CN202205553U - Iron core - Google Patents
Iron core Download PDFInfo
- Publication number
- CN202205553U CN202205553U CN2011203097212U CN201120309721U CN202205553U CN 202205553 U CN202205553 U CN 202205553U CN 2011203097212 U CN2011203097212 U CN 2011203097212U CN 201120309721 U CN201120309721 U CN 201120309721U CN 202205553 U CN202205553 U CN 202205553U
- Authority
- CN
- China
- Prior art keywords
- iron core
- center pillar
- side column
- sectional area
- volume
- 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.)
- Withdrawn - After Issue
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 12
- 230000004907 flux Effects 0.000 description 4
- 230000005284 excitation Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
The utility model relates to an iron core which comprises the following components: a middle column, and two side columns, wherein the middle column and the two side columns are equipped in parallel. The side columns are respectively provided at two sides in an axial direction of the middle column. The iron core is shaped similar with a Chinese character 'ri'. The cross section of the middle column is smaller than that of each side column. Because the cross section of the middle column is smaller than that of each side column, the iron core can reduce unbalance degree of three-phase magnetic resistance of the coil, unbalance degree of three-phase impedance, and unbalance degree of three-phase current.
Description
Technical field
The utility model relates to a kind of iron core that is used for making electric equipments such as transformer, reactor.
Background technology
In the design of transformer or reactor and solenoid, at first to calculate magnetic flux and exciting current, one of relevant with it key parameter is " an equivalent magnetic circuit length ".
The node magnetic flux relation of the coil of " day " font iron core of using always is shown in accompanying drawing 1, and iron core comprises center pillar and the side column that is positioned at its both sides.The relation of analyzing the magnetic flux Φ of each node can draw
Because
Can obtain
Wherein Rm is the magnetic resistance of magnetic loop, and θ is the magnetomotive force of magnet exciting coil.
And by
Can obtain
ρ wherein
mBe reluctivity, l
mBe equivalent magnetic circuit length, S
mBe the magnetic circuit sectional area.
And
By above-mentioned various getting
The equivalent magnetic circuit length that is center pillar is the parallelly connected sum of the equivalent magnetic circuit length of each side column, l
M1Less than l
M2Or l
M3And the magnetic resistance in loop
Under the unequal situation of equivalent magnetic circuit length, it is uneven to cause coil the three-phase magnetic resistance to occur, and then three-phase impedance unbalance, the unbalanced situation of three-phase excitation current occur.For preventing above-mentioned unbalanced appearance, just need to change the sectional area of each magnetic circuit.
Summary of the invention
The purpose of the utility model provides a kind of through changing the iron core of three-phase magnetic resistance degree of unbalance that the magnetic circuit sectional area reduces coil, three-phase impedance unbalance degree, three-phase excitation current degree of unbalance.
For achieving the above object, the technical scheme that the utility model adopts is:
A kind of iron core comprises the center pillar that parallels setting, two side columns, and described side column lays respectively at the axial both sides of described center pillar, and described iron core is " day " font, and the sectional area of described center pillar is less than the sectional area of described side column.
Preferably, the sectional area of described center pillar be described side column sectional area 0.8-0.99 doubly.
Preferably, the cross section of the cross section of described side column, described center pillar is rectangle.
Preferably, described a kind of iron core is laminated core structure or takeup type iron core.
Further preferred, described laminated core structure comprises the silicon steel sheet that some overlaids are provided with, and described silicon steel sheet comprises the center pillar sheet that constitutes described center pillar, two side column sheets that constitute described side column.
Further preferred; Described takeup type iron core comprises that the first volume of the rectangular ring that is formed by the silicon steel sheet coiling is around portion, the second coiling portion, the 3rd coiling portion; The described first volume is set up in parallel mutually and is adjacent to the described second coiling portion around portion, described the 3rd coiling portion around the described first volume that is adjacent to mutually around the periphery of portion and the described second coiling portion and be adjacent to described periphery; The described first volume constitutes described center pillar around portion with one side that the described second coiling portion is adjacent to mutually, one side described the 3rd coiling portion and the described first volume are around portion or the described second coiling portion is adjacent to mutually and constitute described side column with described center pillar parallels.
Because technique scheme utilization; The utility model compared with prior art has advantage: because the sectional area of its center pillar of iron core of the utility model less than the sectional area of side column, can reduce three-phase magnetic resistance degree of unbalance, three-phase impedance unbalance degree, the three-phase current unbalance degree of coil.
Description of drawings
Accompanying drawing 1 is the node magnetic flux graph of a relation of iron-core coil.
Accompanying drawing 2 is the front view of embodiment one of the iron core of the utility model.
Accompanying drawing 3 is the vertical view of embodiment one of the iron core of the utility model.
Accompanying drawing 4 is the end view of embodiment one of the iron core of the utility model.
Accompanying drawing 5 is the front view of embodiment two of the iron core of the utility model.
Accompanying drawing 6 is the vertical view of embodiment two of the iron core of the utility model.
In the above accompanying drawing: 1, center pillar; 2, side column; 3, the first volume is around portion; 4, the second coiling portion; 5, the 3rd coiling portion.
