the invention is to overcome the deficiency and the defective of prior art; A kind of unequal section core construction that is used to be operated in the magnetic saturation district is proposed; Through changing planform and size unshakable in one's determination, reduce the influence of leakage field to iron core, make the magnetic potential redistribution on the iron core; Excitation magnetic potential remain unchanged or situation about reducing under, can make iron core reach the saturation that is designed.
For reaching above-mentioned purpose, the present invention provides a kind of unequal section core construction that is used for saturated core type superconductive current limiter, and this iron core is that enclosed shape is unshakable in one's determination, comprises excitation section, active section and permeable segments.It is characterized in that the sectional area of the excitation iron leg heart: sectional area=1.01～10 that active section is unshakable in one's determination, the sectional area of the excitation iron leg heart: sectional area=1～10 that permeable segments is unshakable in one's determination.
Wherein, described enclosed shape iron core can be annular or polygon.
Wherein, described polygon limit number unshakable in one's determination can be 4～20.
Wherein, described excitation section is twined excitation winding, active section winding work winding, and permeable segments connects excitation section and active section.
Wherein, described excitation section and active section are in adjacent or non-conterminous position.
Wherein, described permeable segments sectional area unshakable in one's determination is greater than active section sectional area unshakable in one's determination, and is less than or equal to the sectional area of the excitation iron leg heart.
Beneficial effect of the present invention is; The unequal section core construction that is used to be operated in the magnetic saturation district of the present invention through changing planform and size unshakable in one's determination, is eliminated because the leakage field adverse effect that entering saturated mode unshakable in one's determination produces; Reduce the influence of leakage field greatly to iron core; Make the magnetic potential redistribution on the iron core, excitation magnetic potential remain unchanged or situation about reducing under, can make iron core reach the desired saturation of design.
Description of drawings
Fig. 1-1 is a prior art square shape iron core excitation sketch map;
Fig. 1-2 is a prior art ring-shaped core excitation sketch map;
Fig. 2-1 (a) (b) (c) is wrapped in the diverse location sketch map respectively for square shape unequal section core construction and the work winding that the present invention is used to be operated in the magnetic saturation district;
Fig. 2-2 is used to be operated in the annular unequal section core construction sketch map in magnetic saturation district for the present invention;
Fig. 2-3 is used to be operated in the octagon unequal section core construction sketch map in magnetic saturation district for the present invention;
Fig. 3 is applied to the vertical view of six square shapes three-phase flow restricter embodiment that forms unshakable in one's determination for the present invention;
Fig. 4 (a) is applied to the vertical view of two square shapes flow restricter embodiment that forms unshakable in one's determination for the present invention;
Fig. 4 (b) is applied to the vertical view of three each and every one the square shapes flow restricter embodiment that forms unshakable in one's determination for the present invention;
Fig. 4 (c) is applied to the vertical view of four square shapes flow restricter embodiment that forms unshakable in one's determination for the present invention.
Symbol description among the figure
(prior art)
1 ' excitation section
2 ' active section
3 ' permeable segments
(the present invention)
1 excitation section
11 excitation winding
2 active sections
21 work windings
3 permeable segments
Embodiment
Below in conjunction with description of drawings embodiment of the present invention.
Square shape unequal section core construction and the work winding 21 that Fig. 2-1 (a) is used to be operated in the magnetic saturation district for the present invention be wrapped in magnetic conduction winding 11 relative positions on the sketch map of an embodiment; It provides a kind of unequal section core construction that is used to be operated in the magnetic saturation district; This iron core is that enclosed shape is unshakable in one's determination, comprises excitation section 1, active section 2 and permeable segments 3, wherein; The sectional area of excitation section 1 iron core: sectional area=1.01～10 of active section 2 iron cores; The preferred values scope of this ratio is 1.2～3, the sectional area of excitation section 1 iron core: sectional area=1～10 of permeable segments 3 iron cores, and the preferred values of this ratio is 1～3; And the sectional area of permeable segments 3 iron cores is less than or equal to the sectional area of excitation section 1 iron core greater than the sectional area of active section 2 iron cores.Shown in the figure, the sectional area of permeable segments 3 iron cores is less than the sectional area of excitation section 1 iron core in the present embodiment.And twine excitation winding 11 on the excitation section 1, twine work winding 21 on the active section 2, permeable segments 3 connects excitation section 1 and active section 2.
