CN103680843A - Silicon steel wire iron core transformer capable of removing eddy current - Google Patents
Silicon steel wire iron core transformer capable of removing eddy current Download PDFInfo
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- CN103680843A CN103680843A CN201310641292.2A CN201310641292A CN103680843A CN 103680843 A CN103680843 A CN 103680843A CN 201310641292 A CN201310641292 A CN 201310641292A CN 103680843 A CN103680843 A CN 103680843A
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Abstract
The invention relates to a transformer capable of improving transformer eddy current loss and discloses a silicon steel wire iron core transformer capable of effectively removing eddy current. The amorphous alloy iron core transformer comprises a coil framework wound with a coil winding, an iron core inserted into the coil framework, and a steel plate support used for mounting and supporting of all voltage transformation elements, the iron core is an E-shaped iron core formed by splicing of silicon steel wires, the axis portion of the coil framework is hollow, a protruding portion of the iron core is inserted into the hollow portion of the coil framework, an aluminum sheet is embedded on the inner side of the steel plate support, and an eddy current opening is arranged at an area, perpendicular to leakage magnetic flux, of the side face of the steel plate support. The silicon steel wire iron core transformer solves the problem that existing transformers are serious in eddy current loss and can remove eddy current loss of a conductive shell and the iron core simultaneously.
Description
Technical field
The present invention relates to a kind of device that improves transformer eddy current loss, especially refer to that a kind of simultaneously elimination can external conductive casing and the silicon steel silk appendiron core transformer of iron core vortex loss.
Background technology
A conductor outside, coil, and allow coil pass into alternating current, coil just produces alternating magnetic field so.Because the conductor in the middle of coil is equivalence to become a closed circuit enclosing at circumferencial direction, magnetic flux in closed circuit is constantly changing, therefore the circumferencial direction at conductor can produce induced electromotive force and induced current, sense of current is turn-taked along the circumferencial direction of conductor, just as the whirlpool of a circle circle, thisly there is electromagnetic induction and produce faradic phenomenon and be called vortex phenomenon monoblock conductor is inner.The outer perimeter of conductor is longer, and the frequency of alternating magnetic field is higher, and eddy current is just larger, and the eddy current of conductor inside also can produce heat, if the resistivity of conductor is little, the eddy current producing is very strong, and the heat of generation is just very large.
Owing to there being the magnetic flux of alternation in transformer core, the eddy current effect therefore producing can cause the eddy current loss of transformer.The magnetic flux of alternation induced electromotive force in winding, the while is induced electromotive force in iron core also, excites the electric current that has loop of one's own, i.e. eddy current in core interior.Because iron core has certain resistance, eddy current flows through in iron core again, produces thermal effect, and the energy loss causing is exactly eddy current loss; The magnetic flux overflowing from iron core, also can produce induction to conductor around simultaneously, and near making, conductor forms eddy current, causes equally eddy current loss.
The eddy current loss producing for transformer core, is often formed by stacking many ferromagnetic conductor thin slices (for example silicon steel sheet) for magnetic core (iron core), and these sheet surfaces scribble the oxide of thin layer insulating varnish or insulation.When magnetic flux passes the stenosed section of thin slice, eddy current is limited in along some the narrow and small loop stream mistakes in each sheet, and the clean electromotive force in these loops is less, and the length in loop is larger, so just can reduce significantly eddy current loss.So, in alternating current machine, electrical equipment, extensively adopt stacked iron core.
[patent No.] CN201220684817.1 for example, [title] a kind of transformer, [notification number] CN203070898, discloses a kind of transformer, comprises silicon steel sheet circle, plastic stent, the first enamelled wire, the second enamelled wire, cover plate and is positioned at input port and the output port of cover plate upper end; Described plastic stent is positioned at silicon steel sheet inside; Described the first enamelled wire is arranged on the upper end of plastic stent, and described the second enamelled wire is arranged on the lower end of plastic stent; Before and after described silicon steel sheet circle, both sides are provided with bearing.The utility model has limited the generation of eddy current to a certain extent, but often many ferromagnetic conductor thin slices (for example silicon steel sheet) for magnetic core (iron core) are formed by stacking to the silicon steel sheet in the iron core of existing transformer, still cannot thoroughly solve iron core vortex loss problem, because being subject to the condition restriction such as production, processing, installation, mechanical strength, its thickness is between 0.25 to 0.6 millimeter, therefore still have larger eddy current to exist, electric energy loss is larger, does not meet the requirement of energy-conserving and environment-protective.