Embodiment
Below in conjunction with embodiment shown in the drawings the utility model is further described.
Embodiment one: shown in accompanying drawing 2 to accompanying drawing 4.
A kind of iron core is laminated core structure, and it comprises the center pillar 1 that parallels setting, two side columns 2, and side column 2 lays respectively at the axial both sides of center pillar 1, and iron core is " day " font.Laminated core structure comprises the silicon steel sheet that some overlaids are provided with, and silicon steel sheet comprises the center pillar sheet that constitutes center pillar 1, two side column sheets that constitute side column 2.
The cross section of the cross section of side column 2, center pillar 1 is rectangle.The sectional area of center pillar 1 reduces three-phase magnetic resistance degree of unbalance, three-phase impedance unbalance degree and the three-phase excitation current degree of unbalance of coil thus less than the sectional area of side column 2.Because iron core is formed by some silicon steel sheet stacks, its thickness is certain, and promptly the silicon steel sheet sheet number of stack is identical, and therefore, the width of each center pillar sheet can be realized such scheme less than the width of side column sheet.Highly preferred, the sectional area of center pillar 1 be side column 2 sectional area 0.8-0.99 doubly, at this moment, can above-mentioned tri-phase unbalance factor all be decreased to less than 10%.At this moment, the width of center pillar sheet be the side column sheet width 0.8-0.99 doubly.
Embodiment two: shown in accompanying drawing 5 to accompanying drawing 6.
A kind of iron core is the takeup type iron core, and being reeled by some silicon steel sheets forms.
The takeup type iron core comprises by silicon steel sheet reels the first volume of the rectangular ring form around portion 3, the second coiling portion 4, the 3rd coiling portion 5; The first volume is set up in parallel mutually and is adjacent to the second coiling portion 4 around portion 3, the 3rd coiling portion 5 around the first volume that is adjacent to mutually around the periphery of the portion 3 and the second coiling portion 4 and be adjacent to periphery; The first volume constitutes center pillar 1, the three coiling portion 5 and the first volume around portion 3 or the second coiling portion 4 is adjacent to mutually and one side formation side column 2 of paralleling with center pillar 1 around reel 4 one side of being adjacent to mutually of portion 3 and second.The sectional area of the center pillar 1 of the iron core that forms owing to reel is less than the sectional area of side column 2, and therefore, the thickness of the 3rd coiling portion 5 is greater than the thickness of the first volume around the portion 3 or the second coiling portion 4.When equally, the sectional area of center pillar 1 is 0.8-0.99 times of sectional area of side column 2 is optimum state.
The foregoing description only is the technical conceive and the characteristics of explanation the utility model, and its purpose is to let the personage who is familiar with this technology can understand content of the utility model and enforcement according to this, can not limit the protection range of the utility model with this.All equivalences of being done according to the utility model spirit change or modify, and all should be encompassed within the protection range of the utility model.
Claims (6)
1. iron core; Comprise the center pillar that parallels setting, two side columns; Described side column lays respectively at the axial both sides of described center pillar, and described iron core is " day " font, it is characterized in that: the sectional area of described center pillar is less than the sectional area of described side column.
2. a kind of iron core according to claim 1 is characterized in that: the sectional area of described center pillar be described side column sectional area 0.8-0.99 doubly.
3. a kind of iron core according to claim 1 is characterized in that: the cross section of described side column, the cross section of described center pillar are rectangle.
4. a kind of iron core according to claim 1 is characterized in that: described a kind of iron core is laminated core structure or takeup type iron core.
5. a kind of iron core according to claim 4 is characterized in that: described laminated core structure comprises the silicon steel sheet that some overlaids are provided with, and described silicon steel sheet comprises the center pillar sheet that constitutes described center pillar, two side column sheets that constitute described side column.
6. a kind of iron core according to claim 4; It is characterized in that: described takeup type iron core comprises that the first volume of the rectangular ring that is formed by the silicon steel sheet coiling is around portion, the second coiling portion, the 3rd coiling portion; The described first volume is set up in parallel mutually and is adjacent to the described second coiling portion around portion, described the 3rd coiling portion around the described first volume that is adjacent to mutually around the periphery of portion and the described second coiling portion and be adjacent to described periphery; The described first volume constitutes described center pillar around portion with one side that the described second coiling portion is adjacent to mutually, one side described the 3rd coiling portion and the described first volume are around portion or the described second coiling portion is adjacent to mutually and constitute described side column with described center pillar parallels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203097212U CN202205553U (en) | 2011-08-24 | 2011-08-24 | Iron core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203097212U CN202205553U (en) | 2011-08-24 | 2011-08-24 | Iron core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202205553U true CN202205553U (en) | 2012-04-25 |
Family
ID=45969659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203097212U Withdrawn - After Issue CN202205553U (en) | 2011-08-24 | 2011-08-24 | Iron core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202205553U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360762A (en) * | 2011-08-24 | 2012-02-22 | 苏州康开电气有限公司 | Iron core |
-
2011
- 2011-08-24 CN CN2011203097212U patent/CN202205553U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360762A (en) * | 2011-08-24 | 2012-02-22 | 苏州康开电气有限公司 | Iron core |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120425 Effective date of abandoning: 20151028 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |