CN102682962A - Heat dissipation method for intermediate frequency amorphous alloy shell type transformer - Google Patents
Heat dissipation method for intermediate frequency amorphous alloy shell type transformer Download PDFInfo
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- CN102682962A CN102682962A CN2012101526710A CN201210152671A CN102682962A CN 102682962 A CN102682962 A CN 102682962A CN 2012101526710 A CN2012101526710 A CN 2012101526710A CN 201210152671 A CN201210152671 A CN 201210152671A CN 102682962 A CN102682962 A CN 102682962A
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 229910000808 amorphous metal alloy Inorganic materials 0.000 title claims abstract description 14
- 230000017525 heat dissipation Effects 0.000 title abstract description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 52
- 238000004804 winding Methods 0.000 claims abstract description 44
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 239000002828 fuel tank Substances 0.000 claims description 14
- 238000005452 bending Methods 0.000 claims description 12
- 239000005300 metallic glass Substances 0.000 claims description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 241000446313 Lamella Species 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 238000010248 power generation Methods 0.000 abstract description 4
- 238000012546 transfer Methods 0.000 abstract description 3
- 230000005855 radiation Effects 0.000 description 5
- 238000009413 insulation Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000013332 literature search Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a heat dissipation method for an intermediate frequency amorphous alloy shell type transformer, comprising the following concrete steps of: firstly, arranging heat conducting thin plates on two iron core columns of the shell type transformer in a clinging mode, and conducting heat of a middle iron core column out along the upper side and the lower side of a heat conducting plate by virtue of the heat conducting thin plates clung to the iron core columns; secondly, placing an iron core provided with a winding into an oil tank, wherein the oil tank is filled with transformer oil, and cooling a low voltage winding and a high voltage winding by virtue of a transformer oil way; and thirdly, transmitting heat produced by the transformer to external environment by virtue of convection heat transfer between the outer surface of the oil tank and the air. The heat dissipation method disclosed by the invention can effectively improve heat dissipation conditions on the middle iron core column of a thin and high intermediate frequency amorphous alloy shell type transformer and windings around, thus maximum temperature rise of the transformer is reduced. The intermediate frequency amorphous alloy shell type transformer adopted by the invention has a simple structure and process, the heat conducting plate produces no heat, occupying space is small, and no external power supply the same with that of a cooling fan is required, thus being applicable to severe environment with poor working conditions such as an offshore wind power generation platform.
Description
Technical field
The present invention relates to a kind of transformer heat dissipation technology, in particular a kind of heat dissipating method of intermediate frequency non-crystaline amorphous metal shell type transformer.
Background technology
Renewable Wind Power Utilization is just shifted by land the development to the sea.At sea in the wind power generation, submarine cable exchanges transmission and exists the reactive power fluctuation big, and direct current transmission can overcome this shortcoming, will become the development trend of marine electric power transfer from now on.In addition, land distributed generation system adopts direct current network to realize more easily that than AC network multiterminal connect.Realize that low-voltage direct must adopt the intermediate frequency transformer of KHz level to the HVDC conversion.Under the medium frequency condition, non-crystaline amorphous metal is thinner with respect to the electrical steel sheet band, has the characteristics littler than core loss.And intermediate frequency transformer is higher than the power density of Industrial Frequency Transformer, and under the same capability condition, intermediate frequency amorphous alloy transformer volume significantly reduces, and weight is lighter, thereby economizes on resources and integral device possesses miniaturization and lightweight characteristics.Therefore, adopting the intermediate frequency amorphous alloy transformer is following a kind of development trend as Oversea wind power generation DC-DC transformer.Temperature rise directly influences transformer performance, and it is aging to quicken winding insulation, makes transformer oil rotten, shortens transformer useful life.Therefore controlling temperature rise and maximum temperature is one of key issue of transformer heat radiation.