The eddy current loss that the magnetic flux overflowing for transformer core causes, conventionally adopt electromagnetic shielding way---outside, coil windings is in interior mode for iron core.
[patent No.] CN201120552385.4 for example, [title] the eddy current minitype high voltage transformer that disappears, [notification number] CN202434311, a kind of eddy current minitype high voltage transformer that disappears is disclosed, comprise primary side bobbin, first side winding, first side winding input lead, secondary side eight groove skeletons, secondary side winding, secondary side winding output lead, secondary side line incrustation, U-shaped FERRITE CORE and insulating bushing, wherein, first side winding is on primary side bobbin, and secondary side winding is on secondary side eight groove skeletons.This eddy current minitype high voltage transformer that disappears can be by most of flux shield in iron core, and peripheral conductor is subject to affect less than large magnetic flux, but owing to having increased the magnetic flux of core interior, the eddy current consume that iron core occurs is more serious.
[patent No.] CN200420114240.6 for example, [title] a kind of low magnetic leakage low-reluctance transformer, [notification number] CN2754191, a kind of low magnetic leakage low-reluctance transformer is disclosed, it is comprised of iron core, skeleton, coil, is characterized in, coil is to be wound on 1/2 secondary coil being wound on skeleton by primary coil, another 1/2 secondary coil is wound on primary coil and forms, and iron core is to be worn around coil outside and formed by silicon steel sheet or silicon steel silk.The beneficial effects of the utility model are: due to coil by wear around silicon steel sheet or the iron core that forms of silicon steel silk surround, primary coil and secondary coil are effectively shielded, the magnetic resistance of transformer is reduced, magnetic flux increases, loss reduces, and can reduce the electrical appliance of the periphery radiated interference that generates electromagnetic waves.But similarly owing to having increased the magnetic flux of core interior, the eddy current consume that iron core occurs is more serious.
Therefore the eddy current loss of existing transformer is still serious, is not suitable for high frequency power transformation, also cannot under severe electromagnetic environment, normally use.
Summary of the invention
The object of the invention is to solve the serious problem of existing transformer eddy current loss, provide a kind of can simultaneously the elimination can external conductive casing and the eddy current transformer that disappears of iron core vortex loss.
Concrete, transformer of the present invention comprises the coil rack that is wound with coil windings and the iron core that inserts coil rack, also comprise for installing and support the stainless steel strut of all transformation elements, iron core by arm-tie by vertical or be horizontally fixed in stainless steel strut, described iron core pieces together " E " shape iron core with silicon steel silk, coil rack axial portions hollow, the protuberance at iron core middle part inserts coil rack hollow part, stainless steel strut inner side is inlaid with aluminium flake, and stainless steel strut side and leakage flux vertical area are provided with eddy current opening.
As of the present invention, further illustrate, silicon steel silk cross-sectional area is 2-5mm2, and cross sectional shape is circular or square or polygon, the outer insulating barrier that encloses of silicon steel silk, and bonding with high temperature resistant glue between silicon steel silk, bonding spacing is 0.01-0.07mm.
Two " E " shape iron cores splice relatively, and in stitching portion, are provided with " returning " shape insulating trip, and the shape of insulating trip intermediate openings and size are mated mutually with coil rack maximum radius, and coil rack runs through insulating trip; The lug boss at two iron core middle parts contacts completely, and upper and lower two pairs of lug bosses are insulated sheet and separate completely.
Coil rack is provided with the coil support portion of different radii, in the middle of being wherein positioned at and radius maximum coil support portion is high-tension coil support portion, be used for supporting high-tension coil winding, side is also provided with one or more low-voltage coils support portion, and the radius of different coil support portion successively decreases to both sides by the middle of coil rack.
Described arm-tie is anchored on stainless steel strut by vertical or level, arm-tie is that " the sub-arm-tie of [" shape combines by two or polylith, the end of every sub-arm-tie is equipped with anchoring screwed hole, side is provided with splicing screwed hole, and the arm-tie being combined into of sub-arm-tie has one or more shape " [] " dead slot.
Described arm-tie is without excitation arm-tie, and the place, gap between the screwed hole of arm-tie and sub-arm-tie is all filled with 3M resin glue.
Between each high-tension coil winding and low-voltage coil winding, be equipped with insulating barrier, block board thickness is 3-7 times of winding wire core diameter, and the core surface of coil windings is all coated with dielectric film.
