CN110993258A - High-impedance single-phase boosting dry-type transformer and manufacturing method thereof - Google Patents
High-impedance single-phase boosting dry-type transformer and manufacturing method thereof Download PDFInfo
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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
- H01F27/02—Casings
- H01F27/022—Encapsulation
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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
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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
- H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented
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- H—ELECTRICITY
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- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
- H01F27/263—Fastening parts of the core together
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- 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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- 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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- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
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- H01F27/29—Terminals; Tapping arrangements for signal inductances
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- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
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- 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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- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
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- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
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- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
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- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
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- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
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Abstract
The invention relates to a high-impedance single-phase boosting dry-type transformer and a manufacturing method thereof, belonging to the technical field of transformer design and aiming at solving the technical problem of providing a special transformer for a transformer and a reactor cabinet for a locomotive BR1004(AZ-LoK), and adopting the technical scheme that: two groups of multilayer winding coils are symmetrically wound on column irons at two sides of an iron core, each multilayer winding coil comprises a primary side coil and a secondary side coil, the primary side coils are wound in a left winding direction for 33 layers, an annular first air duct is vertically arranged in the middle of the 33 layers of primary side coils, an annular second air duct is vertically arranged outside the primary side coils, the secondary side coils are arranged outside the second air duct, the secondary side coils are wound in a right winding direction for 3 layers, and an annular third air duct is vertically arranged inside the 3 layers of secondary side coils; the invention uses the designed transformer mechanism and technical parameters to meet the requirements of the locomotive.
Description
Technical Field
The invention belongs to the technical field of transformer design, and particularly relates to a high-impedance single-phase boosting dry-type transformer and a manufacturing method thereof.
Background
The novel hybrid power locomotive is technically named as a shunting locomotive and is completely designed according to the TSI (European railway interconnection and intercommunication specification) standard and the Germany railway network EBA networking requirement, a hybrid power electric transmission mode of 'third rail + internal combustion + lithium battery' is adopted, the maximum power of the whole locomotive is 750kw, and the maximum speed per hour is 100 kilometers. The vehicle can run on a Germany main railway network, a TEN road section and a Berlin city light rail road, and is mainly used for logistics supply, tests, engineering traction and the like on a railway construction site. The transformer and the reactor cabinet of BR1004(AZ-LoK) of a German Berlin shunting locomotive are developed according to the requirements of German Federal railway company (DBAG). The locomotive is suitable for shunting and main line traction tasks in areas such as European Union railway networks, Germany railway networks, maintenance plants, shunting yards, stations, vehicle sections and the like. It can be run on all sections of the germany DB railway network, including TEN sections and berlin express railways. The system can also be used for logistics supply of railway construction sites, is used for carrying out running measurement and is used as a traction locomotive of emergency engineering, and can also be used as a traction locomotive of non-passenger marshalling vehicles and other vehicles.
(1) The environmental requirements for locomotive operation are:
altitude: less than or equal to 1400 m;
relative humidity: -25 ℃ to +55 ℃;
storage ambient temperature range: -40 ℃ to +75 ℃;
working environment temperature range: less than or equal to 75;
average annual relative humidity: less than or equal to 95;
monthly average relative humidity: the requirement of 5F3 in EN60721-3-5 needs to be met;
pollution grade: t3 (graded according to environmental conditions of EN 50125-1);
temperature grade: 5K3 (graded according to environmental conditions EN 60721-3-5);
climate grade: 5Z1 (graded according to environmental conditions EN 60721-3-5);
low air pressure: monthly average maximum relative humidity 99M (monthly average minimum temperature 25 ℃);
the installation mode is as follows: and (5) mounting under the vehicle.
(2) The main information of the locomotive is as follows:
| locomotive model | BR1004 |
| Region of use, country | Europe, Germany |
| Shaft type | Bo'Bo' |
| Locomotive maximum running speed (self-traction, traction vehicle, traction fireless returning time) | 100km/h |
| The power supply mode of the diesel generator set is as follows: | 600kW |
| traction battery power supply mode: | 150kW |
| diesel generator set and traction battery hybrid power supply mode: | 750kW |
| third rail power supply mode: | 750kW |
| the power supply mode of the diesel generator set is as follows: | 180kN |
| traction battery power supply mode: | 117kN |
| diesel generator set and traction battery hybrid power supplyAn electric mode: | 180kN |
| third rail power supply mode: | 180kN |
| electric braking mode regenerative braking wheel electric braking power | 200kW (effective when only traction accumulator works) |
| Maximum regenerative braking force | 60kN |
| Track gauge | 1435mm |
| Wheel diameter (New wheel/wearing wheel) | 860mm/780mm |
| Axle weight | 16t |
| Service life | Not less than 32 years |
| Distance of year | 30000 km |
| Annual running time | On average 3000 engines operating hours per year |
Transformers are important components of a locomotive and require a dedicated transformer for the locomotive.
