CN116469655B - High-coupling miniaturized dry-type air-core reactor - Google Patents
High-coupling miniaturized dry-type air-core reactor Download PDFInfo
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- CN116469655B CN116469655B CN202310720612.7A CN202310720612A CN116469655B CN 116469655 B CN116469655 B CN 116469655B CN 202310720612 A CN202310720612 A CN 202310720612A CN 116469655 B CN116469655 B CN 116469655B
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- 238000010168 coupling process Methods 0.000 title claims abstract description 21
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 21
- 235000012771 pancakes Nutrition 0.000 claims abstract description 30
- 239000004744 fabric Substances 0.000 claims abstract description 21
- 230000007246 mechanism Effects 0.000 claims abstract description 19
- 239000002131 composite material Substances 0.000 claims abstract description 13
- 230000008878 coupling Effects 0.000 claims description 7
- 230000017525 heat dissipation Effects 0.000 claims description 7
- 230000002596 correlated effect Effects 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 61
- 238000009413 insulation Methods 0.000 description 15
- 230000002829 reductive effect Effects 0.000 description 9
- 238000004804 winding Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 238000004046 wet winding Methods 0.000 description 5
- 238000005266 casting Methods 0.000 description 4
- 238000005336 cracking Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000001723 curing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000001291 vacuum drying Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
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- 230000008602 contraction Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
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- 238000009826 distribution Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000009422 external insulation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
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Classifications
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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
- H01F27/23—Corrosion protection
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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
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
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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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- Engineering & Computer Science (AREA)
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- Coils Of Transformers For General Uses (AREA)
Abstract
The application discloses a high-coupling miniaturized dry-type air-core reactor, and relates to the technical field of inductors. The dry type air-core reactor is formed by connecting one or more pancake coils in parallel; each pancake coil comprises one or more encapsulated coils, the encapsulated coils are connected in series according to a specified connection mode through a connection mechanism, the connection mechanism comprises pouring stays integrally formed with the encapsulated coils, the pouring stays are of a half-connection structure and are used for expanding the surface distance of the encapsulated coils, and connecting wires among the encapsulated coils are poured inside the pouring stays; the encapsulated coil comprises one or more layer coils connected in series, wherein a vacuum-cast insulating mesh cloth composite insulating layer is arranged between adjacent layer coils and is used for insulating the layer coils.
Description
Technical Field
The application relates to the technical field of inductors, in particular to a high-coupling miniaturized dry-type air-core reactor.
Background
The reactor is used in a power system, and mainly plays roles of compensating capacitive reactive power, limiting switching inrush current, filtering power grid harmonic waves and the like, and can improve the quality of electric energy and ensure safe and stable operation of power equipment. The dry type air core reactor has the characteristics of excellent linearity, strong short circuit resistance, low cost, no maintenance and the like, and has very wide application in power grids with different voltage levels such as power distribution, power transmission, ultra-high voltage alternating current and direct current power transmission and the like.
The current dry type air-core reactor generally adopts a multi-layer cylindrical structure, the product is composed of a star frame arm, envelopes, a stay, a base, a rainproof bird-preventing device and the like, wherein each envelope is formed by connecting multiple layers of cylindrical coils in parallel, a full parallel structure is adopted among the envelopes, besides, a cake-type coil structure is adopted, the dry type air-core reactor is suitable for a dry type air-core reactor product with large inductance and limited occupied space, when the diameter of the coil is large, even 5-10 people are required to jointly implement cake overturning operation, and the process operation difficulty is very large.
In addition, the current dry-type air-core reactor generally adopts a wet winding process, namely, preimpregnated glass fibers are wound and coated on the inner layer and the outer layer of the coil, so that the effects of insulating coating and mechanical reinforcement are achieved, more importantly, ultraviolet rays, moisture erosion and the like are isolated, and the outdoor operation life of the dry-type air-core reactor is ensured. However, the wet winding process mainly winds glass fiber in the circumferential direction, the axial tensile strength of the dry type air-core reactor is insufficient, the support of the inner insulation of the encapsulation is lacking in winding, gaps are difficult to avoid completely in the manufacturing process, and the repetitive action of heat expansion and cold contraction in the outdoor operation is extremely easy to cause the encapsulation to crack and damp, so that the dry type air-core reactor product is broken. According to statistics, more than 90% of faults of the dry air-core reactor are caused by package cracking and damp, and the dry air-core reactor product produced by the current wet winding process has natural defects in weather resistance, cracking resistance and damp-heat resistance.
Meanwhile, the traditional dry type air core reactor is connected into a whole through the stay, the star frame and the binding belt, once any position of a product is damaged, irreversible damage can be caused, and the repairability of the product is poor.
Disclosure of Invention
In order to solve the problems, the application provides a high-coupling miniaturized dry-type air-core reactor, which is formed by connecting one or more pancake coils in parallel;
each pancake coil comprises one or more encapsulated coils, the encapsulated coils are connected in series according to a specified connection mode through a connection mechanism, the connection mechanism comprises pouring stays integrally formed with the encapsulated coils, the pouring stays are of a semi-connection structure and are used for expanding the surface distance of the encapsulated coils, and connecting wires among the encapsulated coils are poured inside the pouring stays;
the encapsulated coil comprises one or more layer-type coils connected in series, wherein a vacuum-cast insulating mesh cloth composite insulating layer is arranged between adjacent layer-type coils and used for insulating the layer-type coils.
In one implementation of the present application, the connection mechanism further includes a suspended air channel;
the suspended air passage is arranged in a cavity formed by the semi-connecting structure of the pouring stay and connected with one side of the pouring stay, and is used for electrically insulating and radiating the encapsulated coil.
In one implementation of the application, the pouring stay and the suspended air passage are respectively arranged at the upper side and the lower side of the connecting mechanism;
the arrangement positions of the pouring stay and the suspended air passage in the adjacent connecting mechanisms are opposite, so that the suspended air passage is arranged on the upper half part and the lower half part of the encapsulated coil in an adjacent mode, and the heat dissipation range of the encapsulated coil is improved.
In one embodiment of the application, in the case of the encapsulated coil consisting of a plurality of layer coils, the zigzag series connection is performed in such a way that the trailing end of the first layer coil is connected to the leading end of the second layer coil.
In one implementation manner of the application, when the encapsulated coil is composed of a plurality of layer coils, the tail end of the third layer coil is connected with the tail end of the fourth layer coil, and the head end of the fourth layer coil which is not connected is connected with the head end of the fifth layer coil, so that U-shaped serial connection is performed;
wherein the fourth layer coil is adjacent to the third layer coil and the fifth layer coil is adjacent to the fourth layer coil.
In one implementation mode of the application, the vacuum insulation grid cloth is uneven in thickness and distributed in a step shape, and the thickness is positively correlated with the field intensity between the layered coils;
one end of the layer coil which is not connected is used as an opening end, the other end of the layer coil is used as a connecting end, and the thickness of the vacuum insulation grid cloth is gradually decreased according to the sequence from the opening end to the connecting end, so that the field intensity between the layer coils is adapted.
In one implementation mode of the application, a fixed base is arranged below the pancake coils and is used for fixedly connecting two vertically adjacent pancake coils;
the fixed base comprises a plurality of non-magnetic stainless steel internal thread hole terminals, and the internal thread hole terminals are connected through equipotential lines and used for fixing potential.
In one implementation of the present application, a side of the inner wire hole terminal facing the pancake coil is arc-shaped to avoid concentration of field intensity generated by the pancake coil by a tip of the inner wire hole terminal.
In one implementation mode of the application, the upper end parts of the cake-type coils in the dry-type air-core reactor are provided with wire inlet terminals, and the lower end parts of the cake-type coils are provided with wire outlet terminals;
the wire inlet terminals and the wire outlet terminals are connected in parallel and are used for leading current into and out of the pancake coil.
In one embodiment of the application, the incoming and outgoing line terminals are distributed along the circumference for reducing the field strength between the layer coils.
The high-coupling miniaturized dry-type air-core reactor provided by the application has the following beneficial effects:
unlike the traditional parallel structure of the cylindrical coil, the high-coupling miniaturized dry-type air-core reactor provided by the embodiment of the application is realized in a radial series connection mode of the small cylindrical coil, and the problems of difficult processing, high cost and poor use manufacturability of the traditional cylindrical structure when the diameter of an electromagnetic wire is too small are solved. The reduction of the inner diameter improves the coupling coefficient and the material utilization rate, so that the volume and the occupied area of the dry type air-core reactor are effectively reduced, the heat dissipation area of the product can be reduced, the temperature rise can be improved on the premise of limited loss, and the material utilization rate can be improved. The multi-pancake coil parallel structure is adopted, so that the modular production and assembly of the dry type air-core reactor are realized, and the repairability of the product is greatly improved. In addition, compared with the traditional wet winding process, the method has the advantages that due to the inherent factors of poor sealing, easiness in cracking and the like, the service life of the reactor is short, the vacuum drying, pouring and curing processes among coils at different levels can be realized through the vacuum insulation grid cloth, the sealing performance and weather resistance of the dry type air-core reactor are effectively improved, and particularly, the service life of the reactor can be remarkably prolonged in high-cold and high-humidity areas.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
fig. 1 is an electrical schematic diagram of a high-coupling miniaturized dry-type air-core reactor provided by an embodiment of the present application;
fig. 2 is a longitudinal section of a structure of a high-coupling miniaturized dry-type air-core reactor according to an embodiment of the present application;
fig. 3 is a schematic diagram of a high coupling miniaturized dry air-core reactor according to an embodiment of the present application;
fig. 4 is a schematic diagram of a coil connection manner according to an embodiment of the present application;
fig. 5 is a top view of a high coupling miniaturized dry air-core reactor according to an embodiment of the present application;
wherein, 1, a pancake coil, 2, an encapsulated coil, 3, a layer coil, 31a, a first layer coil, 32a, a second layer coil, 31b, a third layer coil, 32b, a fourth layer coil, 33, a fifth layer coil, 4, a connecting mechanism, and 5, pouring stay, 6, suspended air passage, 7, insulating grid cloth composite insulating layer, 8, fixed base, 9, internal wire hole terminal, 10, equipotential line, 11, incoming wire terminal, 12, outgoing wire terminal, 13, incoming wire row, 14 and outgoing wire row.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be clearly and completely described below with reference to specific embodiments of the present application and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In addition, in the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
The following describes in detail the technical solutions provided by the embodiments of the present application with reference to the accompanying drawings.
As shown in fig. 1 and 2, the embodiment of the application provides a high-coupling miniaturized dry air-core reactor, which is formed by connecting one or more pancake coils 1 in parallel so as to use the product requirements of large current and large capacity. Each pancake coil 1 includes one or more encapsulated coils 2, and when the number of encapsulated coils 2 is greater than 1, the encapsulated coils 2 are connected in series by a connection mechanism 4 in a prescribed connection manner. The designated connection mode refers to a "U" connection or a "Z" connection, as shown in the connection mode shown in fig. 1, the different encapsulated coils 2 are connected in a "U" manner, that is, the tail end of the encapsulated coil 1 is connected with the tail end of the encapsulated coil 2. If the encapsulated coil 2 is connected in a zigzag shape, the tail end of the encapsulated coil 1 is connected with the head end of the encapsulated coil 2. The connecting mechanism 4 comprises a pouring stay 5 integrally formed with the encapsulated coil 2, the pouring stay 5 is of a semi-connecting structure, and under the condition of limited volume limit, the surface distance of the encapsulated coil 2 can be enlarged, so that the operation safety of the dry-type air-core reactor is improved. The connecting lines between the encapsulated coils 2 are cast inside the cast struts 5. The encapsulated coil 2 comprises one or more serially connected layer coils 3, which layer coils 3 can also be connected in series between different layers of coils by means of a "U" -shaped connection or a "Z" -shaped connection, in the same way as the encapsulated coil 2 is connected. An insulating mesh cloth composite insulating layer 7 which is vacuum cast is arranged between the adjacent layer-type coils 3, and the insulating mesh cloth composite insulating layer 7 is used for insulating the layer-type coils 3.
The high coupling miniaturized dry-type air-core reactor provided by the embodiment of the application is different from the traditional barrel-type coil parallel structure, the high coupling structure between turns is realized by adopting coil combinations of different types and different structures, the limitation of parallel connection is broken through between different coils, the longitudinal volume of the dry-type air-core reactor is effectively reduced by adopting an axial series connection mode, the occupied area is reduced, and the operation difficulty is also reduced. By taking a common series reactor of a national net as an example, the floor area can be reduced by 30 percent, and the weight and cost of a product can be reduced by 20 percent. The multi-pancake coil parallel structure is adopted, so that the modular production and assembly of the dry type air-core reactor are realized, and the repairability of the product is greatly improved. In addition, compared with the traditional wet winding process, due to the inherent factors of poor sealing, easiness in cracking and the like, the service life of the reactor is short, the vacuum drying, casting and curing processes between coils 3 of different levels can be realized through the vacuum casting insulating grid cloth composite insulating layer 7, the sealing performance and weather resistance of the dry air-core reactor are effectively improved, and the service life of the reactor can be remarkably prolonged especially in high-cold and high-humidity areas.
Compared with the traditional casting integrated supporting structure, the semi-connecting structure adopted by the application can effectively improve the surface distance of the encapsulated coil 2 and can also better consider the insulation and heat dissipation requirements of the coil. As shown in fig. 2, the connection mechanism 4 further includes a suspended air channel 6, since the pouring stay 5 is a half-connection structure, that is, the pouring stay 5 occupies only half of the space of the connection mechanism 4, and the remaining half of the space is used for setting the suspended air channel 6. The semi-connection structure of the pouring stay 5 can form a cavity, and the suspended air passage 6 is arranged in the cavity and connected with one side of the pouring stay 5. It should be noted that, the suspended air passage 6 is used as an electrical insulation and heat dissipation channel, and can electrically insulate and dissipate heat of the encapsulated coil 2, and the air passage size can be designed according to practical insulation and heat dissipation requirements, and the common size can be 10mm, 15mm, 19mm and 25mm.
As shown in fig. 3, the pouring stay 5 and the suspended air duct 6 are provided on the upper and lower sides of the connection mechanism, respectively, but the specific arrangement position is not fixed. In the running process of the dry type air-core reactor, the whole encapsulated coil 2 needs to be ensured to be capable of effectively radiating, so that the arrangement positions of the pouring stay 5 and the suspended air channel 6 in the adjacent connecting mechanism 4 are opposite. That is, for the encapsulated coil 2 located at the non-edge of the pancake coil 1, one of the left and right sides is the pouring stay 5, and the other side is the suspended air passage, so that the upper half and the lower half of the encapsulated coil 2 are both adjacently provided with the suspended air passage 6, thereby improving the heat dissipation range of the encapsulated coil 2, and simultaneously, the stability of the coil can be improved by the pouring stays 5 which are arranged in a staggered manner.
In the case of an encapsulated coil 2 composed of a plurality of layer coils 3, the layer coils 3 can be connected in series between the different layers of coils by means of a "U" or "Z" connection. As shown in fig. 4, the zigzag connection is performed such that the tail end of the first layer coil 31a is connected to the head end of the second layer coil 32 a. In the U-shaped connection, as shown in fig. 1, the tail end of the third layer coil 31b is connected to the tail end of the fourth layer coil 32b, and the head end of the fourth layer coil 32b, which is not connected, is connected to the head end of the fifth layer coil 33, thereby performing the U-shaped series connection. The fourth layer coil 32b is adjacent to the third layer coil 31b, and the fifth layer coil 33 is adjacent to the fourth layer coil 32 b. Through the above-mentioned different appointed connected mode, can realize the series connection between a plurality of laminar coils 3, compare in the parallel connection mode of drum formula coil structure outside, can effectively reduce the coil volume to reduce dry-type air core reactor's area.
The insulating layers are arranged between the different layer type coils 3, the insulating layers adopt vacuum insulating grid cloth, and it is required to explain that the layer type coils 3 are of a series structure, and the field intensity at different positions can be different due to the connecting mode, so that the thickness of the insulating grid cloth composite insulating layer 7 is uneven and distributed in a step shape, and the field intensity between the thickness and the layer type coils is positively correlated. That is, the greater the field strength, the greater the thickness of the insulating mesh cloth composite insulating layer 7 is, for achieving a good insulating effect. As shown in fig. 3, the insulating mesh cloth composite insulating layer 7 is provided in a layered manner, and is usually provided in a thickness combination of 2 to 3 stages in consideration of manufacturability. One end of the layer coil 3 which is not connected is used as an opening end, the other end is used as a connecting end, and the thickness of the insulating mesh cloth composite insulating layer 7 is gradually decreased in the sequence from the opening end to the connecting end so as to adapt to the field intensity between the layer coils. In fig. 3, the open end is provided with two layers of vacuum insulation gridding cloth, and then the position adjacent to the connecting end is changed into a layer of vacuum insulation gridding cloth, so that the insulation effect is ensured, and meanwhile, the insulation cost can be effectively reduced.
The dry air-core reactor is formed by coupling and connecting a plurality of pancake coils 1 in parallel, as shown in fig. 2, a fixed base 8 is arranged below each pancake coil 1, and the fixed base 8 is used for fixedly connecting two vertically adjacent pancake coils, so that the stability of the structure is improved. The fixed base 8 comprises a plurality of non-magnetic stainless steel internal wire hole terminals 9, and the internal wire hole terminals 9 are connected through equipotential lines 10 and used for fixing potential, so that the existence of suspended potential is avoided, and the potential discharge hazard is reduced. The inner wire hole terminal 9 is in an arc shape towards one side of the pancake coil and is used for avoiding concentration of field intensity generated by the pancake coil 1 at the tip of the inner wire hole terminal 9, so that the brought discharge and breakdown risks are avoided.
As shown in fig. 2, the upper end portions of the pancake coils 1 in the dry air reactor are provided with inlet wire terminals 11, and the lower end portions thereof are provided with outlet wire terminals 12. The upper end of the outside of cake-type coil 1 is located to inlet wire terminal 11 under the general condition, is located inlet wire row 13, can communicate with outer cake-type coil to utilize the great characteristics of outer coil stray capacitance, be favorable to alleviating the damage of impact overvoltage to coil insulation, reduce inside overvoltage level. The outgoing terminal 12 is positioned at the lower end part of the pancake coil 1 and positioned on the outgoing line row 14, so that current is conveniently led out. In the case where a plurality of pancake coils 1 are connected in parallel, the incoming terminal 11 and the outgoing terminal 12 are correspondingly connected in parallel, so that current is drawn into and out of the pancake coils 1. At this time, as shown in fig. 5, the incoming line terminals 11 and the outgoing line terminals 12 are circumferentially distributed, which is advantageous in reducing the field intensity between the layer coils 3 and improving the reliability. The high-coupling miniaturized dry-type air-core reactor provided by the embodiment of the application does not use a star frame of the traditional dry-type air-core reactor, only retains metal accessories such as a wiring terminal and the like, and has extremely low additional loss.
The specific implementation process of the high-coupling miniaturized dry-type air-core reactor provided by the embodiment of the application is as follows:
(1) Filling a die, selecting a variable die with a proper diameter, installing an air passage positioning plate, debugging, assembling and installing on a winding machine;
(2) Winding a release belt, and uniformly winding the release belt on the surface of the inner die;
(3) Winding vacuum insulation grid cloth with insulation inside the package;
(4) Winding a first layer electromagnetic wire;
(5) Placing an interlayer insulation with different thickness;
(6) Repeating the steps (4) and (5) until the winding of the single encapsulated electromagnetic wire is completed;
(7) Winding and wrapping an external insulation vacuum insulation grid cloth;
(8) Placing a suspended airway rod;
(9) Repeating the steps (3) - (8) until the winding of the last encapsulated coil is completed;
(10) Installing an outer die, welding leads and connecting terminals, and installing a side wiring board;
(11) Vacuum drying the coil;
(12) Vacuum casting of the coil;
(13) Curing the coil at a high temperature;
(14) Removing the coil from the mold;
(15) Polishing, sand blasting, paint spraying and RTV (real time kinematic) treatment on the outer surface of the coil;
(16) Pancake coil assembly (for multi-pancake products).
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.