Fig. 2-1 (b) and the square shape unequal section core construction and the work winding 21 that (c) are used to be operated in the magnetic saturation district for the present invention be wrapped in magnetic conduction winding 11 adjacent positions on the sketch map of two embodiment; It provides a kind of unequal section core construction that is used to be operated in the magnetic saturation district; This iron core is that enclosed shape is unshakable in one's determination, comprises excitation section 1, active section 2 and permeable segments 3, wherein; The sectional area of excitation section 1 iron core: sectional area=1.01～10 of active section 2 iron cores; The preferred values scope of this ratio is 1.2～3, the sectional area of excitation section 1 iron core: sectional area=1～10 of permeable segments 3 iron cores, and the preferred values of this ratio is 1～3; And the sectional area of permeable segments 3 iron cores is less than or equal to the sectional area of excitation section 1 iron core greater than the sectional area of active section 2 iron cores.Shown in the figure, the sectional area of permeable segments 3 iron cores is less than the sectional area of excitation section 1 iron core in the present embodiment.And remain and twine excitation winding 11 on the excitation section 1, twine work winding 21 on the active section 2, permeable segments 3 connects excitation section 1 and active section 2.
Enclosed shape iron core of the present invention can be annular, shown in Fig. 2-2, is used to be operated in the sketch map of the annular unequal section core construction embodiment in magnetic saturation district for the present invention; Should iron core be that enclosed shape is unshakable in one's determination among the figure, comprise excitation section 1, active section 2 and permeable segments 3, wherein; The sectional area of excitation section 1 iron core: sectional area=1.01～10 of active section 2 iron cores; The preferred values scope of this ratio is 1.2～3, and present embodiment is 3, the sectional area of excitation section 1 iron core: sectional area=1～10 of permeable segments 3 iron cores; The preferred values of this ratio is 1～3; Present embodiment is 2, and the sectional area of permeable segments 3 iron cores is less than or equal to the sectional area of excitation section 1 iron core greater than the sectional area of active section 2 iron cores.Shown in the figure, the sectional area of permeable segments 3 iron cores is less than the sectional area of excitation section 1 iron core in the present embodiment.
Enclosed shape iron core of the present invention also can be polygon, shown in Fig. 2-3, is used to be operated in the sketch map of the octagon unequal section core construction embodiment in magnetic saturation district for the present invention; Should iron core be that inequilateral octagon enclosed shape is unshakable in one's determination among the figure, comprise excitation section 1, active section 2 and permeable segments 3, wherein; The sectional area of excitation section 1 iron core: sectional area=1.01～10 of active section 2 iron cores; The preferred values scope of this ratio is 1.2～3, and present embodiment is 2.5, the sectional area of excitation section 1 iron core: sectional area=1～10 of permeable segments 3 iron cores; The preferred values of this ratio is 1～3; Present embodiment is 2, and the sectional area of permeable segments 3 iron cores is less than or equal to the sectional area of excitation section 1 iron core greater than the sectional area of active section 2 iron cores.Shown in the figure, the sectional area of permeable segments 3 iron cores is less than the sectional area of excitation section 1 iron core in the present embodiment.Certainly, enclosed shape polygon limit number unshakable in one's determination unshakable in one's determination can be 4～20, and present embodiment only is that example is explained with the octagon, not as limit.
As shown in Figure 3, for the present invention is applied to the vertical view of six square shapes three-phase flow restricter embodiment that forms unshakable in one's determination, six iron cores are square shape (quadrangle) or analogous shape is unshakable in one's determination among the figure; Comprise excitation section 1, active section 2 and permeable segments 3; Wherein, the sectional area of excitation section 1 iron core: sectional area=1.01～10 of active section 2 iron cores, the preferred values scope of this ratio is 1.2～3; Present embodiment is about 2; The sectional area of excitation section 1 iron core: sectional area=1～10 of permeable segments 3 iron cores, the preferred values of this ratio is 1～3, present embodiment is 1; And the sectional area of permeable segments 3 iron cores is less than or equal to the sectional area of excitation section 1 iron core greater than the sectional area of active section 2 iron cores.Shown in the figure, permeable segments 3 sectional areas unshakable in one's determination equal the sectional area of excitation section 1 iron core in the present embodiment.