Disclosure of Invention
The invention overcomes the defects of the prior art, provides a high-impedance and epoxy-cast single-phase step-up dry type transformer and a manufacturing method thereof, and provides a special transformer for a BR1004(AZ-LoK) train supply transformer and a reactor cabinet of a locomotive, the mechanism and technical parameters of the transformer meet the requirements of the locomotive, and the function of train supply and transformation is mainly realized.
In order to solve the technical problems, the invention adopts the technical scheme that: a high impedance single phase step-up dry transformer comprising: the iron core is of a vertically arranged square structure, two groups of multilayer winding coils are symmetrically wound on column irons on two sides of the iron core, the clamping pieces are arranged above and below the multilayer winding coils respectively, a plurality of pull rods are vertically arranged on the outer sides of the multilayer winding coils, the upper ends and the lower ends of the pull rods are fixed with the corresponding clamping pieces respectively, the wind shields are further arranged on the outer sides of the multilayer winding coils and fixed with the clamping pieces, and the epoxy casting layer is arranged outside the multilayer winding coils;
the multilayer winding coil comprises a primary side coil and a secondary side coil, wherein the primary side coil is wound in the left winding direction, the primary side coil is wound in 33 layers, an annular first air duct is vertically arranged in the middle of the 33 layers of the primary side coil, an annular second air duct is vertically arranged outside the primary side coil, the secondary side coil is arranged outside the second air duct, the secondary side coil is wound in the right winding direction, the secondary side coil is wound in 3 layers, and an annular third air duct is vertically arranged inside the 3 layers of the secondary side coil.
The primary side coil is provided with a primary side coil start and a primary side coil end, the primary side coil start is arranged at the upper part of the multilayer winding coil, and the primary side coil end is arranged at the lower part of the multilayer winding coil.
The secondary side coil is provided with a secondary side coil starting end and a secondary side coil finishing end, the secondary side coil starting end is arranged on the upper portion of the multilayer winding coil, and the secondary side coil finishing end is arranged on the lower portion of the multilayer winding coil.
And a bottom bracket is fixed below the clamping piece arranged below the multilayer winding coil.
The clamping piece is composed of two angle steels which are horizontally arranged in parallel, and the two angle steels are fixed through a plurality of screw rods.
The manufacturing method of the high-impedance single-phase boosting dry-type transformer comprises the following steps:
1) the iron core is as follows: the iron core is formed by laminating 0.27mm silicon steel sheets, is divided into a yoke iron part and a column iron part, is a five-line joint, is double-sheet laminated and has the weight of 627 kg. The transformer iron core is provided with a holding device which is interacted mechanically and can not be hung and hoisted;
2) assembling an iron core: the iron core assembly is divided into four parts, namely an iron core, a clamping piece insulator, a clamping piece and a bottom bracket, and the four parts are connected by a pull rod and a screw rod. The whole body adopts each clamping plate component, is matched with each supporting and tensioning fixing screw rod, is evenly stressed on the bottom bracket, and is fixedly installed with a cross beam at the bottom of the cabinet body through the bottom surface of the bracket;
3) assembling a coil: before assembling the coils, half-overlapping and wrapping an iron core column by using a weftless tape, and then sleeving the coils;
4) the multilayer winding coil: the multilayer winding coil is of an oval layered structure and is divided into a primary side coil and a secondary side coil, when winding, the primary side coil is wound in the left direction, the secondary side coil is wound in the right direction, standard transposition is carried out in the middle of each layer of the secondary side coil, the primary side coil is wound for 33 layers, the secondary side coil is wound for 3 layers, the coils of all layers are separated by insulating paper, the starting position of the primary side coil is welded with a lead copper bar and used as input of 333V voltage, and the finishing position of the secondary side coil is welded with the lead copper bar and used as output of 1000V voltage; during winding, three layers of cold-drawn strips are arranged between the coils, a bottom support and a Teflon tube are arranged, and epoxy casting is carried out on the whole; and taking out the bottom support and cold-drawing the strip. An air channel is formed at the position of the cold-drawing strip, and the outer surface and the inner gap of the coil are filled with the epoxy resin fingers, so that the coil not only plays a role of an insulating layer, but also can prevent water and fire;
5) wind shield: the wind shield is arranged on the outer side of the two groups of coils. The wind shield is used for enabling the entering wind to flow along a set wind channel so as to ensure the cooling and ventilation of the transformer, and the height of the wind shield is equal to that of a cabinet body of the transformer.
The primary side coil is wound by aluminum foil, and the secondary side coil is wound by enameled aluminum core flat wire.
The insulating paper adopts NOMEX paper.
The one deck cold drawing strip is provided with in the inside one deck cold drawing strip that is provided with of primary side coil, the inside one deck cold drawing strip that is provided with of secondary side coil, be provided with one deck cold drawing strip between primary side coil and the secondary side coil, the number of every layer cold drawing strip is 36, 36 cold drawing strip annular evenly distributed.
And after the bottom support and the cold-drawing strip are taken out, the redundant paint is removed completely, and meanwhile, the defective part on the surface is repaired.
And (3) mounting of the transformer: the transformer is installed on one side of the column power transformer and the reactor cabinet and is installed horizontally.
The main technical parameters of the transformer are as follows:
RAMS/LCC requirements:
service life: not less than 32 years;
annual running distance: 30000 km;
annual running time: an average of 3000 engines per year.
The service environment of the transformer is the same as that of the locomotive
Compared with the prior art, the invention has the following beneficial effects.
The invention provides a special transformer for a BR1004(AZ-LoK) train supply transformer and a reactor cabinet of a locomotive, the mechanism and technical parameters of the transformer meet the requirements of the locomotive, the transformation from 333V to 1000V is completed, and the function of train supply transformation is realized.
Drawings
The invention is further described below with reference to the accompanying drawings.
Fig. 1 is a top view of a high-impedance single-phase step-up dry type transformer according to the present invention.
Fig. 2 is a front view of the high-impedance single-phase step-up dry type transformer of the present invention.
Fig. 3 is a top view of a multilayer winding coil of the present invention.
Fig. 4 is a sectional view of the a-a plane of the multilayer winding coil of the present invention.
In the figure: the transformer comprises an iron core 1, a multilayer winding coil 2, a wind shield 3, a clamping piece 4, a bottom bracket 5, a pull rod 6, a screw rod 7, a primary side coil 8, a secondary side coil 9, a cold-drawn strip 10, an epoxy casting layer 11, a primary side coil starting point 12, a secondary side coil starting point 13, a primary side coil finishing point 14, a secondary side coil finishing point 15, a first air duct 16, a second air duct 17 and a third air duct 18.
Detailed Description
The present invention is further illustrated by the following specific examples.
A high impedance single phase step-up dry transformer comprising: the iron core 1 is of a vertically arranged square structure, two groups of multilayer winding coils 2 are symmetrically wound on column irons on two sides of the iron core 1, the clamping pieces 4 are arranged above and below the multilayer winding coils 2 respectively, a plurality of pull rods 6 are vertically arranged on the outer sides of the multilayer winding coils 2, the upper ends and the lower ends of the pull rods 6 are fixed with the corresponding clamping pieces 4 respectively, the wind shields 3 are arranged on the outer sides of the multilayer winding coils 2, the wind shields 3 are fixed with the clamping pieces 4, and the epoxy casting layer 11 is arranged outside the multilayer winding coils 2;
the multilayer winding coil 2 comprises a primary side coil 8 and a secondary side coil 9, the primary side coil 8 is wound in the left direction, the primary side coil 8 is wound in 33 layers, a first air duct 16 is vertically arranged in the middle of the 33 layers of the primary side coil 8, a second air duct 17 is vertically arranged outside the primary side coil 8, the secondary side coil 9 is arranged outside the second air duct 17, the secondary side coil 9 is wound in the right direction, the secondary side coil 9 is wound in 3 layers, and a vertical third air duct 18 is arranged inside the 3 layers of the secondary side coil 9.
The primary coil 8 is provided with a primary coil start 12 and a primary coil end 14, the primary coil start 12 is provided on the upper portion of the multilayer winding coil 2, and the primary coil end 14 is provided on the lower portion of the multilayer winding coil 2.
The secondary side coil 9 is provided with a secondary side coil start 13 and a secondary side coil end 15, the secondary side coil start 13 is arranged at the upper part of the multilayer winding coil 2, and the secondary side coil end 15 is arranged at the lower part of the multilayer winding coil 2.
A bottom bracket 5 is fixed below the clamping piece 4 arranged below the multilayer winding coil 2.
