CN112599340A - Silicon rubber insulation low-noise transformer with external burst short circuit resistance function - Google Patents
Silicon rubber insulation low-noise transformer with external burst short circuit resistance function Download PDFInfo
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- CN112599340A CN112599340A CN202011495946.1A CN202011495946A CN112599340A CN 112599340 A CN112599340 A CN 112599340A CN 202011495946 A CN202011495946 A CN 202011495946A CN 112599340 A CN112599340 A CN 112599340A
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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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- 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
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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
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/323—Insulation between winding turns, between winding layers
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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
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
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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
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/327—Encapsulating or impregnating
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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
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
Abstract
The invention discloses a silicon rubber insulation low-noise transformer with an external burst short circuit resistance function, which comprises an A-phase coil, a B-phase coil and a C-phase coil which are sequentially arranged, wherein the A-phase coil, the B-phase coil and the C-phase coil comprise a high-voltage coil positioned on the outer side and a low-voltage coil positioned on the inner side; and a stay is arranged between a straight part between the adjacent A-phase coil and B-phase coil and a straight part between the adjacent B-phase coil and C-phase coil, and a stay is arranged between the inner surface of the low-voltage coil and the core limb. The invention can reduce the loss and noise of the transformer by setting different phase shapes, achieve the effect of energy saving and noise reduction, simultaneously improve the mechanical strength of the coil and improve the external burst short circuit resistance of the transformer.
Description
Technical Field
The invention relates to the field of transformer structures, in particular to a silicon rubber insulation low-noise transformer with an external burst short circuit resistance function.
Background
The transformer is an electrical device for changing alternating voltage by utilizing the principle of electromagnetic induction, is widely applied to the industries of electric power, metallurgy and chemical industry, and along with the rapid development of economic construction in China, the market demand on the transformer is increasing day by day, so that the requirements on stable performance and safe operation of the transformer are required, and the requirements on the performance indexes of efficiency and loss of the transformer are increased more and more.
If a continuous cake type coil structure is adopted in a general cast high-voltage coil, the high-voltage coil generally adopts insulating parts such as a stay and a cushion block and the like in the winding process, and after the high-voltage coil is wound and cast, the stay and the cushion block are kept inside the high-voltage coil, but the existing domestic mature stay and cushion block materials generally achieve F-level or H-level insulation and hardly achieve C-level insulation; therefore, the insulation heat-resistant grade of the whole high-voltage coil can only reach F grade or H grade, and the high-voltage coil cannot be used in stricter occasions.
The cross-sectional shape of the coil in the prior art is shown in figure 1 and generally divided into an oblong shape,
Circular and circular. Wherein the oblong configuration has a poor mechanical strength in the linear portion of the coil, and therefore the overall mechanical strength of the coil is poor, but the total cost of the transformer is the lowest, while the circular configuration has the best mechanical strength, but the total cost of the transformer is the highest,
the mechanical strength and cost of a round structure is between that of an oblong and a round. At present, if the A, B, C three-phase coil adopts an oblong structure, the coil poured by silicon rubber is compared with the oblong coil
For circular and round coils, the mechanical strength is the worst, but the cost is the lowest, after the silicon rubber is poured, cured and molded, the silicon rubber is changed from a liquid state into an elastic solid state, the mechanical strength of the elastic silicon rubber is poor, and the integral mechanical strength of the coil cannot meet the requirement, so that the circular and round coils are adopted to improve the mechanical strength of the coil in the current silicon rubber pouring process
The number of circles is large, but the total cost of the transformer with the structure is high, and the applicability cannot be popularized.
As shown in fig. 2, in the prior art, a small conical head is generally arranged at the outer sides of the phase a coil, the phase B coil and the phase C coil, and is used for leading out a high-voltage coil; meanwhile, A, B, C three insulators are arranged on the clamping piece on one side of the iron core column and are connected to the insulators from the conical head through lead wires. Lead wire both ends set up the binding post of two trompils, if binding post exists burr etc., cause coil partial discharge volume increase easily, A, B, C three insulator is the epoxy resin pouring, be a rigid material, outside high tension cable links to each other with A, B, C three insulator, this kind of connected mode, the insulator receives the effect of cable external force, the insulator is easy fracture when the transformer runs for a long time, cause the increase of transformer partial discharge volume, produce lead wire earth discharge, cause transformer trouble, the outside cable that leads to the insulator simultaneously, because the effect of electric current, produce mechanical force vibration easily, cause the noise increase.
