A continuous pancake coil with air duct and transformer

Abstract

The utility model discloses a continuous pancake coil and transformer with air ducts, including N packages arranged at intervals formed by a plurality of coils, N≥2; N-1 air ducts, the air duct is located between two adjacent packages; the positive pancake line tail of the package located in the outermost layer is connected to the line head of the reverse pancake of the next layer, and the reverse pancake line tail of the package located in the innermost layer is connected to the line head of the positive pancake of the next layer; the horizontal connecting section is located in the area of ​​the air duct; the positive pancake line tail of one package is connected to the positive pancake line head corresponding to the package adjacent to its outer side through the horizontal connecting section; the reverse pancake line tail of one package is connected to the reverse pancake line head corresponding to the package adjacent to its inner side through the horizontal connecting section. The pancake coil of the utility model is divided into a plurality of packages after being wound by an electromagnetic wire, and the adjacent packages are separated by air ducts, so that the heat generated by the pancake coil during operation can be effectively and quickly dissipated, thereby improving the operating reliability of the pancake coil and increasing the service life of the pancake coil.

Description

Technical Field

[0001] The utility model belongs to the technical field of transformers, and in particular relates to a continuous pancake coil with an air duct and a transformer. Background Art

[0002] The circuit part of the transformer has a pancake coil, which is wound by electromagnetic wire. The electromagnetic wire is wound continuously in multiple turns along the radial direction to form a pancake, which is called a wire pancake. The wire pancake is divided into positive pancake and negative pancake. The positive pancake is the electromagnetic wire wound from the inside to the outside, and the negative pancake is wound from the outside to the inside. The winding composed of many wire pancakes arranged along the axial direction is called an envelope.

[0003] The existing patent CN116759210A discloses a pancake-type dry-type transformer with an axial air duct, and its winding requires oblique wires between the air ducts to connect the inner and outer encapsulated wire ends; the disadvantage of this technology is the existence of oblique wires and high air duct voltage; the existing patent CN102693829B discloses a continuous high-voltage coil of a resin-cast dry-type transformer, with an insulating layer between adjacent pancakes; the disadvantage of this technology is that it does not contain an air duct, has poor heat dissipation, and can only be used to make small-capacity products. Utility Model Content

[0004] In order to overcome the above technical defects, the utility model discloses a continuous pancake coil with an air duct and a transformer, aiming to solve at least one problem in the background technology.

[0005] The utility model discloses a continuous pancake coil with an air duct, comprising:

[0006] A plurality of coils, wherein the coils are formed by continuously winding multiple turns of electromagnetic wire in radial direction, and the coils are divided into positive coils and negative coils, and the positive coils and negative coils are continuously and alternately wound to form N interval-arranged packages, where N is greater than or equal to 2;

[0007] N-1 air ducts, each of which is located between two adjacent enclosures;

[0008] Each layer of the electromagnetic wire has a winding section and a horizontal connection section, the winding section is located in the encapsulated area, the end of the encapsulated positive cake located in the outermost layer is connected to the end of the reverse cake of the next layer, and the end of the encapsulated reverse cake located in the innermost layer is connected to the end of the positive cake of the next layer;

[0009] The horizontal connecting section is located in the area of ​​the air duct; the positive cake line tail of one of the packages is connected to the positive cake line head corresponding to the package adjacent to its outer side through the horizontal connecting section; the reverse cake line tail of one of the packages is connected to the reverse cake line head corresponding to the package adjacent to its inner side through the horizontal connecting section.

[0010] Compared with the prior art, the utility model discloses a continuous pancake coil with an air duct, in which the pancake coil is divided into multiple packages, and adjacent packages are separated by air ducts. The multiple packages are continuously wound as one electromagnetic wire, which overcomes the technical problem that the pancake coil with the air duct cannot be wound continuously. The air duct enables the heat generated by the pancake coil during operation to be effectively and quickly dissipated, thereby improving the operating reliability of the pancake coil and increasing the service life of the pancake coil.