Claims (7)
1. The high coupling miniaturized dry-type air-core reactor is characterized by comprising one or more pancake coils in parallel connection;
each pancake coil comprises one or more encapsulated coils, the encapsulated coils are connected in series according to a specified connection mode through a connection mechanism, the connection mechanism comprises pouring stays integrally formed with the encapsulated coils, the pouring stays are of a semi-connection structure and are used for expanding the surface distance of the encapsulated coils, and connecting wires among the encapsulated coils are poured inside the pouring stays;
the encapsulated coil comprises one or more layer-type coils connected in series, wherein a vacuum-cast insulating mesh cloth composite insulating layer is arranged between adjacent layer-type coils and is used for insulating the layer-type coils;
the connecting mechanism further comprises a suspended air passage;
the suspended air passage is arranged in a cavity formed by the semi-connecting structure of the pouring stay and connected with one side of the pouring stay, and is used for electrically insulating and radiating the encapsulated coil;
the pouring stay and the suspended air passage are respectively arranged on the upper side and the lower side of the connecting mechanism;
the arrangement positions of the pouring stay and the suspended air passage in the adjacent connecting mechanisms are opposite, so that the suspended air passage is arranged on the upper half part and the lower half part of the encapsulated coil in an adjacent way and is used for improving the heat dissipation range of the encapsulated coil;
the thickness of the insulating mesh cloth composite insulating layer is uneven and distributed in a step shape, and the thickness is positively correlated with the field intensity between the layered coils;
one end of the layer coil which is not connected is used as an opening end, the other end of the layer coil is used as a connecting end, and the thickness of the insulating mesh cloth composite insulating layer is gradually decreased according to the sequence from the opening end to the connecting end, so that the field intensity between the layer coils is adapted.
2. A miniaturized dry air-core reactor according to claim 1, wherein in case the envelope coil is composed of a plurality of layer coils, the zigzag series connection is performed in such a manner that the tail end of the first layer coil is connected to the head end of the second layer coil.
3. The miniaturized dry air-core reactor of claim 1, wherein, in the case that the envelope coil is composed of a plurality of layer coils, the tail end of the third layer coil is connected to the tail end of the fourth layer coil, and the head end of the fourth layer coil which is not connected is connected to the head end of the fifth layer coil, so that the connection in series of the U-shape is performed;
wherein the fourth layer coil is adjacent to the third layer coil and the fifth layer coil is adjacent to the fourth layer coil.
4. The high-coupling miniaturized dry air-core reactor according to claim 1, wherein a fixed base is arranged below the pancake coil and is used for fixedly connecting two vertically adjacent pancake coils;
the fixed base comprises a plurality of non-magnetic stainless steel internal thread hole terminals, and the internal thread hole terminals are connected through equipotential lines and used for fixing potential.
5. The miniaturized dry air-core reactor of claim 4 wherein the inner wire hole terminal is rounded toward the pancake coil side to avoid concentration of field strength generated by the pancake coil at the tip of the inner wire hole terminal.
6. The high-coupling miniaturized dry air-core reactor according to claim 1, wherein the upper ends of the cake-type coils in the dry air-core reactor are provided with wire inlet terminals, and the lower ends thereof are provided with wire outlet terminals;
the wire inlet terminals and the wire outlet terminals are connected in parallel and are used for leading current into and out of the pancake coil.
7. The miniaturized dry air-core reactor of claim 6 wherein the incoming and outgoing terminals are circumferentially distributed for reducing field strength between the layer coils.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310720612.7A CN116469655B (en) | 2023-06-19 | 2023-06-19 | High-coupling miniaturized dry-type air-core reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310720612.7A CN116469655B (en) | 2023-06-19 | 2023-06-19 | High-coupling miniaturized dry-type air-core reactor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116469655A CN116469655A (en) | 2023-07-21 |
| CN116469655B true CN116469655B (en) | 2023-09-01 |
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| WO2021248795A1 (en) * | 2020-06-09 | 2021-12-16 | 吴江变压器有限公司 | Iron core disc for iron core reactor |
| CN213935893U (en) * | 2020-11-20 | 2021-08-10 | 宜兴市兴益特种变压器有限公司 | Control transformer suitable for box transformer substation control cabinet |
| CN216412848U (en) * | 2021-09-08 | 2022-04-29 | 西安合容电力设备有限公司 | Winding structure of dry-type hollow series reactor |
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| CN116469655A (en) | 2023-07-21 |
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