The traditional transformer low-voltage coil interlayer insulation adopts DMD epoxy prepreg cloth, the surface of the DMD epoxy prepreg cloth is pasted with a copper (aluminum) foil into a whole when the low-voltage coil is heated at high temperature, when the transformer operates, the rated current of the low-voltage coil is large, the vibration generated by the coil is large, but the DMD epoxy prepreg cloth is a rigid material and does not have the effects of vibration reduction and noise reduction.
In summary, in the prior art, the transformer has high noise, low insulation performance, and is prone to cause an external burst short circuit, so it is necessary to design a transformer structure capable of solving the above problems.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a silicon rubber insulating low-noise transformer with an external burst short circuit resistance function.
In order to achieve the purpose, the invention adopts the following technical scheme: a silicon rubber insulation low-noise transformer with an external burst short circuit resisting function comprises an A-phase coil, a B-phase coil and a C-phase coil which are sequentially arranged, wherein the A-phase coil, the B-phase coil and the C-phase coil comprise a high-voltage coil positioned on the outer side and a low-voltage coil positioned on the inner side; and a stay is arranged between a straight part between the adjacent A-phase coil and B-phase coil and a straight part between the adjacent B-phase coil and C-phase coil, and a stay is arranged between the inner surface of the low-voltage coil and the core limb.
Furthermore, the high-voltage coil is cast by adopting silicon rubber.
Furthermore, the high-voltage coil is connected with the high-voltage cable through an insulator, and the insulator is made of silicon rubber.
Furthermore, when the high-voltage coil is subjected to silicon rubber pouring, an insulator space is reserved on the outer side of the high-voltage coil to form an insulator which is integrally formed with the high-voltage coil and is located on the outer side of the high-voltage coil, and the insulator is simultaneously connected with an outlet terminal of the high-voltage coil and a high-voltage cable.
Furthermore, the high-voltage coil is a continuous cake-type coil, and a C-grade insulated enameled copper wire or a C-grade insulated enameled aluminum wire is adopted as a lead in the high-voltage coil.
Furthermore, when the high-voltage coil is wound, a plurality of pluggable taper supporting strips are uniformly distributed on the high-voltage coil winding die; and after the high-voltage coil is wound, pulling out the pluggable taper supporting strip, and pouring by adopting silicon rubber.
Furthermore, the section of the bottom surface of the pluggable taper supporting strip is smaller than that of the top surface, in the high-voltage coil winding process, the bottom surface of the pluggable taper supporting strip is inserted into the high-voltage coil winding mold, and the top surface of the pluggable taper supporting strip is exposed out of the high-voltage coil winding mold; after the winding is completed, the pluggable taper stay is pulled out through the top surface of the pluggable taper stay.
Furthermore, in the winding process of the low-voltage coils, epoxy glass grids are arranged between every two layers of low-voltage coils.
Furthermore, after the low-voltage coil is wound, silicon rubber is adopted for pouring.
Furthermore, two ends of the iron core column are fixedly connected with clamping pieces; an insulating plate is arranged between the low-voltage coil and the high-voltage coil
The invention has the beneficial effects that: the invention can reduce the loss and noise of the transformer by setting different phase shapes, achieve the effect of energy saving and noise reduction, simultaneously improve the mechanical strength of the coil and improve the external burst short circuit resistance of the transformer; the insulator is of the integrally formed structure of the silicon rubber, so that the insulator is not easy to crack, the vibration noise of the cable can be reduced, and the local discharge amount can be reduced; according to the invention, the coil is poured by adopting silicon rubber, the cushion block in the high-voltage coil is removed, and the epoxy glass grid is arranged between the voltage coil layers, so that the insulation performance of the whole transformer is ensured, and the damping and noise reduction effects are achieved.
