Foil type series structure low-voltage coil

Abstract

The utility model belongs to the technical field of transformer coil winding, and particularly relates to a foil type series structure low-voltage coil, which comprises a first outgoing line copper bar, a second outgoing line copper bar and a coil, and is characterized in that the coil is of a series structure consisting of a plurality of sub-rings and a plurality of middle copper bars, and comprises a first outgoing line terminal ring, a second outgoing line terminal ring and a middle sub-ring, the first wire outlet terminal ring, the second wire outlet terminal ring and the middle sub-ring are foil type coils, and gaps are reserved between the sub-rings. Compared with the prior art, the utility model has the beneficial effects that: 1) the foil-wound low-voltage coil with a segmented series structure is adopted, all sections of foil-wound parts are connected through copper bars, and because no wire turn insulation exists between foil tapes and only interlayer insulation exists between the foil tapes, the insulation proportion is low, and the material cost is saved; the foil winding structure is convenient to operate, manual winding is not needed by means of an automatic foil winding machine, and therefore the winding efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of transformer coil winding, and particularly relates to a foil-type series-connected low-voltage coil. Background Art

[0002] At present, the known low-voltage coils are generally wound by wire or whole foil according to the capacity and current parameters. However, due to the size limitation of the conventional structure of transformer products, the whole foil winding structure cannot be used in small-capacity 100kVA products, and only the wire winding structure can be used. However, since the low-voltage coil contains auxiliary structures such as wire turn insulation and interlayer insulation, the insulation accounts for a high proportion, so the wire-wound coil needs to be wound manually to meet the requirements. Since the winding process requires interlayer climbing, insulation wrapping and other processes, the coil winding efficiency is very low, which seriously affects the production efficiency. Utility Model Content

[0003] The purpose of the utility model is to provide a foil-type series structure low-voltage coil, which overcomes the shortcomings of the prior art and adopts a segmented series structure foil low-voltage coil, which has a simple structure and is easy to operate, reduces the insulation ratio of the coil, saves production costs, and can be operated with the help of a foil winding machine to improve winding efficiency.

[0004] To achieve the above purpose, the utility model is implemented through the following technical solutions:

[0005] A foil-type series structure low-voltage coil comprises a first outgoing copper bar, a second outgoing copper bar and a coil, characterized in that the coil is a series structure composed of multiple sub-coils and multiple intermediate copper bars, comprising a first outgoing terminal circle, a second outgoing terminal circle and an intermediate sub-circle, the first outgoing terminal circle, the second outgoing terminal circle and the intermediate sub-circle are all foil coils, and gaps are left between the sub-circles.

[0006] Furthermore, interlayer insulation is synchronously and correspondingly provided between the foil strips of the first outgoing terminal circle, the second outgoing terminal circle, and the middle sub-circle; and the first outgoing copper bar and the second outgoing copper bar have different lead-out directions.

[0007] Furthermore, the gap is filled with inter-segment insulation.

[0008] Furthermore, the low-voltage coil is suitable for transformer products below 100kVA.

[0009] Furthermore, the number of the intermediate sub-circles is 2-10.

[0010] Furthermore, the foil strip has a width of 20-80 mm and a thickness of 0.3-0.6 mm.

[0011] Furthermore, the thicknesses of the first outgoing copper bar, the second outgoing copper bar and the middle copper bar are the same or different, and the copper bars are connected to the foil strips by welding.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1) The foil-wound low-voltage coil adopts a segmented series structure, and copper bars are used in series between each segment of the foil-wound part. Since there is no wire turn insulation between the foil strips, only interlayer insulation, the insulation ratio is low, which helps to save material costs;

[0014] 2) The foil winding structure is easy to operate and can be assisted by an automatic foil winding machine without manual winding, thereby improving the winding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of an embodiment of the utility model;

[0016] Figure 2 This is a schematic diagram of the appearance structure of an embodiment of the utility model;

[0017] In the figure: 1-first outgoing copper bar, 2-first outgoing terminal circle, 3-middle copper bar on x side, 4-middle sub-circle, 5-middle copper bar on a side, 6-second outgoing terminal circle, 7-second outgoing copper bar, 8-gap. DETAILED DESCRIPTION

[0018] The technical solution of the present utility model will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the specific embodiments required to be used in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the specific embodiments described below are some implementation methods of the utility model. For ordinary technicians in this field, other specific embodiments can be obtained based on these specific embodiments without paying creative work.

