CN109346291B - Winding structure and transformer - Google Patents

Abstract

The invention 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 positioned between the first coil and the third coil and is respectively connected with the first coil and the third coil, the distances between the first coil and the third coil are respectively equal to the distances between the second coil, the first coil and the third coil are respectively distributed to the second coil according to preset intervals in sequence, and the height difference value between the adjacent first coil and the adjacent third coil is a first preset threshold value. According to the winding structure, the arrangement areas of the first coil, the second coil and the third coil form an isosceles triangle or an isosceles trapezoid, so that the heights of the first coil and the third coil have a certain gradient, the field intensity at the end part of the winding structure can be reduced to a great extent, the breakdown phenomenon of an insulating object in the winding structure can be avoided, and the electrical performance of the winding structure is further enhanced.

Description

Winding structure and transformer

Technical Field

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

Background

The winding, commonly known as a coil, is a group of turns of an electrical circuit corresponding to a certain voltage value marked by a transformer. Therefore, the winding is an important component of the transformer, which is a device for changing the ac voltage by using the principle of electromagnetic induction, and the main components are a high-voltage winding, a low-voltage winding and an iron core (magnetic core). The structure of the winding is different, and the generated electrical performance is also different, so that the reasonable structure of the winding plays an important role in the safe and reliable operation of a transformer and other power electronic devices with the winding structure in a power system.

The traditional winding structure in the prior art generally sets the height of each turn of coil to be the same, so that all coils of the winding are arranged into a rectangular area, as the top angle of the rectangular area is a right angle of 90 degrees, the end part of the winding structure is not in smooth transition, and larger field intensity is distributed around two sides of the right angle of 90 degrees, namely, the field intensity of the end part of the winding structure is increased, and if an insulating object is arranged in the winding, obviously, the larger field intensity is easy to break through the insulating object.

Disclosure of Invention

Therefore, the technical problem to be solved by the embodiment of the invention is that 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, so that the field intensity of the end part of the winding structure is increased, and the breakdown phenomenon of an insulating object in the winding structure is easy to occur.

Therefore, the embodiment of the invention provides the following technical scheme:

the embodiment of the invention provides a winding structure, which comprises a first coil, a second coil and a third coil, wherein the second coil is positioned between the first coil and the third coil and is respectively connected with the first coil and the third coil, the distances between the first coil and the third coil and the second coil are respectively equal, the first coil and the third coil are respectively distributed to the second coil according to preset intervals, and the height difference value between the adjacent first coil and the adjacent third coil is a first preset threshold value.

Optionally, the number of the second coils is at least 1 turn.

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

Optionally, the distances between the first coils of the first coils and the third coils, which are sequentially arranged to the second coils at preset intervals, and the second coils are respectively a second preset threshold value.

Optionally, the difference between the heights of the first coil and the second coil, which are sequentially arranged to the second coil at preset intervals, of the first coil and the third coil, respectively, is a third preset 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 isosceles trapezoid or isosceles triangle.

An embodiment of the present invention provides a transformer, including: the winding structure is used as a high-voltage winding of the transformer, and the high-voltage winding is used for outputting a first voltage;

a low voltage winding for outputting a second voltage;

an insulating object located between the high voltage winding and the low voltage winding for creating an insulation resistance.

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

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

The technical scheme of the embodiment of the invention has the following advantages:

the invention provides 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 positioned between the first coil and the third coil and is respectively connected with the first coil and the third coil, the distances between the first coil and the third coil are respectively equal to the distances between the second coil, the first coil and the third coil are respectively distributed to the second coil according to preset intervals in sequence, and the height difference value between the adjacent first coil and the adjacent third coil is a first preset threshold value. According to the winding structure, the arrangement areas of the first coil, the second coil and the third coil form an isosceles triangle or an isosceles trapezoid, so that the heights of the first coil and the third coil have a certain gradient, the field intensity at the end part of the winding structure can be reduced to a great extent, the breakdown phenomenon of an insulating object in the winding structure can be avoided, and the electrical performance of the winding structure is further enhanced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a first schematic diagram of a winding structure according to an embodiment of the present invention;

FIG. 2 is a second schematic diagram of a winding structure according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a transformer according to an embodiment of the invention.

Reference numerals:

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

a 2-transformer; 21-high voltage winding; 22-low voltage winding; 23-insulating objects.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the 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," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the embodiments of the present invention and simplify 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 invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In describing embodiments of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, or can be communicated inside the two components, or can be connected wirelessly or in a wired way. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

Example 1

The embodiment of the invention provides a winding structure 1, as shown in fig. 1, the winding structure 1 comprises a first coil 11, a second coil 12 and a third coil 13.

Wherein 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 positioned at the left side of the second coil 12, the third coil 13 is positioned at the right side of the second coil 12, the height of the second coil 12 is higher than the heights of the first coil 11 and the third coil 13, and the distances between the first coil 11 and the third coil 13 and the second coil 12 are equal, respectively. The first coil 11, the second coil 12 and the third coil 13 may represent multi-turn coils, respectively. For example: in fig. 1, the first coil 11 may represent a number 11 coil or a number 12 coil, and the third coil 13 may represent a number 21 coil or a number 22 coil.

In fig. 1, the first coil 11 and the third coil 13 are sequentially arranged toward the second coil 12 at preset intervals, respectively, and the difference in height between the adjacent first coil 11 and the adjacent third coil 13 is a first preset threshold. That is, in fig. 1, the number 11 coil, the number 12 coil, the number 13 coil, the number 14 coil, the number 15 coil, and the number 21 coil, the number 22 coil, the number 23 coil, the number 24 coil, and the number 25 coil are sequentially arranged to the second coil 12 at the same preset interval, that is, the interval between the adjacent first coil 11 and the adjacent third coil 13 is the same. In fig. 1, it is seen that the difference in height between the adjacent first coil 11 and the adjacent third coil 13 is a first preset threshold, i.e., the difference in height between the adjacent first coil 11 and the adjacent third coil 13 is equal. In fig. 1, the first preset threshold is Δx.

In the winding structure 1 in the embodiment of the invention, the number of the second coils 12 can be 1 turn, 2 turns, 3 turns and other multi-turns. Fig. 1 shows a number of 1 turn of the second coil 12, and in fig. 2, the number of the second coil 12 is a plurality of turns. When the number of the second coils 12 is a plurality of turns, the heights of the second coils 12 of each turn are equal, and the intervals between the adjacent second coils 12 are also equal.

The winding structure 1 in the embodiment of the present invention has the same number of the first coils 11 and the third coils 13 sequentially arranged to the second coils 12 at preset intervals. In fig. 1 or fig. 2, the number of the first coils 11 and the third coils 13 arranged sequentially to the second coils 12 at preset intervals is equal, that is, the side length of the first coils 11 arranged sequentially to the second coils 12 at preset intervals is equal to the side length of the third coils 13 arranged sequentially to the second coils 12 at preset intervals, so that it is seen that in fig. 1, the arrangement areas of the first coils 11 and the third coils 13 and the second coils 12, which are equal in number, form an isosceles triangle, and in fig. 2, the arrangement areas of the first coils 11 and the third coils 13, which are equal in number, and the plurality of second coils 12 form an isosceles trapezoid. Therefore, compared with the rectangular local area, the winding structure 1 forming the isosceles triangle or isosceles trapezoid arrangement area has the advantages that the end parts of the winding structure 1 are distributed in an equidifference manner, so that a certain field intensity distribution can be reduced to a great extent, and further, the situation that a larger field intensity breaks through an insulating object arranged in the winding structure 1 can be avoided, namely, 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 11 and the second coil 12 of the first coil 11 and the third coil 13, which are sequentially arranged to the second coil 12 at preset intervals, is a second preset threshold. In fig. 1 or fig. 2, the first coil of the first coil 11 is the No. 11 coil, and the first coil of the third coil 13 is the No. 21 coil. In fig. 1, the second preset threshold value between the 11 # coil or the 21 # coil and the 31 # coil of the second coil 12 is a, which can be regarded as the horizontal distance between the 11 # coil or the 21 # coil of the winding structure 1 and the 31 # coil of the second coil 12.

In the winding structure 1 in the embodiment of the present invention, the difference between the heights of the first coil 11 and the first coil 13, which are sequentially arranged to the second coil 12 at preset intervals, and the second coil 12 is a third preset threshold. In fig. 1 or fig. 2, the first coil of the first coil 11 is the No. 11 coil, and the first coil of the third coil 13 is the No. 21 coil. The difference in height between the 11-th coil or 21-th coil and the 31-th coil of the second coil 12 in fig. 1 is b, and in fig. 1 or 2 b is a third preset threshold, b may be regarded as the vertical distance between the top end of the 11-th coil or 21-th coil of the winding structure 1 and the top end of the 31-th coil of the second coil 12.

According to the winding structure 1 provided by the embodiment of the invention, the ratio of the second preset threshold value to the third preset threshold value is 2-2.5, so that the electric field intensity distribution is optimal, and better electrical performance is realized.