[0011] Compared with the traditional dry-type transformer coil, the electromagnetic wire winding structure of the utility model greatly reduces the voltage between the pancakes and the voltage between the air ducts. There is no interval between sections or layers, the electric field is evenly distributed, and the air duct voltage is low. In the past, pancake coils without air ducts could only be used to make small-capacity transformer products due to heat dissipation problems. Now, after adding air ducts, the heat dissipation problem of the transformer is solved, and a large-capacity transformer can be realized, which removes the capacity limitation and greatly improves the versatility and practicality of the transformer.

[0012] In a preferred embodiment, each of the encapsulated wire cakes has the same number of layers.

[0013] In a preferred embodiment, each coil and the electromagnetic wire in the same package have the same number of turns.

[0014] In a preferred embodiment, the wire cakes in each layer are arranged flat and tightly.

[0015] The utility model also discloses a transformer, which comprises the continuous pancake coil with air duct as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 It is a schematic diagram of the structure of a continuous pancake coil with two air ducts;

[0018] Figure 2 It is a schematic diagram of the structure of a continuous pancake coil with an air duct;

[0019] Figure 3 This is a schematic diagram of the structure of a pancake coil wound in multiple sections and multiple layers.

[0020] Description of reference numerals:

[0021] 1-wire coil, 11-positive coil, 12-reverse coil, 13-encapsulation, 14-winding end, 15-horizontal connecting section, 2-air duct. DETAILED DESCRIPTION

[0022] In order to better illustrate the present invention, the present invention is further described in detail below with reference to the accompanying drawings.

[0023] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0024] In order to better illustrate the present invention, the present invention is further described in detail below with reference to the accompanying drawings.

[0025] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. The singular forms of "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0026] Combination Figure 1 and Figure 2 As shown, the utility model discloses a continuous pancake coil with an air duct, comprising:

[0027] A plurality of coils 1, wherein the coils 1 are formed by continuously winding multiple turns of electromagnetic wire in radial direction, and the coils 1 are divided into a positive coil 11 and a negative coil 12, and the positive coil 11 and the negative coil 12 are continuously and alternately wound to form N spaced packages 13, where N is greater than or equal to 2;

[0028] N-1 air ducts 2, each of which is located between two adjacent enclosures 13;

[0029] Each layer of the electromagnetic wire has a winding section 14 and a horizontal connecting section 15, wherein the winding section 14 is located in the area of ​​the envelope 13, the end of the positive cake 11 of the envelope 13 located at the outermost layer is connected to the end of the reverse cake 12 of the next layer, and the end of the reverse cake 12 of the envelope 13 located at the innermost layer is connected to the end of the positive cake 11 of the next layer;

[0030] The horizontal connecting section 15 is located in the area of ​​the air duct 2; the end of the positive cake 11 of one of the packages 13 is connected to the end of the positive cake 11 corresponding to the package 13 adjacent to its outer side through the horizontal connecting section 15; the end of the reverse cake 12 of one of the packages 13 is connected to the end of the reverse cake 12 corresponding to the package 13 adjacent to its inner side through the horizontal connecting section 15.

[0031] Compared with the prior art, the utility model discloses a continuous pancake coil with an air duct, in which the pancake coil is divided into multiple packages 13, and adjacent packages 13 are separated by an air duct 2. Multiple packages 13 are continuously wound as an electromagnetic wire, which overcomes the technical problem that the pancake coil with the air duct 2 cannot be continuously wound. The air duct 2 allows the heat generated by the pancake coil during operation to be effectively and quickly dissipated, thereby improving the operating reliability of the pancake coil and increasing the service life of the pancake coil.

[0032] It should be noted that the position of the electromagnetic wire when it just starts to wind the positive and negative cakes is the wire end of the positive cake and the wire end of the negative cake, and the position of the electromagnetic wire at the end of the positive and negative cakes is the wire end of the positive and negative cakes.

[0033] like Figure 3 As shown, when the pancake coil structure with air duct 2 is wound in multiple sections and multiple layers, the air duct 2 wire is an oblique wire, and the voltage of air duct 2 is the voltage between the sections of the encapsulation 13. Each section has a large number of winding turns. In the multi-section and multi-layer structure, the voltage of air duct 2 needs to consider the voltage between point A and point B, and the entire inner encapsulation coil is connected between point A and point B. Therefore, this voltage is at least greater than the voltage of the entire inner encapsulation 13 coil, and the voltage of air duct 2 is relatively large; Figure 2 As shown, the voltage of the air duct 2 of each layer of the coil 1 in the continuous pancake coil only needs to consider the voltage between point C and point D in the horizontal connecting section 15, without considering the voltage in the envelope 13, and the voltage of the air duct 2 is greatly reduced.