Transformer mainly contains two types of shell-type and core formulas, considers that the winding heat radiation adopts core formula structure mostly.The prior art literature search is found; Document " 1Megawatt, 20kHz, Isolated; Bidirectional 12kV to 1.2kV DC-DC Converter for Renewable Energy Applications " (The 2010 International Power Electronics Conference); Propose the radiator structure of single-phase core type transformer, between each iron core column and low pressure winding, place the heat abstractor of water-cooled, the shortcoming of this heat dissipating method is that stray field causes eddy current on radiator structure; Increase excess loss and heat, need increase the water deionizer in addition.The document has also proposed similar shell type transformer, adopts the heat dissipating method of aluminium sheet and fin respectively in upper and lower yoke; Document proposes another kind of matrix form transformer device structure simultaneously; Wherein each low pressure winding is independent, and the high pressure winding is public and set up the interlayer air duct, carries out the forced ventilation cooling heat dissipation with fan again; Not only volume is big for these two kinds of structures, and the high pressure winding arrangement technology of setting up air duct is complicated.Above-mentioned three kinds of radiator structures are feasible to the 12kV dry-type transformer, but are higher than the dielectric strength deficiency of 35kV electric pressure transformer.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, provide that a kind of structural manufacturing process is simple, control temperature rise and the effective heat dissipating method of maximum temperature.
The object of the invention is realized through following technical scheme:
A kind of heat dissipating method of intermediate frequency non-crystaline amorphous metal shell type transformer is specially:
The first, to be close to two iron core column of shell type transformer the heat conduction thin plate is set, the heat conduction thin plate through being close to iron core column is derived along heat-conducting plate the heat of middle iron core column to both sides up and down;
The second, the band winding iron core is placed in the middle of the fuel tank, is full of transformer oil in the fuel tank, through transformer oil duct cooling low pressure and high pressure winding;
The 3rd, the heat convection through fuel tank outer surface and air at last, with the heat transferred of transformer generation in external environment condition.
Further, above-mentioned two iron core column of shell type transformer of being close to are provided with the heat conduction thin plate, and the concrete operations step is following:
(1) two the heat conduction thin plates of purchasing, these two heat conduction thin plate one ends are bent into " L " type, and said end bending back " L " type heat-conducting plate is combined into the T-shape heat-conducting plate back-to-back;
(2) above-mentioned T-shape heat-conducting plate is clipped in the middle of two amorphous alloy stem stems, the non-end of opening of bending part and window coincide;
(3) according to normal process shell type transformer high-low pressure winding is installed then, and is closed window;
(4) with the other end bending of T-shape heat-conducting plate, form two back-to-back " C " type heat-conducting plates, bending part length extends to iron core yoke centre position;
(5) after the completion above-mentioned steps, continue to accomplish all the other operations and get final product according to traditional non-crystaline amorphous metal technological operation.
Preferably, said heat conduction thin plate is close to two amorphous alloy iron cores, and the fillet bending part at two ends extends to half the position on the Width of core window, and the heat conduction thin plate all has sufficient the contact and contact area with iron core and transformer oil.
Preferably, said heat conduction thin plate can use the copper sheet of non magnetic good heat conductivity to process.
Preferably, said heat conduction lamella thickness is at 0.3-1.5mm.
Compared with prior art, the present invention has the following advantages:
Press from both sides heat-conducting plate between the first, two iron core, effectively iron core interlude heat is transmitted to two ends up and down rapidly through heat-conducting plate, and exchange with the abundant contact thermal of oil reservoir, thus iron core column non-uniform temperature distributed degrees in the middle of significantly reducing.
Second; Between the high and low pressure winding, all have the oil circuit height of sufficient size between high pressure winding and the iron core column, reduced the resistance of transformer core yoke oil rising path; Accelerate the heat radiation of high and low pressure winding and iron core column, can reduce the transformer temperature rise effectively.
The 3rd, the outside winding of iron core has the area that enough contacts with oil, guarantees the winding overhang heat radiation, guarantees that end region temperature is lower.
The 4th, heat-conducting plate is clipped between two iron cores, avoid the winding stray field on heat-conducting plate, to produce eddy current, so heat-conducting plate can not produce additional heat.
Description of drawings
Fig. 1 is the structural representation (cutaway view) of the intermediate frequency amorphous alloy transformer in one embodiment of the invention;
Fig. 2 is the front view of Fig. 1
Fig. 3 is the end view of Fig. 1;
Fig. 4 is the vertical view of Fig. 1;
Fig. 5 is the heat-conducting plate sketch map;
Among the figure: 1-left side heat conduction thin plate, the right heat conduction thin plate of 2-, 3-left iron core, the right iron core of 4-, insulation 6-low pressure winding in the 5-low pressure winding, 7-high pressure winding, 8-oil tank of transformer, 9-oil duct, 10-transformer oil.
