Transformer coil

Abstract

The transformer coil comprises a core body and a winding wire, the winding wire is wound on the core body, the core body comprises a plurality of stacked iron core sections, each iron core section comprises a plurality of stacked silicon steel sheets, each silicon steel sheet is bent into a U shape, and the two ends of each silicon steel sheet are provided with a first connecting part and a second connecting part respectively. The plurality of first connecting parts and the plurality of second connecting parts are mutually connected to form a connecting part, gaps are formed between the first connecting parts and the second connecting parts which are oppositely arranged on the same silicon steel sheet, the plurality of gaps are staggered, hollow parts are formed in the middle parts of the silicon steel sheets, winding wires are wound in the hollow parts of adjacent core bodies, and the winding wires comprise first winding wires, second winding wires and third winding wires; the first winding wire is wound around the core body, the second winding wire is wound on the outer side of the first winding wire, the third winding wire is wound on the outer side of the second winding wire, the first winding wire and the second winding wire are low-voltage winding wires, and the third winding wire is high-voltage winding wire. The utility model is favorable for increasing magnetic flux and improving the performance of the transformer.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to a transformer coil. Background Art

[0002] The transformer coil is one of the core components of the transformer. It is mainly made of wound wires and is used to achieve voltage step-up and step-down conversion. In a transformer, there are usually two or more coils, which are respectively called high-voltage coils and low-voltage coils, or main transformer coils and auxiliary transformer coils. For example, the patent with announcement number CN104700994B discloses a transformer coil, a transformer coil winding method and a transformer, which is formed by forming a first sub-conductor from a part of at least one turn of the wire, and forming a second sub-conductor from another part, and the first sub-conductor is wound onto the first magnetic column, and the second sub-conductor is wound onto the second magnetic column. When the sum of the number of turns of the wires wound on the first magnetic column and the second magnetic column is an odd number of turns, the wires wound on the first magnetic column and the second magnetic column can be effectively balanced, so that the number of turns of the wires wound on the first magnetic column and the second magnetic column is relatively consistent, thereby improving the coupling coefficient of the transformer. The windings of existing transformers are wound on a core, which is usually made of silicon steel sheets. The silicon steel sheets that make up the iron core are first cut into the required shape and size, namely punching sheets, and then the punching sheets are combined in an overlapping manner. However, the above method will produce a certain amount of magnetic flux loss. Utility Model Content

[0003] In order to solve the problems of the prior art, the utility model provides a transformer coil which is beneficial to increasing magnetic flux, improving performance and reducing costs.

[0004] The specific technical solution is as follows: A transformer coil includes a core and a winding, the winding is wound on the core, the core includes several stacked iron core segments, each iron core segment includes several stacked silicon steel sheets, the silicon steel sheets are bent into a U shape, and a first connecting portion and a second connecting portion are respectively provided at both ends of the silicon steel sheet, and several first connecting portions and second connecting portions are interconnected to form an intersection, a gap is formed between the first and second connecting portions of the same silicon steel sheet that are oppositely arranged, and several gaps are staggered to form a hollow portion in the middle of the silicon steel sheet, and windings are wound in the hollow portions of adjacent cores, the windings include a first winding, a second winding and a third winding, the first winding is wound around the core, the second winding is wound on the outside of the first winding, and the third winding is wound on the outside of the second winding, the first and second windings are low-voltage windings, and the third winding is a high-voltage winding.

[0005] In some embodiments, there are four cores, the hollow parts of the first core and the second core have the same width, the hollow parts of the second core and the third core have the same width, and the width of the hollow part of the second core is greater than that of the first core.

[0006] In some embodiments, the width of the first winding is smaller than that of the second winding, and the width of the second winding is smaller than that of the third winding.

[0007] In some embodiments, the first winding and the second winding are made of copper material, and the third winding is made of enameled wire.

[0008] In some embodiments, the cross-sections of the first winding and the second winding are rectangular, and the cross-section of the third winding is circular.

[0009] In some embodiments, there are three core segments, and the junctions of adjacent core segments are staggered.

[0010] The technical effect of the utility model: the utility model has a transformer coil with a small gap between silicon steel sheets and a small magnetic resistance, which is beneficial to increasing the magnetic flux and improving the performance of the transformer; in addition, the use of pure copper wire is reduced, thereby reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of a transformer according to an embodiment of the present utility model.

[0012] Figure 2 This is a schematic diagram of a transformer core according to an embodiment of the present utility model.

[0013] Figure 3 This is a schematic diagram of transformer silicon steel sheet connection according to an embodiment of the present utility model.

[0014] Figure 4 This is a schematic diagram of the silicon steel sheets after connection is completed in an embodiment of the present invention.