The concrete parameter of present embodiment is following:
Flow restricter rated voltage 380V, rated current 20A;
Network system short circuit current 1000A, flow restrictors limit electric current 300A;
The sectional area of active section 2 iron cores: 7.06cm2,
The sectional area of excitation section 1 iron core: 15.52cm2;
Iron core window width: 140mm;
The iron core window is high: 270mm.
Through experimental verification, the iron core of this kind structure can make work unshakable in one's determination 2 reach the desired saturation of design in the application of saturated core type superconductive failure current limiter at an easy rate, and the biasing magnetic potential that excitation winding 11 is provided is also little a lot of than prior art.
The present invention's application in other respects can be the compound mode of two, three, four unequal section core constructions being described below.
Shown in Fig. 4 (a), for the present invention is applied to the vertical view of two square shape unequal sections flow restricter embodiment that forms unshakable in one's determination, two iron cores are square shape or analogous shape is unshakable in one's determination among the figure; Comprise excitation section 1, active section 2 and permeable segments 3, wherein, the sectional area of excitation section 1 iron core: sectional area=1.01～10 of active section 2 iron cores; The preferred values scope of this ratio is 1.2～3, and present embodiment is about 2, the sectional area of excitation section 1 iron core: sectional area=1～10 of permeable segments 3 iron cores; The preferred values of this ratio is 1～3; Present embodiment is 1, and the sectional area of permeable segments 3 iron cores is less than or equal to the sectional area of excitation section 1 iron core greater than the sectional area of active section 2 iron cores.Shown in the figure, permeable segments 3 sectional areas unshakable in one's determination equal the sectional area of excitation section 1 iron core in the present embodiment.
Shown in Fig. 4 (b), for the present invention is applied to the vertical view of three square shape unequal sections flow restricter embodiment that forms unshakable in one's determination, three iron cores are square shape or analogous shape is unshakable in one's determination among the figure; Likewise, shown in Fig. 4 (c), be applied to the vertical view of four square shape unequal sections flow restricter embodiment that forms unshakable in one's determination for the present invention; Four iron cores are square shape or analogous shape iron core among the figure, comprise excitation section 1, active section 2 and permeable segments 3, wherein; The sectional area of excitation section 1 iron core: sectional area=1.01～10 of active section 2 iron cores; The preferred values scope of this ratio is 1.2～3, and present embodiment is about 2, the sectional area of excitation section 1 iron core: sectional area=1～10 of permeable segments 3 iron cores; The preferred values of this ratio is 1～3; Present embodiment is 1, and the sectional area of permeable segments 3 iron cores is less than or equal to the sectional area of excitation section 1 iron core greater than the sectional area of active section 2 iron cores.Shown in the figure, permeable segments 3 sectional areas unshakable in one's determination equal the sectional area of excitation section 1 iron core in the present embodiment.
The above is merely various preferable possible embodiments of the present invention, and is non-so promptly limit to protection scope of the present invention, and the equivalent structure that every utilization specification of the present invention and accompanying drawing content have been done changes, and all is contained in the scope of claims of the present invention.
Claims (6)
1. unequal section core construction that is used for saturated core type superconductive current limiter; This iron core is that enclosed shape is unshakable in one's determination; Comprise excitation section, active section and permeable segments; It is characterized in that: the sectional area of the excitation iron leg heart: sectional area=1.01～10 that active section is unshakable in one's determination, the sectional area of the excitation iron leg heart: sectional area=1～10 that permeable segments is unshakable in one's determination.
2. unequal section core construction as claimed in claim 1 is characterized in that, described enclosed shape iron core can be annular or polygon.
3. unequal section core construction as claimed in claim 2 is characterized in that, described polygon limit number unshakable in one's determination can be 4～20.
4. unequal section core construction as claimed in claim 1 is characterized in that, described excitation section is twined excitation winding, active section winding work winding, and permeable segments connects excitation section and active section.
5. unequal section core construction as claimed in claim 1 is characterized in that, described excitation section and active section are in adjacent or non-conterminous position.
