CN209168903U - A kind of winding construction and transformer - Google Patents

Abstract

The utility model discloses a winding structure and a transformer, wherein the winding structure comprises a first coil, a second coil and a third coil, the second coil is located between the first coil and the third coil, and is respectively connected with the first coil and the third coil. The coils are connected, the distances between the first coil and the third coil are equal to the second coil respectively, the first coil and the third coil are respectively arranged to the second coil according to the preset interval, and the adjacent first coil and phase The height difference between adjacent third coils is a first preset threshold. In the winding structure of the present invention, by arranging the first coil, the second coil and the third coil into an isosceles triangle or an isosceles trapezoid, the heights of the first coil and the third coil have a certain gradient, which can To a large extent, the field strength at the end of the winding structure is reduced, so that the breakdown phenomenon of insulating objects in the winding structure can be avoided, thereby enhancing the electrical performance of the winding structure.

Description

A winding structure and transformer

technical field

The utility model relates to the technical field of transformers, in particular to a winding structure and a transformer.

Background technique

A winding, commonly known as a coil, is a group of turns that constitute an electrical circuit corresponding to a certain voltage value marked on the transformer. Therefore, the winding is an important part of the transformer, and the transformer is a device that uses the principle of electromagnetic induction to change the AC voltage. The main components are high-voltage windings, low-voltage windings and iron cores (magnetic cores). Different winding structures have different electrical properties. Therefore, rationally setting the winding structure plays an important role in the safe and reliable operation of the transformer and other power electronic devices with the winding structure.

At present, the conventional winding structure in the prior art generally sets the height of each coil to the same height, so that all coils of the winding are arranged in a rectangular area. Since the top angle of the rectangular area is a right angle of 90 degrees, The end of the winding structure is not a smooth transition, so a large field intensity will be distributed around both sides of a right angle of 90 degrees, which will lead to an increase in the field intensity at the end of the winding structure. Large field strengths can easily break down insulating objects.

Utility model content

Therefore, the technical problem to be solved by the embodiments of the present invention lies in the winding structure in the prior art. The coils wound in the winding structure are all set to the same height to form a rectangular area, resulting in an increase in the field strength at the end of the winding structure, which is easy to Causes the breakdown of insulating objects in the winding structure.

To this end, the embodiments of the present utility model provide the following technical solutions:

An embodiment of the present invention provides a winding structure, comprising a first coil, a second coil and a third coil, the second coil is located between the first coil and the third coil, and is respectively connected with the first coil and the third coil. A coil is connected to the third coil, the distances between the first coil and the third coil are equal to the second coil, respectively, and the first coil and the third coil are in sequence according to preset The intervals are arranged toward the second coils, and the height difference between the adjacent first coils and the adjacent third coils is a first preset threshold.

Optionally, the number of the second coils is at least one turn.

Optionally, the number of the first coils and the third coils sequentially arranged to the second coils at preset intervals is equal.

Optionally, the distance between the first coil of the first coil and the third coil arranged to the second coil in sequence according to a preset interval and the second coil is a second preset threshold. .

Optionally, the height difference between the first coil of the first coil and the third coil arranged to the second coil in sequence according to a preset interval and the second coil is a third predetermined value. Set the threshold.

Optionally, the ratio of the second preset threshold to the third preset threshold is 2-2.5.

Optionally, the arrangement area formed by the first coil, the second coil and the third coil is an isosceles trapezoid or an isosceles triangle.

An embodiment of the present invention provides a transformer, comprising: the winding structure, the winding structure is used as a high-voltage winding of the transformer, and the high-voltage winding is used to output a first voltage;

a low-voltage winding for outputting a second voltage;

An insulating object, which is located between the high voltage winding and the low voltage winding, is used to generate insulation resistance.

Optionally, the distance between the high-voltage winding and the low-voltage winding is 9mm-15mm.

Optionally, the height ratio between the high voltage winding and the low voltage winding is 0.8-1.3.

