CN202205545U - Transformer - Google Patents
Transformer Download PDFInfo
- Publication number
- CN202205545U CN202205545U CN2011203096915U CN201120309691U CN202205545U CN 202205545 U CN202205545 U CN 202205545U CN 2011203096915 U CN2011203096915 U CN 2011203096915U CN 201120309691 U CN201120309691 U CN 201120309691U CN 202205545 U CN202205545 U CN 202205545U
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- CN
- China
- Prior art keywords
- iron core
- sectional area
- center pillar
- coil
- transformer
- 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- Withdrawn - After Issue
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Abstract
The utility model relates to a transformer, comprising an iron core, and a coil wound on the iron core, wherein the iron core comprises a middle column and two side columns arranged in parallel; the iron core is in the shape of a rectangle with a horizontal line in the middle; the coil is wound on the middle column and the side columns; and the sectional area of the middle column is smaller than that of the side column. In the transformer, as the sectional area of the middle column is smaller than that of the side column, the three-phase reluctance unbalance degree, the three-phase impedance unbalance degree, and the three-phase current unbalance degree of the coil can be reduced.
Description
Technical field
The utility model relates to a kind of transformer.
Background technology
In the design of transformer 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 typical transformer employed " day " font iron core 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 transformer 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 transformer; Comprise iron core, the coil of winding on described iron core; Described iron core comprises the center pillar that parallels setting, two side columns; Described iron core is " day " font, all is arranged with described coil on described center pillar, the described side column, 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 iron core is laminated core structure or takeup type iron core.
Preferably, it also comprises support, and described iron core is arranged on the described support.
Because technique scheme utilization; The utility model compared with prior art has advantage: because the transformer adopting center pillar sectional area of the utility model less than the iron core of side column sectional area, 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 a kind of transformer of the utility model.
Accompanying drawing 3 is the vertical view of a kind of transformer of the utility model.
Accompanying drawing 4 is the end view of a kind of transformer of the utility model.
In the above accompanying drawing: 1, iron core; 2, coil; 3, support; 4, center pillar; 5, side column.
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 transformer comprises iron core 1, winding coil 2, the support 3 on iron core 1.Iron core 1 is arranged on the support 3, is laminated core structure or takeup type iron core, in the present embodiment, adopts laminated core structure, and it comprises the center pillar 4 that parallels setting, two side columns 5, and the cross section of the cross section of side column 5, center pillar 4 is rectangle.Iron core 1 is " day " font, all is arranged with coil 2 on center pillar 4, the side column 5, and the sectional area of center pillar 4 is less than the sectional area of side column 5.Reduce three-phase magnetic resistance degree of unbalance, three-phase impedance unbalance degree and the three-phase excitation current degree of unbalance of coil 2 thus.Highly preferred, the sectional area of center pillar 4 be side column 5 sectional area 0.8-0.99 doubly, at this moment, can above-mentioned tri-phase unbalance factor all be decreased to less than 10%.
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 (5)
1. transformer; Comprise iron core, the coil of winding on described iron core; Described iron core comprises the center pillar that parallels setting, two side columns; Described iron core is " day " font, all is arranged with described coil on described center pillar, the described side column, and 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 transformer 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 transformer 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 transformer according to claim 1 is characterized in that: described iron core is laminated core structure or takeup type iron core.
5. a kind of transformer according to claim 1 is characterized in that: it also comprises support, and described iron core is arranged on the described support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203096915U CN202205545U (en) | 2011-08-24 | 2011-08-24 | Transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203096915U CN202205545U (en) | 2011-08-24 | 2011-08-24 | Transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202205545U true CN202205545U (en) | 2012-04-25 |
Family
ID=45969651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203096915U Withdrawn - After Issue CN202205545U (en) | 2011-08-24 | 2011-08-24 | Transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202205545U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360763A (en) * | 2011-08-24 | 2012-02-22 | 苏州康开电气有限公司 | Transformer |
| CN105280354A (en) * | 2015-09-30 | 2016-01-27 | 江苏华辰变压器有限公司 | Transformer with rectangular section iron core |
-
2011
- 2011-08-24 CN CN2011203096915U patent/CN202205545U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360763A (en) * | 2011-08-24 | 2012-02-22 | 苏州康开电气有限公司 | Transformer |
| CN102360763B (en) * | 2011-08-24 | 2015-07-15 | 苏州康开电气有限公司 | Transformer |
| CN105280354A (en) * | 2015-09-30 | 2016-01-27 | 江苏华辰变压器有限公司 | Transformer with rectangular section 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: 20150715 |
|
| RGAV | Abandon patent right to avoid regrant |