The side of eddy current opening is provided with the reinforcing steel bar of two parallel open, reinforces steel bar and wraps up in aluminium suitcase, steel bar two ends and the welding of stainless steel strut prism.
The invention has the beneficial effects as follows:
1. the iron core of transformer of the present invention adopts silicon steel silk to be put together, when magnetic flux passes the stenosed section of silicon steel silk, eddy current is limited in along some the narrow and small loop stream mistakes in silicon steel silk, and the clean electromotive force in these loops is less, the length in loop is larger, so just can reduce significantly eddy current loss.
2. the stainless steel strut of transformer of the present invention inner side is inlaid with aluminium flake, and the most of magnetic flux overflowing from iron core is shielded in the space that aluminium flake surrounds, and so just stainless steel strut has been played to shielding protection effect, does not produce eddy current effect.
3. transformer of the present invention is in the very strong region of leakage field---and stainless steel strut side and leakage flux vertical area are provided with eddy current opening, and because this place does not have conductor, the magnetic flux of leakage can not produce eddy current effect because of ineffective object.
Accompanying drawing explanation
Fig. 1 is the structural representation of transformer of the present invention.
Fig. 2 is the main transformation component structure schematic diagram of transformer.
Fig. 3 is the core structure schematic diagram of transformer.
Fig. 4 is the pulling plate structure schematic diagram of transformer.
Fig. 5 is the eddy current opening ruggedized construction schematic diagram of transformer.
In figure, 1-stainless steel strut; 2-aluminium flake; 3-iron core; 301-silicon steel silk; 302-insulating barrier; 4-insulating trip; 5-coil windings; 501-high-tension coil winding; 502-low-voltage coil winding; 6-insulating barrier; 7-eddy current opening; 8-arm-tie; 801-anchoring screwed hole; 802-splicing screwed hole; 803-dead slot; 9-coil rack; 901-low-voltage coil support portion; 902-high-tension coil support portion; 10-reinforcing steel bar.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail, the present embodiment is only that the present invention is done to clearer explanation, rather than limitation of the present invention.
As shown in Figure 1, the eddy current transformer that disappears of the present invention, comprise the coil rack 9 that is wound with coil windings 5 and the iron core 3 that inserts coil rack, also comprise for installing and support the stainless steel strut 1 of all transformation elements, described iron core pieces together " E " shape iron core with silicon steel silk 301, it is horizontally fixed in stainless steel strut 1 by arm-tie 8, when magnetic flux passes the stenosed section of silicon steel silk, eddy current is limited in along some the narrow and small loop stream mistakes in silicon steel silk, clean electromotive force in these loops is less, the length in loop is larger, so just can reduce significantly eddy current loss.
Stainless steel strut side and leakage flux vertical area are provided with eddy current opening 7, even if there is magnetic flux to expose, but this place does not have conductor, because the ineffective object of magnetic flux can not produce eddy current effect.
As further illustrating of the present embodiment, as shown in Figure 2 and Figure 3, silicon steel silk 301 cross-sectional areas are 2-5mm2, and cross sectional shape is circular, the outer insulating barrier 302 that encloses of silicon steel silk, and bonding with high temperature resistant glue between silicon steel silk, bonding spacing is 0.01-0.07mm.The size of eddy current loss is relevant with factors such as the motion of the variation pattern in magnetic field, conductor, the magnetic permeability of the geometry of conductor, conductor and conductivity, if the iron of 1 square be divided into 8,16,32...... piece etc., get littlely, eddy current is less, and power consumption is fewer.The silicon steel sheet thickness of selling is in the market generally between 0.25 to 0.6mm, and silicon gauge of wire, below 0.25mm, is made permeability magnetic material with silicon steel sheet and still had larger eddy current loss, thus can be with cross section at 6mm
2following silicon steel silk replaces silicon steel sheet as magnetic conduction material, thereby reaches the object that greatly reduces iron core vortex loss.
As further illustrating of the present embodiment, as shown in Figure 1, two " E " shape iron cores 3 splice relatively, and in stitching portion, are provided with " returning " shape insulating trip 4, the shape of insulating trip intermediate openings and size are mated mutually with coil rack 9 maximum radius, and coil rack runs through insulating trip; The lug boss at two iron core middle parts contacts completely, and upper and lower two pairs of lug bosses are insulated sheet and separate completely.Most of magnetic flux can be limited in iron core like this, reduce flux leakage.