Drawings
FIG. 1 is a schematic view of a coil shape in the prior art;
FIG. 2 is a schematic diagram of the position of an insulator in the prior art;
FIG. 3 is a schematic diagram of a coil shape according to one embodiment of the present invention;
FIG. 4 is a schematic view of a coil shape according to another embodiment of the present invention;
FIG. 5 is a schematic diagram of the iron core structure of the present invention;
FIG. 6 is a schematic view of the position of the insulator according to the present invention;
reference numerals: 1 high-voltage coil, 2 low-voltage coil, 3 iron core post, 4 stays, 5 folder, 6 insulator, 7 binding post of high-voltage coil, 8 connecting wire, 9 indisputable yoke.
Detailed Description
The invention will be further described with reference to the accompanying drawings and the detailed description below:
the invention provides a silicon rubber insulation low-noise transformer with an external burst short circuit resistance function. The phase A coil, the phase B coil and the phase C coil comprise a high-voltage coil positioned on the outer side and a low-voltage coil positioned on the inner side, the inner side of the low-voltage coil is an iron core column, the phase B coil is in an oblong shape, one sides of the phase A coil and the phase C coil positioned on two sides of the phase B coil, which are close to the phase B coil, are in the oblong shape, and one side of the phase A coil and the phase C coil, which is far away from the phase B; and a stay is arranged between the adjacent A-phase coil, B-phase coil and C-phase coil, a stay is arranged between the inner surface of the low-voltage coil and the iron core column, and an insulating plate is arranged between the high-voltage coil and the low-voltage coil.
Whereas the cross-sectional shape of the coil shown in fig. 1 of the prior art does not balance between mechanical strength and overall cost, in order to increase the mechanical strength of the coil while meeting the requirement of lower overall cost, the phase a line in this exampleThe coil and the C-phase coil adopt half
The phase B coil adopts an oblong structure, so that the cost performance of the transformer is improved, namely the mechanical strength of the coil and the total cost of the transformer reach an optimal balance state.
As shown in fig. 3, the side of the phase a coil and the phase C coil close to the phase B coil is oblong, and the side far away from the phase B coil is oval; as shown in fig. 4, the side of the phase a coil and the phase C coil close to the phase B coil is oblong, and the side far away from the phase B coil is circular. The phase A coil, the phase B coil and the phase C coil sequentially comprise a high-voltage coil 1, a low-voltage coil 2 and an iron core column 3 from outside to inside. A stay 4 is arranged between a straight line part between the adjacent A-phase coil and B-phase coil and a straight line part between the adjacent B-phase coil and C-phase coil, and a stay 4 is arranged between the inner surface of the low-voltage coil and the core limb; the stay 4 of the present invention is a rigid stay having a high mechanical stiffness, ensuring that it deforms less under stress.
Referring to fig. 5, yokes 9 are disposed at upper and lower ends of a core limb 3 according to the present invention, and specifically, the core limb includes a plurality of first core segments stacked one on another, the yoke includes a plurality of second core segments stacked one on another, and the first core segments and the second core segments corresponding to the first core segments are stacked in an interlaced manner to form a magnetic flux loop; the iron core column comprises side columns and a central column, wherein the side columns are trapezoidal and correspond to the positions of the A-phase coil and the C-phase coil; the section of the central column parallel to the first iron core plate is in a parallelogram shape and corresponds to the position of the B-phase coil. In fig. 5, windows of the core limb are also marked, and the regions other than the window positions are non-windows.
When the transformer generates an external burst short circuit, the mechanical force generated by the high-voltage coil 1 (outer coil) is in outward tension in the radial direction of the coil, the mechanical force generated by the low-voltage coil 2 (inner coil) is in inward pressure in the radial direction of the coil, and the coils are in an oblong structure in the window of the iron core column and have poor mechanical strength, so that a rigid stay is adopted between the inner surface of the low-voltage coil and the iron core column for tightening, and the outer sides of the A-phase coil and the B-phase coil are tightly supported by the rigid stayThe straight line parts between the high-voltage coils and between the C-phase coil and the high-voltage coil outside the B-phase coil are supported by rigid supporting plates to improve the mechanical strength of the long circular straight line part between the coils, and the non-window parts of the A-phase coil and the B-phase coil are in the shape of
A circular shape or a circular shape, and,
the mechanical strength of the circular watch or the circular shape is good, and the requirement of the mechanical strength can be met.
