CN105469953A - Novel power transformer - Google Patents
Novel power transformer Download PDFInfo
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- CN105469953A CN105469953A CN201610020373.4A CN201610020373A CN105469953A CN 105469953 A CN105469953 A CN 105469953A CN 201610020373 A CN201610020373 A CN 201610020373A CN 105469953 A CN105469953 A CN 105469953A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/22—Component parts, details or accessories; Auxiliary operations
- B29C39/44—Measuring, controlling or regulating
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/22—Cooling by heat conduction through solid or powdered fillings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2876—Cooling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/33—Arrangements for noise damping
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/30—Applications used for thermoforming
Abstract
The invention relates to a novel power transformer. The novel power transformer comprises an iron core, an upper clamping element, a lower clamping element and a transformer coil, wherein the upper clamping element is used for clamping the upper end of the iron core, the lower clamping element is used for clamping the lower end of the iron core, the transformer encircles the iron core, an upper insulation cushion block is arranged at the top of the transformer coil, a lower insulation cushion block is arranged at the bottom of the transformer coil, a base is arranged at the bottom of the lower clamping element, a cooling fan is arranged on the side surface of the lower clamping element, an outgoing copper bar is arranged on the side surface of the upper clamping element, the transformer coil comprises a low-voltage winding and a high-voltage winding, the high-voltage winding encircles outside the low-voltage winding, pouring material layers wrap outside the low-voltage winding and the high-voltage winding, a noise reduction cooling layer wraps outside the iron core and comprises four layers from inside to outside, the four layers are sequentially a particle noise reduction layer, a first silicon adhesive tape layer, a silica gel buffer layer and a second silicon adhesive tape layer, the particle noise reduction layer comprises bentonite with granularity of 3,000 meshes, aluminum nitride with granularity of 6,000 meshes and heat conduction silica gel according to weight parts of 3:4:6, and the silica gel buffer layer is heat conduction silica gel.
Description
Technical field
The invention belongs to electrical equipment technical field, be specially a kind of novel electric power transformer.
Background technology
Transformer noise has three sound sources, and one is unshakable in one's determination, and two is windings, and three is coolers, and namely zero load, load and cooling system cause noise sum.The noise reasons that produces unshakable in one's determination is under forming electrical steel sheet action of alternating magnetic field, minor variations and magnetostriction can be there is, magnetostriction makes unshakable in one's determination to do periodic vibration with excitation frequency change, in magnetostriction distortion unshakable in one's determination and winding, fuel tank and magnetic screen caused by electromagnetic force.It is produce electromagnetic force in electric current winding that winding produces vibration cause, and stray field also can make structural member produce vibration.Electromagnetic noise producing cause is that Magnetic Field-Induced core lamination longitudinally vibrates generation noise, and this vibration amplitude can be relevant with magnetic flux density in core lamination and material magnetic unshakable in one's determination, and little with load current relation.Electromagnetic force (and vibration amplitude) is directly proportional to current squaring, and transmitting sound power is directly proportional to vibration amplitude square.Noise unshakable in one's determination is the main source of transformer noise.Epoxy resin is a kind of industrial chemicals of extensive use for a long time, and it is not only a kind of difficulty combustion, fire-retardant material, and has superior electric property, afterwards gradually by electrician's manufacturing industry is adopted.After Germany in 1964 manufactures the dry change of platform epoxy pouring type of informing against, this technology develops very fast in Europe, and constantly releases various new patent system technology for making, and these technology also constantly push the world to.Dry change manufacturing technology due to China is mainly introduced from European countries such as Germany, so in the dry-type transformer that the whole nation produces so far, the overwhelming majority is epoxy pouring type.