[0034] From a structural point of view, compared with the traditional dry-type transformer coil, the electromagnetic wire winding structure of the utility model has greatly reduced the voltage between the pancakes, the voltage of the air duct 2 is also greatly reduced, there is no interval between sections and layers, the electric field is evenly distributed, and the voltage of the air duct 2 is low. In the past, the pancake coil without the air duct 2 could only be used as a small-capacity transformer product due to heat dissipation problems. Now, after adding the air duct 2, the heat dissipation problem of the transformer is solved, and a large-capacity transformer can be realized, which removes the capacity limitation and greatly improves the versatility and practicality of the transformer.

[0035] In one embodiment, the number of layers of the coils 1 of each of the encapsulations 13 is the same, so that the field strength of the coil is evenly distributed, forming a stable structure, and also facilitating the casting, filling and heat dissipation of the coil.

[0036] In one embodiment, each coil 1 and the electromagnetic wire are wound with the same number of turns in the same package 13. The coil 1 of each package 13 has the same number of layers, so that the field strength of the coil is evenly distributed, forming a stable structure, and also facilitating the casting, filling and heat dissipation of the coil.

[0037] In one embodiment, each layer of the wire cakes 1 is arranged flat and tightly. The continuous pancake coil is a pancake coil that is continuously wound inside and outside, and has no segments, which makes the pancake coil and the transformer using the pancake coil more compact. Compared with the pancake coils that are not continuously wound inside and outside with the same performance, the volume is smaller and the amount of various materials used is also less. In the past, multi-segment and multi-layer pancake coils had welding spots when passing the wire, while the continuous pancake coil with air duct is a continuous alternating winding of positive pancakes 11 and negative pancakes 12. Therefore, there are no welding spots in the continuous pancake coil with air duct, which reduces the risks caused by the welding process and improves the reliability of the coil.

[0038] The utility model also discloses a transformer, which comprises the continuous pancake coil with air duct as described above.

[0039] According to the disclosure and teaching of the above description, the technical personnel in the field to which the utility model belongs can also change and modify the above implementation. Therefore, the utility model is not limited to the specific implementation methods disclosed and described above, and some modifications and changes to the utility model should also fall within the scope of protection of the claims of the utility model. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the utility model.

Claims

1. A continuous pancake coil with air duct, characterized in that: include: A plurality of coils, wherein the coils are formed by continuously winding multiple turns of electromagnetic wire in radial direction, and the coils are divided into positive coils and negative coils, and the positive coils and negative coils are continuously and alternately wound to form N interval-arranged packages, where N is greater than or equal to 2; N-1 air ducts, each of which is located between two adjacent enclosures; Each layer of the electromagnetic wire has a winding section and a horizontal connection section, the winding section is located in the encapsulated area, the end of the encapsulated positive cake located in the outermost layer is connected to the end of the reverse cake of the next layer, and the end of the encapsulated reverse cake located in the innermost layer is connected to the end of the positive cake of the next layer; The horizontal connecting section is located in the area of ​​the air duct; the positive cake line tail of one of the packages is connected to the positive cake line head corresponding to the package adjacent to its outer side through the horizontal connecting section; the reverse cake line tail of one of the packages is connected to the reverse cake line head corresponding to the package adjacent to its inner side through the horizontal connecting section.

2. The continuous pancake coil with air duct according to claim 1, characterized in that: Each of the encapsulated wire cakes has the same number of layers.

3. The continuous pancake coil with air duct according to claim 1, characterized in that: Each coil located in the same package has the same number of turns as the electromagnetic wire.

4. The continuous pancake coil with air duct according to claim 1, characterized in that: The thread cakes in each layer are arranged flat and tightly.

5. A transformer, comprising the continuous pancake coil with air duct as claimed in any one of claims 1 to 4.

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