The technical solution of the embodiment of the present utility model has the following advantages:

The utility model provides a winding structure and a transformer, wherein the winding structure includes a first coil, a second coil and a third coil, and the second coil is located between the first coil and the third coil, and is respectively connected with the first coil and the third coil. The coils are connected, the distances between the first coil and the third coil are equal to the second coil respectively, the first coil and the third coil are respectively arranged to the second coil according to the preset interval, and the adjacent first coil and phase The height difference between adjacent third coils is a first preset threshold. In the winding structure of the present invention, by arranging the first coil, the second coil and the third coil into an isosceles triangle or an isosceles trapezoid, the heights of the first coil and the third coil have a certain gradient, which can To a large extent, the field strength at the end of the winding structure is reduced, so that the breakdown phenomenon of insulating objects in the winding structure can be avoided, thereby enhancing the electrical performance of the winding structure.

Description of drawings

In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the following descriptions The accompanying drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

1 is a first schematic diagram of a winding structure in an embodiment of the present invention;

Fig. 2 is the second schematic diagram of the winding structure in the embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a transformer in an embodiment of the present invention.

Reference number:

1-winding structure; 11-first coil; 12-second coil; 13-third coil;

2-Transformer; 21-High Voltage Winding; 22-Low Voltage Winding; 23-Insulating Object.

Detailed ways

The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", " The orientation or positional relationship indicated by "outside" is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific Orientation, construction and operation in a particular orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the embodiments of the present utility model, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection or a It is a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, or it can be the internal connection of two components, it can be wireless connection, or Can be a wired connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as there is no conflict with each other.

Example 1

An embodiment of the present invention provides a winding structure 1 , as shown in FIG. 1 , the winding structure 1 includes a first coil 11 , a second coil 12 and a third coil 13 respectively.

The second coil 12 is located between the first coil 11 and the third coil 13 and is connected to the first coil 11 and the third coil 13 respectively. In FIG. 1 , it is seen that the first coil 11 is located on the left side of the second coil 12 , the third coil 13 is located on the right side of the second coil 12 , and the height of the second coil 12 is higher than that of the first coil 11 and the third coil 13 . The height is high, and the distances between the first coil 11 and the third coil 13 and the second coil 12 are equal. The first coil 11, the second coil 12 and the third coil 13 may respectively represent a multi-turn coil. For example: in FIG. 1 , the first coil 11 may represent the 11th coil or the 12th coil, and the third coil 13 may represent the 21st coil or the 22nd coil.

In FIG. 1 , the first coils 11 and the third coils 13 are respectively arranged to the second coil 12 at preset intervals, and the height difference between the adjacent first coils 11 and the adjacent third coils 13 is the first a preset threshold. That is, in Figure 1, coil No. 11, Coil No. 12, Coil No. 13, Coil No. 14, Coil No. 15, Coil No. 21, Coil No. 22, Coil No. 23, Coil No. 24 and Coil No. 25 follow the same preset The intervals are sequentially arranged toward the second coils 12 , that is, the intervals between the adjacent first coils 11 and the adjacent third coils 13 are the same. In FIG. 1 , it can be seen that the height difference between the adjacent first coils 11 and the adjacent third coils 13 is the first preset threshold, that is, the height difference between the adjacent first coils 11 and the adjacent third coils 13 is the first preset threshold value. The height difference is equal. In FIG. 1 , the first preset threshold is Δx.

In the winding structure 1 in the embodiment of the present invention, the number of the second coil 12 may be 1 turn, 2 turns, or 3 turns and other multiple turns. In FIG. 1 , the number of the second coil 12 is one turn, and in FIG. 2 , the number of the second coil 12 is multiple turns. When the number of the second coils 12 is multiple turns, the heights of the second coils 12 of each turn are equal, and the intervals between adjacent second coils 12 are also equal.

In the winding structure 1 in the embodiment of the present invention, the number of the first coils 11 and the third coils 13 arranged on the second coil 12 in sequence according to a preset interval is equal. In FIG. 1 or FIG. 2 , the number of the first coils 11 and the third coils 13 arranged sequentially to the second coil 12 according to the preset interval is equal, that is, the number of the first coils 11 and the third coil 13 arranged sequentially to the second coil 12 according to the preset interval is equal. The length of the side formed by one coil 11 is equal to the length of the side formed by the third coils 13 arranged sequentially to the second coil 12 at preset intervals. It can be seen from this that in FIG. The arrangement areas of the three coils 13 and the second coils 12 form an isosceles triangle. In FIG. 2 , an equal number of the first coils 11 and the third coils 13 and the arrangement areas of the second coils 12 form an isosceles trapezoid. It can be seen that, compared with the rectangular area, the winding structure 1 forming the isosceles triangle or isosceles trapezoid arrangement area, because the ends of the winding structure 1 are equally distributed, to a large extent, a certain field intensity distribution can be reduced, and further The larger electric field strength is avoided to break down the insulating objects arranged in the winding structure 1 , that is, the electrical performance of the winding structure 1 is improved.