Patent CN102360835 discloses a kind of dry-type transformer poured with epoxy resin material, primarily of bisphenol A type epoxy resin, aluminum nitride powder, quartz sand, mica powder, amine curing agent and endurable active toughener composition, the quartz sand of aluminum nitride powder and different-grain diameter is utilized to increase heat conductivility, the advantages such as have good heat resistance, thermal diffusivity is good, and thermal coefficient of expansion is suitable with copper material.Patent CN102515626 discloses a kind of dry-type transformer high-thermal-conductivity epoxy resin castable, adopts high heat conduction inorganic particle to substitute conventional silicon powder as filler, improves the conductive coefficient of castable.High heat conduction inorganic particle is alumina powder, aluminum nitride powder or boron nitride powder.The conductive coefficient of high-thermal-conductivity epoxy resin reaches 1.1 ~ 1.3W/mK, can reduce the temperature rise of transformer.Patent 201410678408.4 discloses low noise dry-type transformer, and at transformer bottom mounting shock absorber, the vibrations that transformer is produced in running are offset, thus stress release treatment, and extend the useful life of transformer, reduce failure rate.
Summary of the invention
The object of the invention is to overcome deficiency of the prior art, provides a kind of novel electric power transformer having excellent ageing resistace and have low noise.
Novel electric power transformer of the present invention, comprise iron core, clamp the upper clamping piece of described iron core upper end and clamp the lower clamping piece of described iron core lower end, around the transformer coil of described iron core, the top of described transformer coil is provided with cross-over block, the bottom of described transformer coil is provided with lower cross-over block, the bottom of described lower clamping piece is provided with base, the side of described lower clamping piece is provided with cooling blower, and the side of described upper clamping piece is provided with outlet copper bar; Described transformer coil comprises low pressure winding and is looped around the high pressure winding outside described low pressure winding, and the outside of described low pressure winding and high pressure winding is all enclosed with the cast bed of material; The outer wrap of described iron core has noise reduction heat dissipating layer; Described noise reduction heat dissipating layer comprises four layers from the inside to surface, is particle noise reduction layer successively, the first silica gel layer of cloth, silica gel resilient coating, the second silica gel layer of cloth; Described particle noise reduction layer is by granularity 3000 object bentonite, granularity 6000 object aluminium nitride, heat conductive silica gel, and 3:4:6 ratio forms by weight; Described silica gel resilient coating is heat conductive silica gel.Wherein particle noise reduction layer mixes in proportion solidification and forms by granularity 3000 object bentonite, granularity 6000 object aluminium nitride, DOW CORNING SE4420 heat conductive silica gel, thickness 0.3cm; Silica gel resilient coating is DOW CORNING SE9184 heat conductive silica gel, thickness 0.3cm; First silica gel layer of cloth and the second silica gel layer of cloth all select U.S. Bei Gesi Sil-PadK10 silica gel cloth.
Novel electric power transformer of the present invention, the cast bed of material of described low pressure winding and high pressure winding, be made up of the component of following parts by weight: E-51 epoxy resin 100 ~ 110 parts, glycolmethacrylate phosphate 4 ~ 5 parts, vinyl neodecanoate 2 ~ 2.5 parts, methyl tetrahydrochysene phthalate anhydride 31 ~ 35 parts, DMP-30 promoter 5 ~ 6 parts, tetraethylammonium bromide 3 ~ 4 parts, rhenocure CA 3 ~ 4 parts, glycidyl neodecanoate 14 ~ 16 parts, coco amine APEO 6 ~ 8 parts, the silicon carbide powder of average grain diameter 50 nanometer 4 ~ 5 parts, the zirconium nitride powder of average grain diameter 800 nanometer 10 ~ 12 parts, the magnesium oxide powder of average grain diameter 80 nanometer 4 ~ 5 parts.
