CN102360763A - Transformer - Google Patents
Transformer Download PDFInfo
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- CN102360763A CN102360763A CN201110243757XA CN201110243757A CN102360763A CN 102360763 A CN102360763 A CN 102360763A CN 201110243757X A CN201110243757X A CN 201110243757XA CN 201110243757 A CN201110243757 A CN 201110243757A CN 102360763 A CN102360763 A CN 102360763A
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- iron core
- center pillar
- sectional area
- transformer
- coil
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Abstract
The invention relates to a transformer, comprising an iron core and a coil wound on the iron core, wherein the iron core comprises a central pillar and two side pillars which are arranged in parallel, the iron core is in a 'RI' (Chinese character) shape, the central pillar and the side pillars are all wound with coils, and the cross area of the central pillar is smaller than that of each side pillar. In the transformer provided by the invention, the iron core which has the characteristic that the cross area of the central pillar is smaller than that of each side pillar is adopted, and three phase magnetic resistance unbalance, three phase impedance unbalance and three phase current unbalance of the coil can be reduced.
Description
Technical field
The present invention 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 this invention is to provide 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 present invention 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 present invention compared with prior art has advantage: because transformer adopting center pillar sectional area of the present invention 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 present invention.
Accompanying drawing 3 is the vertical view of a kind of transformer of the present invention.
Accompanying drawing 4 is the end view of a kind of transformer of the present invention.
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 present invention 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 explanation technical conceive of the present invention and characteristics, and its purpose is to let the personage who is familiar with this technology can understand content of the present invention and enforcement according to this, can not limit protection scope of the present invention with this.All equivalences that spirit is done according to the present invention change or modify, and all should be encompassed within protection scope of the present invention.
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 |
|---|---|---|---|
| CN201110243757.XA CN102360763B (en) | 2011-08-24 | 2011-08-24 | Transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110243757.XA CN102360763B (en) | 2011-08-24 | 2011-08-24 | Transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102360763A true CN102360763A (en) | 2012-02-22 |
| CN102360763B CN102360763B (en) | 2015-07-15 |
Family
ID=45586054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110243757.XA Active CN102360763B (en) | 2011-08-24 | 2011-08-24 | Transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102360763B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2283916Y (en) * | 1997-01-08 | 1998-06-10 | 李少夫 | Wide frame transformer core lamination |
| US20040246089A1 (en) * | 2001-08-03 | 2004-12-09 | John Stephens | Dc to dc converters |
| CN202205545U (en) * | 2011-08-24 | 2012-04-25 | 苏州康开电气有限公司 | Transformer |
-
2011
- 2011-08-24 CN CN201110243757.XA patent/CN102360763B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2283916Y (en) * | 1997-01-08 | 1998-06-10 | 李少夫 | Wide frame transformer core lamination |
| US20040246089A1 (en) * | 2001-08-03 | 2004-12-09 | John Stephens | Dc to dc converters |
| CN202205545U (en) * | 2011-08-24 | 2012-04-25 | 苏州康开电气有限公司 | Transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102360763B (en) | 2015-07-15 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |