CN1866422A - Magnetic shielding structure for reactor with magnetic core - Google Patents
Magnetic shielding structure for reactor with magnetic core Download PDFInfo
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- CN1866422A CN1866422A CN 200510070636 CN200510070636A CN1866422A CN 1866422 A CN1866422 A CN 1866422A CN 200510070636 CN200510070636 CN 200510070636 CN 200510070636 A CN200510070636 A CN 200510070636A CN 1866422 A CN1866422 A CN 1866422A
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- shielding structure
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Abstract
The invention discloses a magnetic screen structure with magnetic core reactor, which comprises the following parts: upper iron yoke (6), lower iron yoke (2), iron core pillar (7) and coil winding (3) on the iron core pillar, wherein the diameter of upper and lower iron core pie (9) is longer than or equals middle-radius of winding. The structure is simple and reduces the swirl consumption in the magnetic screen, which improves reliability.
Description
Technical field
The invention belongs to the reactor technical field, relate to a kind of magnet shielding structure that the magnetic core reactor is arranged, be specially adapted to the magnet shielding structure of 500kV and above, big capacity shunt reactor.
Background technology
In the existing iron-core reactor, the leakage flux of core construction is big especially, can produce very big eddy current loss when leakage flux enters folder, oil tank wall and causes local overheating.For address this problem at present domestic large-scale have the magnetic core reactor especially shunt reactor all take on reactor device body and oil tank wall, magnetic screen to be set, the setting of this magnetic screen as shown in Figure 1, be arranged on the upper and lower end parts of oil tank wall inboard and winding 3, make by the polylith silicon steel sheet, form the leakage flux loop of a high magnetic conduction that constitutes by device body magnetic screen 5 and fuel tank magnetic screen 4.Originally at this moment the leakage flux that entered folder 8, oil tank wall enters in device body magnetic screen 5 and the fuel tank magnetic screen 4, greatly reduces dispersion loss, has avoided local overheating.But the magnetic screen of this structure has the following disadvantages:
When 1, leakage flux enters the magnetic screen 5 of device body vertical component is arranged, eddy current loss is bigger in magnetic screen;
2, owing to be to cement back pressurization dry solidification with epoxy resin to be shaped between the silicon steel sheet of device body and fuel tank magnetic screen, although measure such as taked colligation and be welded into one, but, run to behind the certain hour and might ftracture between silicon steel sheet, and noise is increased greatly because reactor vibration is very big;
3, the existence of fuel tank magnetic screen 4 makes that the leakage field line of force bending of winding 3 ends is more serious, and the horizontal leakage field component of winding increases, thereby strengthens the local temperature rise of the horizontal eddy current loss of winding and some line cake;
4, for to prevent that a small amount of leakage field that is not shielded to from entering at the bottom of the case, fuel tank place in bottom also is provided with copper coin 1, and complex structure has increased production cost;
5, this magnetic screen processing, manufacturing, assembling process complexity.
Summary of the invention
Technical problem to be solved by this invention is the deficiency that magnetic screen in the magnetic core reactor is arranged at above-mentioned, provide a kind of simple in structure, can reduce eddy current loss and the high magnet shielding structure that the magnetic core reactor is arranged of reliability in the magnetic screen greatly.
Solving a kind of technical scheme that the technology of the present invention problem adopted and be this has the magnet shielding structure of magnetic core reactor to comprise coil windings on upper yoke, lower yoke, core limb, the core limb, wherein, the diameter of winding upper and lower end parts cake unshakable in one's determination is more than or equal to footpath in the winding.Because cake unshakable in one's determination is magnetic screen, it is again the part of core limb, thereby make most leakage fluxs be inhaled into the main flux loop, the leakage flux that enters folder and oil tank wall is very little, avoided local overheating, this magnetic screen does not simultaneously need to bundle with the device body, and its mechanical strength height can not increase the noise of reactor.
Preferably, the thickness of upper yoke and lower yoke is set to avoid dispersion loss better more than or equal to footpath in the winding simultaneously.
Solving another kind of scheme that the technology of the present invention problem adopted and be this has the magnet shielding structure of magnetic core reactor to comprise coil windings on upper yoke, lower yoke, core limb, the core limb, and wherein, the thickness of upper yoke and lower yoke is more than or equal to footpath in the winding.Thereby make most leakage fluxs be inhaled into the main flux loop, the leakage flux that enters folder and oil tank wall is very little, has avoided local overheating, and this magnetic screen does not simultaneously need to bundle with the device body, and its mechanical strength height can not increase the noise of reactor.
Preferably, the diameter of winding upper and lower end parts cake unshakable in one's determination is set to avoid dispersion loss better more than or equal to footpath in the winding simultaneously.