Novel electric power transformer of the present invention, the cast bed of material of described low pressure winding and high pressure winding, make by the following method:
A, get coco amine APEO 7 parts, the silicon carbide powder 4.6 parts of average grain diameter 50 nanometer, the zirconium nitride powder 11 parts of average grain diameter 800 nanometer, the magnesium oxide powder 4 parts of average grain diameter 80 nanometer by weight, mixing and stirring, then glycidyl neodecanoate 15 parts is added, at 50 DEG C, ultrasonic process 40 minutes, obtains component A;
B, get E-51 epoxy resin 105 parts, glycolmethacrylate phosphate 4.5 parts, vinyl neodecanoate 2.2 parts by weight, be uniformly mixed, obtain B component;
C, get methyl tetrahydrochysene phthalate anhydride 32 parts, DMP-30 promoter 5.6 parts, tetraethylammonium bromide 3.5 parts, rhenocure CA 3.2 parts by weight, be uniformly mixed, obtain component C;
D, by B component, component C mixing after, add component A and stir, be poured in the casting moulds of winding, then casting moulds is placed in epoxide resin vacuum casting machine, at 89 DEG C, solidify 1h, at 122 DEG C, solidify 4h; Solidify 2h at 139 DEG C, after cooling, remove casting moulds, to obtain final product.
The castable that the used in transformer coil special formulation of novel electric power transformer of the present invention is made is made through vacuum pressure cast cured explosive, novel castable, have employed the powder filler complex technique of different-grain diameter and kind, adopt the solidification of optimization to strengthen formula simultaneously, reach the unapproachable performance of single powder; Therefore there is outstanding heat conductivility and excellent mechanical property, ageing resistace.Improve the ageing-resistant performance of transformer coil, significantly improve the useful life of dry-type transformer.The present invention simultaneously adopts the heat conductive silica gel of function admirable and composite micro-powder to combine the noise reduction heat dissipating layer making sound insulation heat conducting excellent performance, and the setting of noise reduction heat dissipating layer greatly reduces the noise of transformer core.
Accompanying drawing explanation
Fig. 1 is novel electric power transformer device structure schematic diagram of the present invention.
Fig. 2 is noise reduction heat dissipating layer structural representation of the present invention.
Embodiment
The invention will be further described for embodiment plan given below; but can not be interpreted as it is limiting the scope of the invention; those skilled in the art to nonessential improvement and adjustment more of the present invention, still belong to protection scope of the present invention according to content of the present invention.
Embodiment 1: as shown in Figure 1 and Figure 2, novel electric power transformer, comprise iron core 1, the upper clamping piece 2 of clamping iron core 1 upper end and the lower clamping piece 3 of clamping iron core 1 lower end, the transformer coil 4 of wound core 1, the top of transformer coil 4 is provided with cross-over block 5, the bottom of transformer coil 4 is provided with lower cross-over block 6, the bottom of lower clamping piece 3 is provided with base 7, and the side of lower clamping piece 3 is provided with cooling blower 8, and the side of upper clamping piece 2 is provided with outlet copper bar 9; Transformer coil 4 comprises low pressure winding and is looped around the high pressure winding outside low pressure winding, and the outside of low pressure winding and high pressure winding is all enclosed with the cast bed of material; The outer wrap of iron core 1 has noise reduction heat dissipating layer; Noise reduction heat dissipating layer comprises four layers from the inside to surface, is particle noise reduction layer 10, first silica gel layer of cloth 11 successively, silica gel resilient coating 12, second silica gel layer of cloth 13; Particle noise reduction layer 10 by granularity 3000 object bentonite, granularity 6000 object aluminium nitride, DOW CORNING SE4420 heat conductive silica gel by weight 3:4:6 ratio mix solidification and form, thickness 0.3cm; Silica gel resilient coating 12 is DOW CORNING SE9184 heat conductive silica gel, thickness 0.3cm; First silica gel layer of cloth 11 and the second silica gel layer of cloth 13 all select U.S. Bei Gesi Sil-PadK10 silica gel cloth.