As further illustrating of the present embodiment, as shown in Figure 2, coil rack 9 is provided with the coil support portion of different radii, in the middle of being wherein positioned at and radius maximum coil support portion is that high-tension coil support portion 902 is for supporting high-tension coil winding, side is also provided with one or more low-voltage coils support portion 901, and the radius of different coil support portion successively decreases to both sides by the middle of coil rack.So just adopt alternating expression winding, leakage field group to be divided into many groups by symmetry, magnetic leakage flux obviously reduces, and electromagnetic force reduces.Greatly improved anti-short circuit capability.
As further illustrating of the present embodiment, as shown in Figure 4, arm-tie 8 is anchored on stainless steel strut 1 by vertical or level, arm-tie is by two or the polylith " combination of the sub-arm-tie of [" shape, the end of every sub-arm-tie is equipped with anchoring screwed hole 801, side is provided with splicing screwed hole 802, and the arm-tie being combined into of sub-arm-tie has one or more " [] " shape dead slot 803." [] " shape dead slot can be used as demagnetization groove in function, reduces in a large number the eddy current concentration of arm-tie inside, does not need the middle groove of processing, has reduced machining period.Can greatly save the milling cutter amount of expending, reduce costs, and the inhomogeneous moderate finite deformation causing that is heated while having avoided arm-tie due to milling groove.Pulling plate structure of the present invention and traditional structure are basic identical, can receiver body untanking mass and winding thrust during lifting, meet the requirement of mechanical strength.
As further illustrating of the present embodiment, as shown in Figure 4, arm-tie 8 is without excitation arm-tie, and the screwed hole 802 of arm-tie and place, the gap between sub-arm-tie are all filled with 3M resin glue.
As further illustrating of the present embodiment, as shown in Figure 2, between each high-tension coil winding 501 and low-voltage coil winding 502, be equipped with insulating barrier 6, block board thickness is 3-7 times of winding wire core diameter, the core surface of coil windings is all coated with dielectric film.
As further illustrating of the present embodiment, as shown in Figure 5, the side of eddy current opening is provided with the reinforcing steel bar 10 of two parallel open, reinforcing steel bar wraps up in aluminium suitcase, steel bar two ends and the welding of stainless steel strut prism, the structural stability of further having reinforced transformer, meets the requirement of mechanical strength.
Claims (8)
1. the silicon steel silk appendiron core transformer of the eddy current that can disappear, comprise the coil rack (9) that is wound with coil windings (5) and the iron core (3) that inserts coil rack, also comprise the stainless steel strut (1) for installing and support all transformation elements, it is characterized in that: described iron core (3) is " E " shape iron core that adopts silicon steel silk (31) to piece together, its by arm-tie (8) by vertically or be horizontally fixed in stainless steel strut (1); Described coil rack (9) axial portions is hollow, and the protuberance at iron core (3) middle part inserts coil rack (9) hollow part; Described stainless steel strut (1) inner side is inlaid with aluminium flake (2), and side and leakage flux vertical area are provided with eddy current opening (7).
2. transformer according to claim 1, is characterized in that: described silicon steel silk (301) cross-sectional area is 2-5mm
2, cross sectional shape is circular or square or polygon, the outer insulating barrier (302) that encloses of silicon steel silk, and bonding with high temperature resistant glue between silicon steel silk, bonding spacing is 0.01-0.07mm.
3. transformer according to claim 1, it is characterized in that: two " E " shape iron cores (3) splice relatively, and in stitching portion, be provided with " returning " shape insulating trip (4), the shape of insulating trip intermediate openings and size are mated mutually with coil rack (9) maximum radius, and coil rack runs through insulating trip; The lug boss at described two iron cores middle part contacts completely, and upper and lower two pairs of lug bosses are insulated sheet and separate completely.
4. transformer according to claim 1, it is characterized in that: described coil rack (9) is provided with the coil support portion of different radii, in the middle of being wherein positioned at and radius maximum coil support portion is high-tension coil support portion (902), side is also provided with one or more low-voltage coils support portion (901), and the radius of different coil support portion successively decreases to both sides by the middle of coil rack.
5. transformer according to claim 1, it is characterized in that: described arm-tie (8) is anchored on stainless steel strut (1) by vertical or level, arm-tie is that " the sub-arm-tie of [" shape combines by two or polylith, the end of every sub-arm-tie is equipped with anchoring screwed hole (801), side is provided with splicing screwed hole (802), and the arm-tie being combined into of sub-arm-tie has one or more " [] " shape dead slot (803).