[0020] The components of the embodiments of the present invention generally described and shown in the specific embodiments herein can be arranged and designed in countless different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the specific embodiments is not intended to limit the scope of the utility model claimed, but only represents the selected embodiments of the utility model.

[0021] See Figure 1-2, is a schematic structural diagram of an embodiment of a foil-type series structure low-voltage coil of the utility model, comprising a first outlet copper bar 1 (the lead-out direction is marked as a), a second outlet copper bar 7 (the lead-out direction is marked as s) and a coil, the coil is a series structure composed of multiple sub-circles and multiple intermediate copper bars (i.e., the intermediate copper bar 3 on the x side and the intermediate copper bar 5 on the a side), the coil comprises a first outlet terminal circle 2, a second outlet terminal circle 6 and an intermediate sub-circle 4, the first outlet terminal circle 2, the second outlet terminal circle 6 and the intermediate sub-circle 4 are all foil coils, the width of the foil tape is 20-80mm, preferably 60mm, the thickness is 0.3-0.6mm, preferably 0.5mm.

[0022] A gap 8 is left between each sub-coil, and the gap 8 is filled with inter-segment insulation to improve the structural strength of the coil.

[0023] Interlayer insulation is synchronously provided between the foil strips of the first outlet terminal circle 2, the second outlet terminal circle 6, and the middle sub-circle 4 to ensure consistent insulation performance of the transformer product. In the embodiment, the first outlet copper bar 1 and the second outlet copper bar 7 have different lead-out directions, which is convenient for installation and connection.

[0024] The low-voltage coil of the embodiment of the utility model is suitable for transformer products below 100kVA. For transformer products of different powers, the number of the intermediate sub-coils 4 can be selected and matched within the range of 2-10.

[0025] The thickness of the first outgoing copper bar 1, the second outgoing copper bar 7, the x-side middle copper bar 3 and the a-side middle copper bar 5 can be the same or different, preferably the same thickness. The copper bar and the foil strip are connected by welding. The product has a regular appearance and can be mass-produced and efficiently produced with the help of an automatic foil winding machine.

[0026] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A foil-type series-connected low-voltage coil, comprising a first outgoing copper bar, a second outgoing copper bar and a coil, characterized in that: The coil is a series structure composed of multiple sub-coils and multiple intermediate copper bars, including a first outlet terminal circle, a second outlet terminal circle and an intermediate sub-coil. The first outlet terminal circle, the second outlet terminal circle and the intermediate sub-coil are all foil coils, and gaps are left between the sub-coils.

2. A foil-type series structure low-voltage coil according to claim 1, characterized in that: Interlayer insulation is synchronously and correspondingly arranged between the foil strips of the first outlet terminal circle, the second outlet terminal circle and the middle sub-circle; the first outlet copper bar and the second outlet copper bar have different lead-out directions.

3. The foil-type series-connected low-voltage coil according to claim 1, characterized in that: The gap is filled with inter-segment insulation.

4. The foil-type series-connected low-voltage coil according to claim 1, characterized in that: The low-voltage coil is suitable for transformer products below 100kVA.

5. The foil-type series structure low-voltage coil according to claim 1, characterized in that: The number of the intermediate sub-circles is 2-10.

6. The foil-type series-connected low-voltage coil according to claim 2, characterized in that: The foil strip has a width of 20-80 mm and a thickness of 0.3-0.6 mm.

7. The foil-type series structure low-voltage coil according to claim 1, characterized in that: The thicknesses of the first outgoing copper bar, the second outgoing copper bar and the middle copper bar are the same or different, and the copper bars are connected to the foil strips by welding.

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