Embodiment
Elaborate in the face of embodiments of the invention down, present embodiment is that prerequisite is implemented with technical scheme of the present invention, provided detailed execution mode and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
The problem that present embodiment will solve is, finds a kind of non-compulsoryly, and structural manufacturing process is simple, and the little and light-weighted heat dissipating method of volume effectively reduces maximum temperature rise on inner iron core column of tall and thin shell formula amorphous alloy transformer and the winding.
Present embodiment intermediate frequency amorphous alloy transformer high pressure winding 50kV adopts modular combination shell-type structure, obviously reduces iron core yoke height, thereby core interior magnetic field unevenness is reduced.And; Core dimensions designs relatively flatly; Winding short transverse core dimensions is obviously big than other two-dimensional space size; Can suppress middle frequency electromagnetic field on every side effectively, thereby greatly reduce the supplementary load loss heating of transformer metal-ware and oil tank wall, can reduce the resistance of internal transformer oil flow again.
Shown in Fig. 1-5, among the figure: left heat conduction thin plate 1, right heat conduction thin plate 2, left iron core 3, right iron core 4, low pressure winding be to core insulation paper 5, low pressure winding 6, high pressure winding 7, oil tank of transformer 8, the oil duct 9 that insulating board is isolated between the high-low pressure winding, transformer oil 10.
The shell type transformer heat dissipating method that present embodiment provides is specially:
The first, be close to shell type transformer left iron core 3, right iron core 4 is provided with left heat conduction thin plate 1, right heat conduction thin plate 2, through being close to left iron core 3, the heat conduction thin plate of right iron core 4 is derived along heat-conducting plate the heat of middle iron core column to both sides up and down;
The second, the band winding iron core is placed in the middle of the fuel tank 8, is full of transformer oil 10 in the fuel tank 8, through transformer oil duct 9 cooling low pressure windings 6, high pressure winding 7;
The 3rd, the heat convection through fuel tank 8 outer surfaces and air at last, with the heat transferred of transformer generation in external environment condition.
Present embodiment left side heat conduction thin plate 1, right heat conduction thin plate 2 are according to the following steps setting:
(1) with 0.5 millimeter of thickness; The end that width is no more than the heat conduction thin plate 1,2 of iron core lateral dimension is bent into " L " type respectively; Be combined into T-shape then back-to-back; And open end with amorphous alloy iron core 3,4 non-and coincide, heat-conducting plate bending part length extends to half width position of iron core yoke.
(2) open core window, will be close to the iron core column colligation of heat-conducting plate both sides with insulating tape, secured core is realized low pressure winding and iron core column insulation isolation on the other hand on the one hand.
(3) then low pressure winding 6 is installed according to normal process, high pressure winding 7, and the insulating board between the high-low pressure winding, and form oil duct 9, close core window then.
(4) with the other end of heat conduction thin plate 1,2 respectively to the iron core of being close to 3,4 lateral bucklings; Bending part length extends to iron core yoke centre position; Form two " C " type heat conduction thin plates like this, these two " C " type heat conduction thin plates form " worker " font radiator structure back-to-back.
(5) all the other assembly processes of transformer are accomplished in continuation traditionally.
The transformer belt winding iron core that assembles is placed in the middle of the fuel tank 8, is full of transformer oil 10 in the fuel tank 8, make transformer oil 10 can with iron core 3,4, low pressure winding 6, high pressure winding 7 fully contacts with heat conduction thin plate 1,2 extensions, realizes heat exchange efficiently.Transformer oil 10 is as heat transfer medium, and its density raises with temperature and reduces, thereby deep fat rises under action of gravity; With iron core 3,4, the heat of winding 6,7 is delivered to the inwall of fuel tank 8 effectively, through heat exchange once more; The heat transformer oil 10 at inner wall of oil tank place is cooled; Its density increases, thereby flows downward, and transformer oil high temperature rises, low temperature descends forms nature circulation.Fuel tank 8 is transmitted to the lower outer wall of temperature with heat of high temperature by inwall, and carries out heat convection and thermal radiation with the fuel tank outer air, and heat transferred is in external environment the most at last.
To sum up, the present invention can improve iron core column in the middle of the tall and thin type intermediate frequency non-crystaline amorphous metal shell type transformer and the radiating condition on the winding on every side effectively, thereby reduces the maximum temperature rise of transformer.Structural manufacturing process of the present invention is simple, and heat-conducting plate itself does not produce heat, and institute takes up space little, does not also need the such external power source of cooling fan, is applicable to comparatively adverse circumstances of condition of work such as Oversea wind power generation platform.Through simulation calculation, has tangible radiating effect.