[0015] Figure 5 It is a winding schematic diagram of an embodiment of the present utility model. DETAILED DESCRIPTION

[0016] The essential features and advantages of the present invention are further described below with reference to examples, but the present invention is not limited to the examples listed.

[0017] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0018] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like, indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0020] The following is a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0021] like Figures 1 to 5 As shown, a transformer coil of this embodiment includes a core 1 and a winding 2, with the winding 2 wound on the core 1. The core 1 includes a plurality of stacked core segments 3, each of which includes a plurality of stacked silicon steel sheets 4, each of which is bent into a U shape. A first connecting portion 41 and a second connecting portion 42 are respectively provided at each end of the silicon steel sheet 4. The plurality of first connecting portions 41 and second connecting portions 42 are interconnected to form a junction 43. A gap 44 is formed between the first and second connecting portions of the same silicon steel sheet 4, and the plurality of gaps 44 are staggered. A hollow portion 45 is formed in the middle of the silicon steel sheet 4, and the winding 2 is wound in the hollow portion 45 of adjacent cores 1. The winding 2 includes a first winding 21, a second winding 22, and a third winding 23. The first winding 21 is wound around the core 1, the second winding 22 is wound outside the first winding 21, and the third winding 23 is wound outside the second winding 22. The first and second windings are low-voltage windings, and the third winding 23 is a high-voltage winding. In the above technical solution, the gap between the silicon steel sheets is small and the magnetic resistance is small, which is conducive to increasing the magnetic flux; in addition, the first and second windings are wound on the inner ring, and the third winding 23 is set on the outer ring, which can reduce the usage of the first and second windings.

[0022] In this embodiment, there are four core bodies 1. The hollow parts of the first core body 11 and the second core body 12 have the same width, the hollow parts of the second core body 12 and the third core body 13 have the same width, and the width of the hollow part of the second core body 12 is greater than the width of the first core body 11. The width of the hollow part of the first core body 11 is A. Through the above technical solution, the overall size of the core body can be controlled. The width of the first winding 21 is smaller than that of the second winding 22, and the width of the second winding 22 is smaller than that of the third winding 23. The first winding 21 and the second winding 22 are made of copper material, and the third winding 23 is made of enameled wire, so as to reduce the use of copper material and reduce costs. The cross-section of the first winding 21 and the second winding 22 is rectangular, and the cross-section of the third winding 23 is circular. There are three core segments 3, and the junction 43 of adjacent core segments 3 is staggered.

[0023] The transformer coil of this embodiment has a small gap between silicon steel sheets and a small magnetic resistance, which is beneficial to increasing magnetic flux and improving transformer performance; in addition, the use of pure copper wire is reduced, thereby lowering costs.

[0024] It should be noted that the above preferred embodiments are merely illustrative of the technical concepts and features of the present invention. Their purpose is to enable those familiar with the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications based on the spirit of the present invention are intended to fall within the scope of protection of the present invention.

Claims

1. A transformer coil comprising a core and a winding, wherein the winding is wound around the core, characterized in that: The core body includes several stacked iron core segments, each iron core segment includes several stacked silicon steel sheets, the silicon steel sheets are bent into a U shape, and a first connecting portion and a second connecting portion are respectively provided at both ends of the silicon steel sheet. Several first connecting portions and second connecting portions are interconnected to form an intersection, and a gap is formed between the first and second connecting portions of the same silicon steel sheet that are oppositely arranged. Several gaps are staggered, and a hollow portion is formed in the middle of the silicon steel sheet. Windings are wound in the hollow portions of adjacent core bodies, and the windings include a first winding, a second winding and a third winding. The first winding is wound around the core body, the second winding is wound around the outside of the first winding, and the third winding is wound around the outside of the second winding. The first and second windings are low-voltage windings, and the third winding is a high-voltage winding.

2. The transformer coil according to claim 1, characterized in that: There are four core bodies, the hollow parts of the first core body and the second core body have the same width, the hollow parts of the second core body and the third core body have the same width, and the width of the hollow part of the second core body is greater than that of the first core body.

3. The transformer coil according to claim 2, characterized in that: The width of the first winding is smaller than that of the second winding, and the width of the second winding is smaller than that of the third winding.

4. The transformer coil according to claim 3, characterized in that: The first winding wire and the second winding wire are made of copper material, and the third winding wire is made of enameled wire.

5. The transformer coil according to claim 4, characterized in that: The cross sections of the first winding and the second winding are rectangular, and the cross section of the third winding is circular.

6. The transformer coil according to claim 5, characterized in that: There are three core segments, and the junctions of adjacent core segments are staggered.

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