The clamp 4 is two angle steels horizontally arranged in parallel, and the two angle steels are fixed through a plurality of screw rods 7.
The manufacturing method of the high-impedance single-phase boosting dry-type transformer comprises the following steps:
1) the iron core 1:
the iron core 1 is formed by laminating silicon steel sheets, is divided into two parts of yoke iron and column iron, is a five-line joint and is double-sheet laminated;
2) assembling an iron core:
the iron core assembly is divided into four parts, namely an iron core 1, a clamping piece insulator, a clamping piece 4 and a bottom bracket 5, and the four parts are connected by adopting a plurality of pull rods 6 and screw rods 7;
3) assembling a coil:
before assembling the coils, half-overlapping a core column of the iron core 1 by using a weftless tape for one layer, and then sleeving the coils;
4) the multilayer winding coil 2:
the multilayer winding coil 2 is of an oval layered structure and is divided into a primary side coil 8 and a secondary side coil 9, when the multilayer winding coil is wound, the primary side coil 8 is wound in the left direction, the secondary side coil 9 is wound in the right direction, the primary side coil 8 is wound for 33 layers, the secondary side coil 9 is wound for 3 layers, the coils of all layers are separated by insulating paper, the starting position of the primary side coil 8 is welded with a lead copper bar to be used as input of 333V voltage, and the finishing position of the secondary side coil 9 is welded with the lead copper bar to be used as output of 1000V voltage;
during winding, three layers of cold-drawn strips 10 are arranged between coils, a bottom support and a Teflon tube are arranged, and epoxy casting is carried out on the whole;
then taking out the bottom support and the cold-drawing strip 10;
5) a wind shield 3:
the wind screen 3 is mounted on the outside of the two sets of coils.
The primary side coil 8 is wound by aluminum foil, and the secondary side coil 9 is wound by enameled aluminum core flat wire.
The iron core 1 is formed by laminating 0.27mm silicon steel sheets.
The insulating paper adopts NOMEX paper.
A layer of cold-drawn strips 10 is arranged in the primary side coil 8, a layer of cold-drawn strips 10 is arranged in the secondary side coil 9, and a layer of cold-drawn strips 10 is arranged between the primary side coil 8 and the secondary side coil 9.
The number of the cold-drawn strips 10 on each layer is 36, and the 36 cold-drawn strips 10 are uniformly distributed in an annular shape.
And 4) in the multilayer winding coil 2, after the bottom support and the cold-drawing strip 10 are taken out, the redundant paint is removed completely, and meanwhile, the defective part on the surface is repaired.
Six pull rods 6 are adopted.
The above embodiments are merely illustrative of the principles of the present invention and its effects, and do not limit the present invention. It will be apparent to those skilled in the art that modifications and improvements can be made to the above-described embodiments without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications or changes be made by those skilled in the art without departing from the spirit and technical spirit of the present invention, and be covered by the claims of the present invention.
Claims (9)
1. High-impedance single-phase boosting dry-type transformer, characterized by comprising: an iron core (1), a multi-layer winding coil (2), a wind shield (3), a clamping piece (4), a pull rod (6) and an epoxy casting layer (11), the iron core (1) is of a vertically arranged square structure, two groups of multilayer winding coils (2) are symmetrically wound on the column irons at two sides of the iron core (1), the clamping pieces (4) are respectively arranged above and below the multilayer winding coil (2), a plurality of pull rods (6) are vertically arranged on the outer side of the multilayer winding coil (2), the upper end and the lower end of the pull rod (6) are respectively fixed with the corresponding clamping piece (4), the outer side of the multilayer winding coil (2) is also provided with the wind shield (3), the wind shield (3) is fixed with the clamping piece (4), and the epoxy casting layer (11) is arranged outside the multilayer winding coil (2);
the multilayer winding coil (2) comprises a primary side coil (8) and a secondary side coil (9), wherein the primary side coil (8) is wound in the left direction, 33 layers of the primary side coil (8) are wound, an annular first air duct (16) is vertically arranged in the middle of the 33 layers of the primary side coil (8), an annular second air duct (17) is vertically arranged outside the primary side coil (8), the secondary side coil (9) is arranged outside the second air duct (17), the secondary side coil (9) is wound in the right direction, 3 layers of the secondary side coil (9) are wound, and an annular third air duct (18) is vertically arranged inside the secondary side coil (9).