The cast bed of material of low pressure winding and high pressure winding, make by the following method:
A, get coco amine APEO (AC-1203) 7 kilograms, the silicon carbide powder 4.6 kilograms of average grain diameter 50 nanometer, the zirconium nitride powder 11 kilograms of average grain diameter 800 nanometer, the magnesium oxide powder 4 kilograms of average grain diameter 80 nanometer, mixing and stirring, then glycidyl neodecanoate (E-10P) 15 kilograms is added, at 50 DEG C, ultrasonic process 40 minutes, obtains component A;
B, get Phoenix brand E-51 bisphenol-A liquid epoxy resin 105 kilograms, glycolmethacrylate phosphate 4.5 kilograms, vinyl neodecanoate 2.2 kilograms, be uniformly mixed, obtain B component;
C, get methyl tetrahydrochysene phthalate anhydride 32 kilograms, DMP-30 promoter 5.6 kilograms, tetraethylammonium bromide 3.5 kilograms, rhenocure CA 3.2 kilograms, be uniformly mixed, obtain component C;
D, by B component, component C mixing after, add component A and stir, be poured in the casting moulds of winding, then casting moulds is placed in epoxide resin vacuum casting machine, at 89 DEG C, solidify 1h, at 122 DEG C, solidify 4h; Solidify 2h at 139 DEG C, after cooling, remove casting moulds, to obtain final product.
Embodiment 2: structure is as embodiment 1, and difference is the cast bed of material of low pressure winding and high pressure winding, makes by the following method:
A, get coco amine APEO (AC-1203) 6 kilograms, the silicon carbide powder 4 kilograms of average grain diameter 50 nanometer, the zirconium nitride powder 10 kilograms of average grain diameter 800 nanometer, the magnesium oxide powder 4 kilograms of average grain diameter 80 nanometer, mixing and stirring, then glycidyl neodecanoate (E-10P) 14 kilograms is added, at 50 DEG C, ultrasonic process 40 minutes, obtains component A;
B, get Phoenix brand E-51 bisphenol-A liquid epoxy resin double centner, glycolmethacrylate phosphate 4 kilograms, vinyl neodecanoate 2 kilograms, be uniformly mixed, obtain B component;
C, get methyl tetrahydrochysene phthalate anhydride 31 kilograms, DMP-30 promoter 5 kilograms, tetraethylammonium bromide 3 kilograms, rhenocure CA 3 kilograms, be uniformly mixed, obtain component C;
D, by B component, component C mixing after, add component A and stir, be poured in the casting moulds of winding, then casting moulds is placed in epoxide resin vacuum casting machine, at 89 DEG C, solidify 1h, at 122 DEG C, solidify 4h; Solidify 2h at 139 DEG C, after cooling, remove casting moulds, to obtain final product.
Embodiment 3: structure is as embodiment 1, and difference is the cast bed of material of low pressure winding and high pressure winding, makes by the following method:
A, get coco amine APEO (AC-1203) 8 kilograms, the silicon carbide powder 5 kilograms of average grain diameter 50 nanometer, the zirconium nitride powder 12 kilograms of average grain diameter 800 nanometer, the magnesium oxide powder 5 kilograms of average grain diameter 80 nanometer, mixing and stirring, then glycidyl neodecanoate (E-10P) 16 kilograms is added, at 50 DEG C, ultrasonic process 40 minutes, obtains component A;
B, get Phoenix brand E-51 bisphenol-A liquid epoxy resin 110 kilograms, glycolmethacrylate phosphate 5 kilograms, vinyl neodecanoate 2.5 kilograms, be uniformly mixed, obtain B component;
C, get methyl tetrahydrochysene phthalate anhydride 35 kilograms, DMP-30 promoter 6 kilograms, tetraethylammonium bromide 4 kilograms, rhenocure CA 4 kilograms, be uniformly mixed, obtain component C;
D, by B component, component C mixing after, add component A and stir, be poured in the casting moulds of winding, then casting moulds is placed in epoxide resin vacuum casting machine, at 89 DEG C, solidify 1h, at 122 DEG C, solidify 4h; Solidify 2h at 139 DEG C, after cooling, remove casting moulds, to obtain final product.