In the winding structure 1 in the embodiment of the present invention, the distance between the first coil and the second coil 12 of the first coil 11 and the third coil 13 arranged in sequence to the second coil 12 according to the preset interval is the second preset distance. Set the threshold. In FIG. 1 or FIG. 2 , the first coil of the first coil 11 is a coil of size 11, and the first coil of the third coil 13 is a coil of size 21. In FIG. 1 , the second preset threshold between the No. 11 coil or No. 21 coil and the No. 31 coil of the second coil 12 is a, and a can be regarded as the No. 11 coil or No. 21 coil and the second coil of the winding structure 1 . The horizontal distance between the 31-gauge coils of 12.

In the winding structure 1 in the embodiment of the present invention, the height difference between the first coils of the first coils 11 and the third coils 13 and the second coils 12 respectively arranged to the second coil 12 at preset intervals is the third Preset threshold. In FIG. 1 or FIG. 2 , the first coil of the first coil 11 is a coil of size 11, and the first coil of the third coil 13 is a coil of size 21. In FIG. 1 , the height difference between the height of the No. 11 coil or the No. 21 coil and the height of the No. 31 coil of the second coil 12 is b. In FIG. 1 or FIG. 2 , b is the third preset threshold, and b can be considered as The vertical distance between the top of the No. 11 or No. 21 coil of the winding structure 1 and the top of the No. 31 coil of the second coil 12 .

In the winding structure 1 in the embodiment of the present invention, the ratio of the second preset threshold value to the third preset threshold value is 2-2.5, which can optimize the electric field intensity distribution and achieve better electrical performance.

In the winding structure 1 in the embodiment of the present invention, the first coil 11 and the third coil 13 are formed by forming an isosceles triangle or an isosceles trapezoid in the arrangement area of the first coil 11 , the second coil 12 and the third coil 13 . The second coils 12 are arranged in sequence at preset intervals, so that the heights of the first coils 11 and the third coils 13 have a certain gradient, which can greatly reduce the field strength at the ends of the winding structure 1, and can The breakdown phenomenon of the insulating objects in the winding structure 1 is avoided, thereby enhancing the electrical performance of the winding structure 1 .

Example 2

The embodiment of the present invention provides a transformer 2. The transformer 2 is a widely used power electronic device, which mainly plays the role of voltage transformation or electrical isolation, such as a high-frequency transformer, which mainly plays the role of electrical isolation, voltage transformation and The role of transmission power. As shown in Figure 3, the transformer 2 in this embodiment includes:

Including the winding structure 1 in Embodiment 1, the winding structure 1 is used as the high-voltage winding 21 of the transformer 2, and the high-voltage winding 21 is used to output the first voltage. The high-voltage winding 21 here is usually the high-voltage side of the transformer 2, so the high-voltage winding 21 outputs The first voltage is high voltage.

The low-voltage winding 22 is used to output the second voltage; the low-voltage winding 22 here is equivalent to the low-voltage side of the transformer 2 , so the second point voltage output by the low-voltage winding 22 is low-voltage, and the low-voltage winding 22 is usually located inside the high-voltage winding 21 .

An insulating object 23, which is located between the high voltage winding 21 and the low voltage winding 22, is used to generate insulation resistance. The purpose of generating the insulation resistance of the insulating object 23 is to isolate the voltage between the high-voltage winding 21 and the low-voltage winding 22 . In the prior art, in order to share the larger field strength generated between the high-voltage winding 21 and the low-voltage winding 22, a larger-sized insulating object 23 is usually selected. Obviously, a larger-sized insulating object 23 will lead to a larger structure of the transformer 2. , the volume is higher and the cost is higher, so if the high-voltage winding 21 of the transformer 2 in this embodiment is set to the winding structure 1 in the embodiment 1, to a large extent, the high-voltage winding 21 and the low-voltage winding 22 can be reduced. Therefore, the distance between the insulating objects 23 is further shortened, the outer size of the transformer is reduced, and the manufacturing cost of the transformer is reduced.