With reference to FIGS. 3-5; it can be seen that when the long circles are adopted among the phases of the transformer, the window size of the iron core column can be greatly reduced, namely the size of the iron core yoke sheet can be greatly reduced, so that the weight of the iron core silicon steel sheet is reduced, when the magnetic flux density of the iron core is unchanged, the no-load loss and the noise of the iron core are in direct proportion to the weight of the iron core, meanwhile, the relationship between the noise of the iron core and the length of the iron yoke is larger, and the longer the length of the iron yoke is, the larger the noise is, so that the loss and the noise of the transformer can be reduced, the energy-saving and noise-reducing effects can be achieved, meanwhile, the mechanical strength of the coil.
A. C-phase coil section adopts half
The semi-circle structure or semi-circle structure improves the mechanical strength of the coil, thereby improving the external burst short resistance of the transformer, reducing the size and weight of the iron core, and achieving the purposes of reducing the material cost, the no-load loss of the iron core and the noise.
As shown in fig. 2, in the prior art, an insulator 6 is fixed on one side of a clip 5, a leading-out end of a high-voltage coil is led out to a terminal 7 of the high-voltage coil through a connecting wire 8, and the insulator 6 is connected with the terminal 7 of the high-voltage coil and an outer high-voltage cable. As described in the background art, in this connection, the insulator is subject to the external force of the cable, and the insulator is prone to crack when the transformer runs for a long time, which increases the partial discharge capacity of the transformer, and causes the lead wire to discharge to the ground, which causes the transformer fault, and meanwhile, the cable led to the insulator from the outside is prone to generate mechanical vibration due to the current, which causes the noise to increase.
The high-voltage coil is cast by adopting silicon rubber, and preferably, the insulator is formed in the silicon rubber casting process in an integrally forming mode. As shown in fig. 6, the insulator 6 is used to connect the high-voltage cable on the outside and the connection terminal 7 of the high-voltage coil in the phase a coil, the phase B coil, and the phase C coil. In the embodiment, when the high-voltage coil is poured with the silicon rubber, an insulator space is reserved on the outer side of the high-voltage coil to form an insulator which is integrally formed with the high-voltage coil and is located on the outer side of the high-voltage coil, and the insulator formed under the method is located on the outer side of the high-voltage coil and is made of the silicon rubber.
This example forms a whole through whole silicon rubber pouring coil and insulator, compares like this with prior art and has just cancelled the line of connection, and the material of insulator is the silicon rubber simultaneously, is an elastic material, and the insulator receives the effect of high tension cable external force, nevertheless because the insulator has certain elasticity, can get up the effect of damping, consequently insulating difficult fracture, can reduce high tension cable's vibration noise simultaneously to can reduce the partial discharge volume.
According to the invention, the high-voltage coil and the low-voltage coil are both cast by adopting silicon rubber, and are assembled into the transformer according to the method in the prior art after casting molding. The traditional transformer generally adopts epoxy resin to cast the coil, and the curing process time of the coil is longer. The epoxy resin cast coil is typically cured in three steps: (1) curing for 8 hours at 80 ℃; (2) curing for 2 hours at 100 ℃; (3) curing for 8-10 hours at 130 ℃; the total time for completing the whole curing process is 18-20 hours. And the coil cast by the silicon rubber is cured for 2-3 hours at 130 ℃ generally, so that the production efficiency is higher.
Before improvement, if the curing time of the epoxy resin cast coil is 18 hours, the oven power is 40KW, electricity per degree is 0.71 yuan, and 3 transformer coils are cast in each oven, the electricity consumption for curing the coils in each oven is 18X 40-720 yuan, and the electricity consumption fee is 720X 0.71-511 yuan. The electricity consumption for curing of each coil is 720/3 degrees, 240 degrees, and the electricity consumption fee 511/3 is 170 yuan.
After improvement, the coils are injected with silicon rubber, the curing time is 3 hours, the baking furnace power is 40KW, each degree of electricity is 0.71 yuan, 3 transformer coils are cast in each furnace, the curing electricity consumption of each furnace coil is 3X40 ═ 120 degrees, the electricity consumption rate 120X0.71 ═ 85.2 yuan, the curing electricity consumption of each coil is 120/3 ═ 40 degrees, and the electricity consumption rate is 85.2/3 ═ 28.4 yuan. Therefore, the coil is cast by silicon rubber after improvement, the oven is lower in power consumption, more energy-saving and lower in manufacturing cost of the coil.