Transformer coil cast bed of material related experiment: experiment is divided into five groups, respectively experimental group 1, the embodiment of the present invention 1; Experimental group 2, in the embodiment of the present invention 1, the silicon carbide powder of average grain diameter 50 nanometer, the zirconium nitride powder of average grain diameter 800 nanometer, all replace with the magnesium oxide powder of average grain diameter 80 nanometer of equivalent weight; Experimental group 3, in the embodiment of the present invention 1, the silicon carbide powder of average grain diameter 50 nanometer, the magnesium oxide powder of average grain diameter 80 nanometer, all replace with the zirconium nitride powder of average grain diameter 800 nanometer of equivalent weight; Experimental group 4, in the embodiment of the present invention 1, the zirconium nitride powder of average grain diameter 800 nanometer, the magnesium oxide powder of average grain diameter 80 nanometer, all replace with the silicon carbide powder of average grain diameter 50 nanometer of equivalent weight; Control group, removes silicon carbide powder, the zirconium nitride powder of average grain diameter 800 nanometer, the magnesium oxide powder of average grain diameter 80 nanometer of average grain diameter 50 nanometer in the embodiment of the present invention 1.
Testing tool: thermal conductivity: adopt American I N-TERNAT10NACTHERMACINSTRUMENT company to produce the test of C 1 S type Conduction Coefficient Detector Basing, specimen size is 149mm × 149mm × 5mm; Thermal stability: produce the test of PhyrisTGA6 type thermal gravimetric analyzer with Perkin-Elmer company of the U.S.; 200 DEG C of air 250h weight-loss ratios, measure initial pyrolyzation temperature.Impact strength: adopt X mechanical industry electrical material product quality supervision inspection center to produce JJ-5 type freely-supported beam type shock machine and test according to GB/T16420-1996.Different group test data the results are shown in Table 1, by the thermal conductivity of the visible experimental group 1 of the present invention of table 1, apparently higher than other groups, has good heat ageing and mechanical property simultaneously.
Noise testing: according to standard GB/T 7328-87, method of testing: transformer, when rated condition is run, is measuring its sound level level apart from transformer 1m place 2203 type precision sound level meters.With equipment for power transmission and distribution Co., Ltd SCB11-500KVA dry-type transformer of mutinying for control group, experimental group 1 adopts the embodiment of the present invention 1, be made up of the transformation of SCB11-500KVA dry-type transformer, experimental group 2 is SCB11-500KVA dry-type transformer, the DOW CORNING SE9184 heat conductive silica gel that parcel 0.6cm unshakable in one's determination is thick, outermost layer parcel U.S. Bei Gesi Sil-PadK10 silica gel cloth.Adopt experimental group 1 of the present invention as seen by table 2, noise has had obvious reduction.
Claims (3)
1. a novel electric power transformer, comprise iron core, clamp the upper clamping piece of described iron core upper end and clamp the lower clamping piece of described iron core lower end, around the transformer coil of described iron core, the top of described transformer coil is provided with cross-over block, the bottom of described transformer coil is provided with lower cross-over block, the bottom of described lower clamping piece is provided with base, the side of described lower clamping piece is provided with cooling blower, and the side of described upper clamping piece is provided with outlet copper bar; It is characterized in that described transformer coil comprises low pressure winding and is looped around the high pressure winding outside described low pressure winding, the outside of described low pressure winding and high pressure winding is all enclosed with the cast bed of material; The outer wrap of described iron core has noise reduction heat dissipating layer; Described noise reduction heat dissipating layer comprises four layers from the inside to surface, is particle noise reduction layer successively, the first silica gel layer of cloth, silica gel resilient coating, the second silica gel layer of cloth; Described particle noise reduction layer is by granularity 3000 object bentonite, granularity 6000 object aluminium nitride, heat conductive silica gel, and 3:4:6 ratio forms by weight; Described silica gel resilient coating is heat conductive silica gel.