Description of drawings
Fig. 1 is the structural representation of iron core of electric reactor magnetic screen in the prior art
Fig. 2 is a structural representation of the present invention
Among the figure: 1-copper coin 2-lower yoke 3-winding 4-fuel tank magnetic screen 5-device body magnetic screen 6-upper yoke 7-core limb 8-folder 9-cake L-(upper yoke or lower yoke) thickness unshakable in one's determination
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail.
As shown in Figure 2, there is the magnetic screen of magnetic core reactor to comprise coil windings 3 on upper yoke 6, lower yoke 2, core limb 7, the core limb among the present invention, the diameter of winding 3 upper and lower ends cake 9 unshakable in one's determination also can be greater than the external diameter of winding more than or equal to footpath (being the mean value of winding inner diameter and winding external diameter) in the winding.Simultaneously, the thickness L of upper yoke 6 and lower yoke 2 also can be greater than the external diameter of winding more than or equal to footpath in the winding.In the present embodiment, the diameter of winding 3 upper ends cake unshakable in one's determination equals footpath in the winding, and the diameter of winding 3 bottoms cake unshakable in one's determination equals the winding external diameter, and the thickness L of upper yoke 6 and lower yoke 2 equals footpath and winding external diameter in the winding respectively.
Beneficial effect of the present invention is as follows:
1, in the magnetic field leakage magnetic flux of various directions all along grain orientation enter iron-cored cake and about The iron yoke, the leakage magnetic flux that enters oil tank wall is very little, has reduced to greatest extent in the magnet shielding structure Eddy-current loss has been avoided hot-spot;
2, iron-cored cake is positioned at the upper and lower end parts of winding, has improved to a certain extent winding overhang The distribution of stray field descends the degree of crook of the magnetic line of force, is conducive to reduce the horizontal stroke of winding overhang To eddy-current loss;
3, owing to magnetic screen need be set on the oil tank wall, the fuel tank bottom does not need to arrange copper coin, Therefore it is simple in structure, has reduced production cost, has improved production efficiency.
Claims (4)
1. the magnet shielding structure that the magnetic core reactor is arranged comprises the coil windings (3) on upper yoke (6), lower yoke (2), core limb (7), the core limb, and the diameter that it is characterized in that winding upper and lower end cake unshakable in one's determination (9) is more than or equal to footpath in the winding.
2. the magnet shielding structure that the magnetic core reactor is arranged according to claim 1, the thickness L that it is characterized in that upper yoke and lower yoke is more than or equal to footpath in the winding.
3. the magnet shielding structure that the magnetic core reactor is arranged comprises the coil windings (3) on upper yoke (6), lower yoke (2), core limb (7), the core limb, and the thickness L that it is characterized in that upper yoke and lower yoke is more than or equal to footpath in the winding.
4. the magnet shielding structure unshakable in one's determination of reactor according to claim 3, the diameter that it is characterized in that winding upper and lower end cake unshakable in one's determination (9) is more than or equal to footpath in the winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100706364A CN100538934C (en) | 2005-05-17 | 2005-05-17 | The magnet shielding structure that the magnetic core reactor is arranged |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100706364A CN100538934C (en) | 2005-05-17 | 2005-05-17 | The magnet shielding structure that the magnetic core reactor is arranged |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1866422A true CN1866422A (en) | 2006-11-22 |
| CN100538934C CN100538934C (en) | 2009-09-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100706364A Active CN100538934C (en) | 2005-05-17 | 2005-05-17 | The magnet shielding structure that the magnetic core reactor is arranged |
Country Status (1)
| Country | Link |
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| CN (1) | CN100538934C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102315004A (en) * | 2010-06-30 | 2012-01-11 | 特变电工沈阳变压器集团有限公司 | Magnetic shielding structure and method of transformer |
| CN102580846A (en) * | 2011-11-28 | 2012-07-18 | 山东华特磁电科技股份有限公司 | Magnetic field device and magnetic separator |
| CN106783097A (en) * | 2017-02-22 | 2017-05-31 | 山东输变电设备有限公司 | Reactor body magnetic leakage shielding structure |
-
2005
- 2005-05-17 CN CNB2005100706364A patent/CN100538934C/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102315004A (en) * | 2010-06-30 | 2012-01-11 | 特变电工沈阳变压器集团有限公司 | Magnetic shielding structure and method of transformer |
| CN102315004B (en) * | 2010-06-30 | 2013-06-12 | 特变电工沈阳变压器集团有限公司 | Magnetic shielding structure and method of transformer |
| CN102580846A (en) * | 2011-11-28 | 2012-07-18 | 山东华特磁电科技股份有限公司 | Magnetic field device and magnetic separator |
| CN102580846B (en) * | 2011-11-28 | 2013-07-31 | 山东华特磁电科技股份有限公司 | Magnetic field device and magnetic separator |
| CN106783097A (en) * | 2017-02-22 | 2017-05-31 | 山东输变电设备有限公司 | Reactor body magnetic leakage shielding structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100538934C (en) | 2009-09-09 |
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