6. transformer according to claim 5, is characterized in that: described arm-tie (8) is without excitation arm-tie, and the place, gap between the screwed hole of arm-tie (802) and sub-arm-tie is all filled with 3M resin glue.
7. transformer according to claim 1, it is characterized in that: between each high-tension coil winding (501) and low-voltage coil winding (502), be equipped with insulating barrier (6), block board thickness is 3-7 times of winding wire core diameter, and the core surface of coil windings is all coated with dielectric film.
8. transformer according to claim 1, is characterized in that: the side of described eddy current opening is provided with the reinforcing steel bar (10) of two parallel open, reinforces steel bar and wraps up in aluminium suitcase, steel bar two ends and the welding of stainless steel strut prism.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310641292.2A CN103680843B (en) | 2013-12-03 | 2013-12-03 | Silicon steel wire iron core transformer capable of removing eddy current |
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| CN201310641292.2A CN103680843B (en) | 2013-12-03 | 2013-12-03 | Silicon steel wire iron core transformer capable of removing eddy current |
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| CN103680843A true CN103680843A (en) | 2014-03-26 |
| CN103680843B CN103680843B (en) | 2017-02-15 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104592698A (en) * | 2015-01-14 | 2015-05-06 | 安徽亚海电子有限公司 | High-frequency switching mode power supply transformer |
| CN107275055A (en) * | 2017-05-12 | 2017-10-20 | 中科电力装备集团有限公司 | A kind of transformer iron-core structure |
| CN110556959A (en) * | 2019-09-29 | 2019-12-10 | 长江勘测规划设计研究有限责任公司 | Novel electromagnetic shielding structure of giant water turbine generator in strong electromagnetic environment |
| CN112119472A (en) * | 2019-08-22 | 2020-12-22 | 深圳市大疆创新科技有限公司 | Iron core, electronic device and electronic apparatus |
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| WO1990014674A1 (en) * | 1989-05-19 | 1990-11-29 | Siemens Aktiengesellschaft | Valve choke, especially for high-voltage dc transmission systems |
| CN202049854U (en) * | 2011-04-28 | 2011-11-23 | 南京国电环保设备有限公司 | High-power high-frequency high-tension rectifier transformer |
| CN202977127U (en) * | 2012-11-14 | 2013-06-05 | 海宁联丰东进电子有限公司 | LED TV (Light Emitting Diode Television) transformer capable of reducing eddy current loss |
| CN103377800A (en) * | 2012-04-14 | 2013-10-30 | 扬州丰登精密机械有限公司 | Heat-dissipating transformer |
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2013
- 2013-12-03 CN CN201310641292.2A patent/CN103680843B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1990014674A1 (en) * | 1989-05-19 | 1990-11-29 | Siemens Aktiengesellschaft | Valve choke, especially for high-voltage dc transmission systems |
| CN202049854U (en) * | 2011-04-28 | 2011-11-23 | 南京国电环保设备有限公司 | High-power high-frequency high-tension rectifier transformer |
| CN103377800A (en) * | 2012-04-14 | 2013-10-30 | 扬州丰登精密机械有限公司 | Heat-dissipating transformer |
| CN202977127U (en) * | 2012-11-14 | 2013-06-05 | 海宁联丰东进电子有限公司 | LED TV (Light Emitting Diode Television) transformer capable of reducing eddy current loss |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104592698A (en) * | 2015-01-14 | 2015-05-06 | 安徽亚海电子有限公司 | High-frequency switching mode power supply transformer |
| CN107275055A (en) * | 2017-05-12 | 2017-10-20 | 中科电力装备集团有限公司 | A kind of transformer iron-core structure |
| CN112119472A (en) * | 2019-08-22 | 2020-12-22 | 深圳市大疆创新科技有限公司 | Iron core, electronic device and electronic apparatus |
| CN110556959A (en) * | 2019-09-29 | 2019-12-10 | 长江勘测规划设计研究有限责任公司 | Novel electromagnetic shielding structure of giant water turbine generator in strong electromagnetic environment |
| CN110556959B (en) * | 2019-09-29 | 2021-09-10 | 长江勘测规划设计研究有限责任公司 | Electromagnetic shielding structure of giant water turbine generator in strong electromagnetic environment |
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