2. the novel electric power transformer according to power 1, it is characterized in that the cast bed of material of described low pressure winding and high pressure winding, be made up of the component of following parts by weight: E-51 epoxy resin 100 ~ 110 parts, glycolmethacrylate phosphate 4 ~ 5 parts, vinyl neodecanoate 2 ~ 2.5 parts, methyl tetrahydrochysene phthalate anhydride 31 ~ 35 parts, DMP-30 promoter 5 ~ 6 parts, tetraethylammonium bromide 3 ~ 4 parts, rhenocure CA 3 ~ 4 parts, glycidyl neodecanoate 14 ~ 16 parts, coco amine APEO 6 ~ 8 parts, the silicon carbide powder of average grain diameter 50 nanometer 4 ~ 5 parts, the zirconium nitride powder of average grain diameter 800 nanometer 10 ~ 12 parts, the magnesium oxide powder of average grain diameter 80 nanometer 4 ~ 5 parts.
3. novel electric power transformer according to claim 2, is characterized in that the cast bed of material of described low pressure winding and high pressure winding, makes by the following method:
A, get coco amine APEO 7 parts, the silicon carbide powder 4.6 parts of average grain diameter 50 nanometer, the zirconium nitride powder 11 parts of average grain diameter 800 nanometer, the magnesium oxide powder 4 parts of average grain diameter 80 nanometer by weight, mixing and stirring, then glycidyl neodecanoate 15 parts is added, at 50 DEG C, ultrasonic process 40 minutes, obtains component A;
B, get E-51 epoxy resin 105 parts, glycolmethacrylate phosphate 4.5 parts, vinyl neodecanoate 2.2 parts by weight, be uniformly mixed, obtain B component;
C, get methyl tetrahydrochysene phthalate anhydride 32 parts, DMP-30 promoter 5.6 parts, tetraethylammonium bromide 3.5 parts, rhenocure CA 3.2 parts by weight, be uniformly mixed, obtain component C;
D, by B component, component C mixing after, add component A and stir, be poured in the casting moulds of winding, then casting moulds is placed in epoxide resin vacuum casting machine, at 89 DEG C, solidify 1h, at 122 DEG C, solidify 4h; Solidify 2h at 139 DEG C, after cooling, remove casting moulds, to obtain final product.
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| CN201810565723.4A CN108806948B (en) | 2016-01-13 | 2016-01-13 | Castable layer, preparation method thereof and transformer with same |
| CN201610020373.4A CN105469953B (en) | 2016-01-13 | 2016-01-13 | A kind of power transformer |
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| CN201610020373.4A CN105469953B (en) | 2016-01-13 | 2016-01-13 | A kind of power transformer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106057440A (en) * | 2016-07-21 | 2016-10-26 | 国网山西省电力公司电力科学研究院 | Local-overheating cooling device for end portion of dry type transformer winding |
| CN113724964A (en) * | 2021-07-21 | 2021-11-30 | 华为数字能源技术有限公司 | Transformer and insulation packaging method thereof |
| CN113825797A (en) * | 2019-05-20 | 2021-12-21 | 三菱瓦斯化学株式会社 | Resin composition, prepreg, resin sheet with support, metal foil-clad laminate, and printed wiring board |
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| CN202601398U (en) * | 2012-05-14 | 2012-12-12 | 常州三恒电器有限公司 | Transformer |
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| CN103050229A (en) * | 2012-12-17 | 2013-04-17 | 中国船舶重工集团公司第七一二研究所 | Air and water cooled dry type rectifier transformer |
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| CN104119827A (en) * | 2014-07-25 | 2014-10-29 | 中国工程物理研究院化工材料研究所 | Room-temperature-curing epoxy-acid anhydride adhesive and preparation method thereof |
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| CN106057440A (en) * | 2016-07-21 | 2016-10-26 | 国网山西省电力公司电力科学研究院 | Local-overheating cooling device for end portion of dry type transformer winding |
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| CN113724964A (en) * | 2021-07-21 | 2021-11-30 | 华为数字能源技术有限公司 | Transformer and insulation packaging method thereof |
| CN113724964B (en) * | 2021-07-21 | 2023-11-03 | 华为数字能源技术有限公司 | Transformer and insulating packaging method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108806948B (en) | 2020-11-27 |
| CN105469953B (en) | 2018-07-03 |
| CN108806948A (en) | 2018-11-13 |
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