Although content of the present invention has been done detailed introduction through above-mentioned preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple modification of the present invention with to substitute all will be conspicuous.Therefore, protection scope of the present invention should be limited appended claim.
Claims (5)
1. the heat dissipating method of an intermediate frequency non-crystaline amorphous metal shell type transformer is characterized in that this method is specially:
First is close to two iron core column of shell type transformer is provided with the heat conduction thin plate, and the heat conduction thin plate through being close to iron core column is derived along heat-conducting plate the heat of middle iron core column to both sides up and down;
The second, the band winding iron core is placed in the middle of the fuel tank, is full of transformer oil in the fuel tank, through transformer oil duct cooling low pressure and high pressure winding;
The 3rd, the heat convection through fuel tank outer surface and air at last, with the heat transferred of transformer generation in external environment condition.
2. the heat dissipating method of a kind of intermediate frequency non-crystaline amorphous metal shell type transformer according to claim 1 is characterized in that, said two iron core column of shell type transformer of being close to are provided with the heat conduction thin plate, and the concrete operations step is following:
(1) two the heat conduction thin plates of purchasing, these two heat conduction thin plate one ends are bent into " L " type, and said end bending back " L " type heat-conducting plate is combined into the T-shape heat-conducting plate back-to-back;
(2) above-mentioned T-shape heat-conducting plate is clipped in the middle of two amorphous alloy stem stems, the non-end of opening of bending part and window coincide;
(3) according to normal process shell type transformer high-low pressure winding is installed then, and is closed window;
(4) with the other end bending of T-shape heat-conducting plate, form two back-to-back " C " type heat-conducting plates, bending part length extends to iron core yoke centre position;
(5) after the completion above-mentioned steps, continue to accomplish all the other operations according to traditional non-crystaline amorphous metal technological operation.
3. the heat dissipating method of a kind of intermediate frequency non-crystaline amorphous metal shell type transformer according to claim 2; It is characterized in that; Said heat conduction thin plate is close to two amorphous alloy iron cores; The fillet bending part at two ends extends to half the position on the Width of core window, the heat conduction thin plate all has sufficient the contact and contact area with iron core and transformer oil.
4. according to the heat dissipating method of each described a kind of intermediate frequency non-crystaline amorphous metal shell type transformer of claim 1-3, it is characterized in that said heat conduction thin plate uses the copper sheet of non magnetic good heat conductivity to process.
5. according to the heat dissipating method of each described a kind of intermediate frequency non-crystaline amorphous metal shell type transformer of claim 1-3, it is characterized in that said heat conduction lamella thickness is at 0.3-1.5mm.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105070474A (en) * | 2015-09-14 | 2015-11-18 | 株洲南车奇宏散热技术有限公司 | Flexible cooling method used for transformer or electric reactor and flexible cooler |
| CN105575620A (en) * | 2015-08-07 | 2016-05-11 | 马根昌 | Energy-saving transformer |
| CN111354543A (en) * | 2019-10-12 | 2020-06-30 | 台达电子企业管理（上海）有限公司 | Magnetic assembly and power module |
| CN113345676A (en) * | 2021-04-29 | 2021-09-03 | 中韶电气股份有限公司 | Energy-saving amorphous three-dimensional wound core transformer |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105575620A (en) * | 2015-08-07 | 2016-05-11 | 马根昌 | Energy-saving transformer |
| CN105575620B (en) * | 2015-08-07 | 2018-01-19 | 东莞市迈思普电子有限公司 | Energy-economic transformer |
| CN105070474A (en) * | 2015-09-14 | 2015-11-18 | 株洲南车奇宏散热技术有限公司 | Flexible cooling method used for transformer or electric reactor and flexible cooler |
| CN111354543A (en) * | 2019-10-12 | 2020-06-30 | 台达电子企业管理（上海）有限公司 | Magnetic assembly and power module |
| US11848128B2 (en) | 2019-10-12 | 2023-12-19 | Delta Electronics (Shanghai) Co., Ltd. | Magnetic component and power module |
| CN113345676A (en) * | 2021-04-29 | 2021-09-03 | 中韶电气股份有限公司 | Energy-saving amorphous three-dimensional wound core transformer |
| CN113345676B (en) * | 2021-04-29 | 2023-09-26 | 中韶电气股份有限公司 | Energy-saving amorphous three-dimensional coiled iron core transformer |
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