Preferably, the high-voltage coil is a continuous cake-shaped coil, and a C-grade insulated enameled copper wire or a C-grade insulated enameled aluminum wire is adopted as a lead in the high-voltage coil. The cushion blocks are cancelled between every wire cake of the coil, the space effective utilization rate of the wire in the coil is improved, meanwhile, during coil winding, a plurality of pluggable taper supporting strips are uniformly distributed on a coil winding die, and C-grade insulating enameled copper wires or C-grade insulating enameled aluminum wires are wound on the pluggable taper supporting strips. The bottom surface section of the pluggable taper supporting strip is smaller than the top surface section, the bottom surface of the pluggable taper supporting strip is inserted into the high-voltage coil winding mold in the high-voltage coil winding process, and the top surface of the pluggable taper supporting strip is exposed out of the high-voltage coil winding mold; after the coil is wound and the die is filled, the coil is pulled out through the top surface of the pluggable taper supporting strip, and then the coil enters the silicon rubber vacuum casting and curing process.
Compared with a cushion block which is left in the high-voltage coil and is F-level or H-level in insulation heat resistance in the prior art, the high-voltage coil only comprises two materials of a conducting wire and silicon rubber, and the insulation heat resistance level of the coil can easily reach C-level or above.
Wherein, the corresponding relation between the insulation heat-resisting grade and the temperature of the dry type transformer is as follows: class F155 ℃, class H180 ℃ and class C200 ℃; the higher the insulation heat resistance rating of the coil, the stronger the overload capability of the transformer.
Preferably, epoxy glass grids are placed between the low-voltage coil layers, and vacuum infiltration casting is performed on the silicon rubber. The low-voltage coil can also adopt a C-grade insulated enameled copper wire or a C-grade insulated enameled aluminum wire; during winding, epoxy glass grids are placed between copper (aluminum) foil layers, and after winding is completed, the whole coil is vacuum-cast by adopting silicon rubber, and the silicon rubber fully permeates into the copper (aluminum) foil layers of the coil. Compared with the structure that the DMD epoxy prepreg cloth and the low-voltage wire are pasted into a whole in the prior art, the silicon rubber is an elastic material and has the functions of vibration reduction and noise reduction, so that the vibration noise of the low-voltage coil of the transformer can be reduced.
In conclusion, the invention can reduce the loss and noise of the transformer by setting different phase shapes, achieve the effect of energy saving and noise reduction, and simultaneously can improve the mechanical strength of the coil and the external burst short circuit resistance of the transformer; the insulator is of the integrally formed structure of the silicon rubber, so that the insulator is not easy to crack, the vibration noise of the cable can be reduced, and the local discharge amount can be reduced; according to the invention, the coil is poured by adopting silicon rubber, the cushion block in the high-voltage coil is removed, and the epoxy glass grid is arranged between the voltage coil layers, so that the insulation performance of the whole transformer is ensured, and the damping and noise reduction effects are achieved.
Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes should fall within the scope of the claims of the present invention.
Claims (10)
1. A silicon rubber insulation low-noise transformer with an external burst short circuit resisting function is characterized by comprising an A-phase coil, a B-phase coil and a C-phase coil which are sequentially arranged, wherein the A-phase coil, the B-phase coil and the C-phase coil comprise a high-voltage coil positioned on the outer side and a low-voltage coil positioned on the inner side; and a stay is arranged between a straight part between the adjacent A-phase coil and B-phase coil and a straight part between the adjacent B-phase coil and C-phase coil, and a stay is arranged between the inner surface of the low-voltage coil and the core limb.
2. The silicon rubber-insulated low-noise transformer with the function of resisting the external burst short circuit according to claim 1, wherein the high-voltage coil is cast by silicon rubber.
3. The silicon rubber insulating low-noise transformer with the function of resisting the external burst short circuit as claimed in claim 2, wherein the high-voltage coil is connected with the high-voltage cable through an insulator, and the insulator is made of silicon rubber.
4. The silicon rubber insulation low noise transformer with the function of resisting the external burst short circuit according to claim 3, wherein when the high voltage coil is subjected to silicon rubber casting, an insulator space is reserved outside the high voltage coil to form an insulator which is integrally formed with the high voltage coil and located outside the high voltage coil, and the insulator is connected with an outlet terminal of the high voltage coil and a high voltage cable at the same time.