In the transformer 2 in the embodiment of the present invention, the distance between the high-voltage winding 21 and the low-voltage winding 22 is 9mm-15mm. When the distance between the high-voltage winding 21 and the low-voltage winding 22 is set to 9mm-15mm, the high-voltage winding 21 and the low-voltage winding 22 of the transformer 2 can be made more compact, which further reduces the overall volume of the transformer 2 and reduces the manufacturing of the transformer 2. cost.

In the transformer 2 in the embodiment of the present invention, the height ratio between the high-voltage winding 21 and the low-voltage winding 22 is 0.8-1.3. In FIG. 3, the height of the high-voltage winding 21 is f, the height of the low-voltage winding 22 is e, the height ratio between the high-voltage winding 21 and the low-voltage winding 22 is f/e, and the height ratio between the low-voltage winding 22 and the high-voltage winding 21 is e/f . f/e or e/f can make the heights of the high-voltage winding 21 and the low-voltage winding 22 of the transformer 2 relatively close. As a preferred embodiment, when the height ratio between the high-voltage winding 21 and the low-voltage winding 22 is 0.95, it can be The local field strength of the transformer 2 is the smallest, so that the leakage inductance and loss of the transformer 2 are minimized.

The transformer 2 in the embodiment of the present invention further includes, and further includes a first iron core, a second iron core, a first insulating layer and a second insulating layer, wherein the first insulating layer is located between the high-voltage winding 21 and the first iron core. Between the cores, the second insulating layer is located between the low-voltage winding 22 and the second iron core.

In the transformer 2 in the embodiment of the present invention, the high-voltage winding 21 and the low-voltage winding 22 are made of copper foil, and the number of the high-voltage winding 21 and the low-voltage winding 22 can be set according to user needs.

To sum up, in the transformer 2 in the embodiment of the present invention, by setting the high-voltage winding 21 into the winding structure 1 with a certain gradient, the field between the high-voltage winding 21 and the low-voltage winding 22 of the transformer 2 can be reduced to a large extent. Therefore, the transformer 2 in this embodiment can enhance the electrical insulation performance and service life of the transformer. , so that the transformer 2 can operate safely for a long time.

Obviously, the above-mentioned embodiments are only examples for clear description, and are not intended to limit the implementation manner. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. And the obvious changes or changes derived from this are still within the protection scope of the present invention.

Claims (10)

1. A winding structure comprising a first coil, a second coil and a third coil, wherein the second coil is located between the first coil and the third coil and is respectively connected with the first coil and the third coil. The third coil connection is characterized in that the distances between the first coil and the third coil and the second coil are respectively equal, and the first coil and the third coil are in sequence according to the preset The intervals are arranged toward the second coils, and the height difference between the adjacent first coils and the adjacent third coils is a first preset threshold. 2 . The winding structure of claim 1 , wherein the number of the second coils is at least one turn. 3 . 3 . The winding structure according to claim 2 , wherein the number of the first coils and the third coils arranged sequentially to the second coil according to a preset interval is equal. 4 . 4 . The winding structure according to claim 3 , wherein the first coils of the first coils and the third coils arranged to the second coils in sequence according to preset intervals are respectively connected to the first coils of the first coils and the first coils of the third coils. 5 . The distance between the two coils is the second preset threshold. 5 . The winding structure according to claim 4 , wherein the first coils of the first coil and the third coil arranged in sequence to the second coil according to preset intervals are respectively the same as the first coils of the second coils. 6 . The height difference of the second coil is a third preset threshold. 6 . The winding structure according to claim 5 , wherein the ratio of the second preset threshold to the third preset threshold is 2-2.5. 7 . 7. The winding structure according to any one of claims 1-6, wherein the arrangement area formed by the first coil, the second coil and the third coil is an isosceles trapezoid or an isosceles triangle. 8. A transformer, characterized in that, comprising: The winding structure according to any one of claims 1-7, wherein the winding structure is used as a high-voltage winding of the transformer, and the high-voltage winding is used to output a first voltage; a low-voltage winding for outputting a second voltage; An insulating object, which is located between the high voltage winding and the low voltage winding, is used to generate insulation resistance. 9 . The transformer according to claim 8 , wherein the distance between the high-voltage winding and the low-voltage winding is 9mm-15mm. 10 . 10. The transformer according to any one of claims 8-9, wherein the height ratio between the high-voltage winding and the low-voltage winding is 0.8-1.3.