6. unequal section core construction as claimed in claim 1 is characterized in that, described permeable segments sectional area unshakable in one's determination is greater than active section sectional area unshakable in one's determination, and is less than or equal to the sectional area of the excitation iron leg heart.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710097088 CN101290828B (en) | 2007-04-17 | 2007-04-17 | Iron core construction with unequal intersecting surface for working at saturated magnetization zone |
| US12/596,645 US8582255B2 (en) | 2007-04-17 | 2008-04-17 | Core-saturated superconductive fault current limiter and control method of the fault current limiter |
| PCT/CN2008/000792 WO2008125022A1 (en) | 2007-04-17 | 2008-04-17 | Core-saturated superconductive fault current limiter and control method of the fault current limiter |
| JP2010503337A JP5102872B2 (en) | 2007-04-17 | 2008-04-17 | Saturated core type superconducting fault current limiter and control method of the fault current limiter |
| EP08733988A EP2139088B1 (en) | 2007-04-17 | 2008-04-17 | Core-saturated superconductive fault current limiter and control method of the fault current limiter |
| KR1020097021866A KR101108664B1 (en) | 2007-04-17 | 2008-04-17 | Core-saturated superconductive fault current limiter and control method of the fault current limiter |
| ES08733988T ES2398259T3 (en) | 2007-04-17 | 2008-04-17 | Loss current limiter superconducting saturated core and loss current limiter control procedure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710097088 CN101290828B (en) | 2007-04-17 | 2007-04-17 | Iron core construction with unequal intersecting surface for working at saturated magnetization zone |
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| Publication Number | Publication Date |
|---|---|
| CN101290828A CN101290828A (en) | 2008-10-22 |
| CN101290828B true CN101290828B (en) | 2012-05-09 |
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| CN 200710097088 Expired - Fee Related CN101290828B (en) | 2007-04-17 | 2007-04-17 | Iron core construction with unequal intersecting surface for working at saturated magnetization zone |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102025138A (en) * | 2009-09-15 | 2011-04-20 | 北京云电英纳超导电缆有限公司 | Parallel superconducting fault current limiter |
| WO2012016586A1 (en) * | 2010-08-03 | 2012-02-09 | Areva T&D Uk Limited | A core |
| CN102097196B (en) * | 2010-12-20 | 2012-12-05 | 北京云电英纳超导电缆有限公司 | Iron core structure with permanent magnet materials for auxiliary excitation |
| CN103354145A (en) * | 2013-06-19 | 2013-10-16 | 北京云电英纳超导电缆有限公司 | Sectional type winding structure of superconducting fault current limiter |
| CN103605894B (en) * | 2013-11-26 | 2017-06-09 | 国家电网公司 | A kind of method and device for obtaining unequal section iron core excitation characteristic |
| CN104820196B (en) * | 2015-04-11 | 2017-10-13 | 西北工业大学 | A kind of n shapes structure low-power consumption fluxgate sensor |
| CN105513760A (en) * | 2015-09-14 | 2016-04-20 | 广东新昇电业科技股份有限公司 | Three phrase unequal-cross section three-core column half-turn electric reactor and manufacturing method for same |
| CN105761882A (en) * | 2016-04-18 | 2016-07-13 | 长兴盛强电子器材有限公司 | Inductor |
| CN106205967A (en) * | 2016-06-21 | 2016-12-07 | 广东电网有限责任公司电力科学研究院 | A kind of core construction, saturation type current limiter and saturable reactor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87200101U (en) * | 1987-01-09 | 1987-10-21 | 阎武宁 | Three-phase ferromagnetic saturation voltage stabilizer with double iron core |
| US5117214A (en) * | 1991-01-28 | 1992-05-26 | Powercube Corporation | Integrated magnetic power converter core |
-
2007
- 2007-04-17 CN CN 200710097088 patent/CN101290828B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87200101U (en) * | 1987-01-09 | 1987-10-21 | 阎武宁 | Three-phase ferromagnetic saturation voltage stabilizer with double iron core |
| US5117214A (en) * | 1991-01-28 | 1992-05-26 | Powercube Corporation | Integrated magnetic power converter core |
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