5. The silicon rubber-insulated low-noise transformer with the function of resisting the external burst short circuit according to claim 2, wherein the high-voltage coil is a continuous pancake coil, and a C-grade insulated enameled copper wire or a C-grade insulated enameled aluminum wire is adopted as a lead in the high-voltage coil.
6. The silicon rubber insulating low-noise transformer with the function of resisting the external burst short circuit according to claim 5, wherein a plurality of pluggable taper supporting strips are uniformly distributed on a high-voltage coil winding die when the high-voltage coil is wound; and after the high-voltage coil is wound, pulling out the pluggable taper supporting strip, and pouring by adopting silicon rubber.
7. The silicone rubber-insulated low-noise transformer with an external burst short-circuit resistance function according to claim 6, wherein a cross section of a bottom surface of the pluggable taper stay is smaller than a cross section of a top surface, the bottom surface of the pluggable taper stay is inserted into a high-voltage coil winding mold during a high-voltage coil winding process, and the top surface is exposed outside the high-voltage coil winding mold; after the winding is completed, the pluggable taper stay is pulled out through the top surface of the pluggable taper stay.
8. The silicon rubber-insulated low-noise transformer with the function of resisting the external burst short circuit as claimed in claim 1, wherein an epoxy glass grid is arranged between each layer of low-voltage coils in the winding process of the low-voltage coils.
9. The silicon rubber-insulated low-noise transformer with the function of resisting the external burst short circuit as claimed in claim 8, wherein the silicon rubber is used for pouring after the low-voltage coil is wound.
10. The silicon rubber-insulated low-noise transformer with the function of resisting the external burst short circuit according to claim 1, wherein clamping pieces are fixedly connected to two ends of the core limb; and an insulating plate is arranged between the low-voltage coil and the high-voltage coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011495946.1A CN112599340A (en) | 2020-12-17 | 2020-12-17 | Silicon rubber insulation low-noise transformer with external burst short circuit resistance function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011495946.1A CN112599340A (en) | 2020-12-17 | 2020-12-17 | Silicon rubber insulation low-noise transformer with external burst short circuit resistance function |
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| CN112599340A true CN112599340A (en) | 2021-04-02 |
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| CN202011495946.1A Pending CN112599340A (en) | 2020-12-17 | 2020-12-17 | Silicon rubber insulation low-noise transformer with external burst short circuit resistance function |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003133151A (en) * | 2001-10-30 | 2003-05-09 | Hitachi Media Electoronics Co Ltd | Flyback transformer |
| CN103474217A (en) * | 2013-10-09 | 2013-12-25 | 薛建仁 | Novel silicon rubber insulation dry-type power transformer |
| CN209216715U (en) * | 2019-02-22 | 2019-08-06 | 山东迪米特电气有限公司 | A kind of four core type ellipsoidal structure transformers of resistance to shorting impact |
| CN211045212U (en) * | 2019-11-21 | 2020-07-17 | 沈阳嘉恒机电设备有限公司 | Folding type three-dimensional open iron core silicon rubber dry-type transformer |
| CN211957412U (en) * | 2020-05-28 | 2020-11-17 | 浙江临高电气实业有限公司 | Transformer device |
-
2020
- 2020-12-17 CN CN202011495946.1A patent/CN112599340A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003133151A (en) * | 2001-10-30 | 2003-05-09 | Hitachi Media Electoronics Co Ltd | Flyback transformer |
| CN103474217A (en) * | 2013-10-09 | 2013-12-25 | 薛建仁 | Novel silicon rubber insulation dry-type power transformer |
| CN209216715U (en) * | 2019-02-22 | 2019-08-06 | 山东迪米特电气有限公司 | A kind of four core type ellipsoidal structure transformers of resistance to shorting impact |
| CN211045212U (en) * | 2019-11-21 | 2020-07-17 | 沈阳嘉恒机电设备有限公司 | Folding type three-dimensional open iron core silicon rubber dry-type transformer |
| CN211957412U (en) * | 2020-05-28 | 2020-11-17 | 浙江临高电气实业有限公司 | Transformer device |
Non-Patent Citations (1)
| Title |
|---|
| 变压器制造技术丛书编审委员会: "《变压器绕组制造工艺》", 30 June 1998, 机械工业出版社 * |
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