2. A method for manufacturing a high-impedance single-phase step-up dry type transformer according to claim 1, wherein:
1) the iron core (1):
the iron core (1) is formed by laminating silicon steel sheets, is divided into two parts of yoke iron and column iron, is a five-line joint and is double-sheet laminated;
2) assembling the iron core (1):
the iron core (1) is assembled into four parts, namely an iron core (1), a clamping piece insulator, a clamping piece (4) and a bottom bracket (5), and the four parts are connected by adopting a plurality of pull rods (6) and screw rods (7);
3) assembling a coil:
before assembling the coils, half-overlapping a core column of the iron core (1) by using a non-weft tape for one layer, and then sleeving the coils;
4) the multilayer winding coil (2):
the multilayer winding coil (2) is of an oval layer type structure and is divided into a primary side coil (8) and a secondary side coil (9), during winding, the primary side coil (8) is wound in the left direction, the secondary side coil (9) is wound in the right direction, 33 layers of the primary side coil (8) are wound, 3 layers of the secondary side coil (9) are wound, the coils of all layers are separated by insulating paper, the starting position of the primary side coil (8) is welded with a lead copper bar and used as the input of 333V voltage, and the finishing position of the secondary side coil (9) is welded with the lead copper bar and used as the output of 1000V voltage;
during winding, three layers of cold-drawn strips (10) are arranged between the coils, a bottom support and a Teflon tube are arranged, and epoxy casting is carried out on the whole body;
then taking out the bottom support and the cold-drawing strip (10);
5) wind deflector (3):
and the wind shields (3) are arranged on the outer sides of the two groups of coils.
3. The method for manufacturing the high-impedance single-phase boosting dry-type transformer according to claim 2, wherein the primary side coil (8) is wound by using aluminum foil, and the secondary side coil (9) is wound by using enameled aluminum core flat wire.
4. The method for manufacturing the high-impedance single-phase boosting dry-type transformer according to claim 3, wherein the iron core (1) is formed by laminating 0.27mm silicon steel sheets.
5. The method for manufacturing a high-impedance single-phase step-up dry type transformer according to claim 4, wherein the insulating paper is NOMEX paper.
6. The method for manufacturing a high-impedance single-phase boosting dry-type transformer according to claim 5, wherein a layer of cold-drawn bars (10) is arranged inside the primary side coil (8), a layer of cold-drawn bars (10) is arranged inside the secondary side coil (9), and a layer of cold-drawn bars (10) is arranged between the primary side coil (8) and the secondary side coil (9).
7. The method for manufacturing the high-impedance single-phase boosting dry-type transformer according to claim 6, wherein the number of the cold-drawn bars (10) in each layer is 36, and the 36 cold-drawn bars (10) are uniformly distributed in a ring shape.
8. The method for manufacturing a high-impedance single-phase step-up dry type transformer according to claim 7, wherein in 4) the multi-layer winding coil (2), after taking out the bottom support and the cold-drawing strip (10), the excess paint is removed and the surface defect is repaired.
9. The method for manufacturing a high-impedance single-phase step-up dry-type transformer according to claim 8, wherein six tie rods (6) are used.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911210361.8A CN110993258A (en) | 2019-12-02 | 2019-12-02 | High-impedance single-phase boosting dry-type transformer and manufacturing method thereof |
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| CN201911210361.8A CN110993258A (en) | 2019-12-02 | 2019-12-02 | High-impedance single-phase boosting dry-type transformer and manufacturing method thereof |
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| CN110993258A true CN110993258A (en) | 2020-04-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117831906A (en) * | 2024-03-01 | 2024-04-05 | 上海置信电气有限公司 | Enclosed transformer with hot rod and design method thereof |
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| CN204668093U (en) * | 2015-05-27 | 2015-09-23 | 河南平开电力设备集团有限公司 | Loaded capacity-regulated transformer |
| CN109494052A (en) * | 2018-12-29 | 2019-03-19 | 吴江变压器有限公司 | A kind of testing transformer |
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| CN101064212A (en) * | 2007-03-15 | 2007-10-31 | 辽宁华冶集团发展有限公司 | 35kv 3-phase dry type hollow current-limiting reactor |
| CN201060719Y (en) * | 2007-05-09 | 2008-05-14 | 上海昊德电气有限公司 | Heat radiating structure for phase-shift commutation dry type transformer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117831906A (en) * | 2024-03-01 | 2024-04-05 | 上海置信电气有限公司 | Enclosed transformer with hot rod and design method thereof |
| CN117831906B (en) * | 2024-03-01 | 2024-07-05 | 上海置信电气有限公司 | Enclosed transformer with hot rod and design method thereof |
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Application publication date: 20200410 |