According to the winding structure 1 provided by the embodiment of the invention, the arrangement areas of the first coil 11, the second coil 12 and the third coil 13 form an isosceles triangle or an isosceles trapezoid, and the first coil 11 and the third coil 13 are sequentially arranged towards the second coil 12 according to the preset interval, so that the heights of the first coil 11 and the third coil 13 have a certain gradient, the field intensity at the end part of the winding structure 1 can be reduced to a great extent, the breakdown phenomenon of an insulating object in the winding structure 1 can be avoided, and the electrical performance of the winding structure 1 is further enhanced.

Example 2

The embodiment of the invention provides a transformer 2, wherein the transformer 2 is a power electronic device with wider application and mainly plays a role in transformation or electrical isolation, for example: the high-frequency transformer mainly plays roles of electric isolation, transformation and power transmission in the flexible transformer substation. As shown in fig. 3, the transformer 2 in the present embodiment includes:

the winding structure 1 of embodiment 1 is included, the winding structure 1 is used as the high-voltage winding 21 of the transformer 2, the high-voltage winding 21 is used for outputting the first voltage, and the high-voltage winding 21 is usually the high-voltage side of the transformer 2, so the first voltage output by the high-voltage winding 21 is the high voltage.

A low voltage winding 22 for outputting a second voltage; the low-voltage winding 22 corresponds to the low-voltage side of the transformer 2, so the second-point voltage output from 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, for generating an insulation resistance. The insulating object 23 creates an insulation resistance for isolating 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 intensity generated between the high-voltage winding 21 and the low-voltage winding 22, a larger-sized insulating object 23 is generally selected, and obviously, the larger-sized insulating object 23 leads to a larger structure, a higher volume and a larger cost of the transformer 2, so if the high-voltage winding 21 of the transformer 2 in the embodiment is set to the winding structure 1 in the embodiment 1, the field intensity between the high-voltage winding 21 and the low-voltage winding 22 can be reduced to a great extent, the distance between the insulating object 23 is further shortened, the overall size of the transformer is reduced, and the manufacturing cost of the transformer is reduced.

In the transformer 2 of the embodiment of the 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 be 9mm-15mm, the high-voltage winding 21 and the low-voltage winding 22 of the transformer 2 can be made more compact, the whole volume of the transformer 2 is further reduced, and the manufacturing cost of the transformer 2 is also reduced.

In the transformer 2 of 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 of the high voltage winding 21 to the low voltage winding 22 is f/e, and the height ratio of the low voltage winding 22 to the high voltage winding 21 is e/f. The height ratio between the high-voltage winding 21 and the low-voltage winding 22 of the transformer 2 can be relatively close to each other by f/e or e/f, and when the height ratio between the high-voltage winding 21 and the low-voltage winding 22 is 0.95, the local field intensity of the transformer 2 can be minimized, and the leakage inductance and loss of the transformer 2 can be minimized.

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

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

In summary, in the transformer 2 according to the embodiment of the present invention, by setting the high-voltage winding 21 to have the winding structure 1 with a certain gradient, the field intensity between the high-voltage winding 21 and the low-voltage winding 22 of the transformer 2 can be reduced to a great extent, and the potential safety hazard caused by the breakdown phenomenon of the insulating object 23 between the high-voltage winding 21 and the low-voltage winding 22 due to the excessive local field intensity is avoided, so that the electrical insulation performance and the service life of the transformer can be enhanced by the transformer 2 according to the embodiment, and the transformer 2 can be further safely operated for a long time.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.

Claims (10)

1. The winding structure comprises a first coil, a second coil and a third coil, wherein the second coil is positioned between the first coil and the third coil and is respectively connected with the first coil and the third coil; the first coil comprises a number 11 coil, a number 12 coil, a number 13 coil, a number 14 coil and a number 15 coil, the third coil comprises a number 21 coil, a number 22 coil, a number 23 coil, a number 24 coil and a number 25 coil, and the second coil comprises a number 31 coil.

2. The winding structure according to claim 1, wherein the number of the second coils is at least 1 turn.

3. The winding structure according to claim 2, wherein the number of the first coils and the number of the third coils which are sequentially arranged to the second coils at a predetermined interval are equal.

4. A winding structure according to claim 3, wherein the distance between the first coil of the first coil and the third coil, which are sequentially arranged to the second coil at a predetermined interval, and the second coil is a second predetermined threshold value, respectively.

5. The winding structure according to claim 4, wherein a difference in height between a first coil of the first coil and a third coil of the third coil, which are sequentially arranged to the second coil at a predetermined interval, and the second coil is a third predetermined 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. The winding structure according to any one of claims 1 to 6, wherein an arrangement area of the first coil, the second coil, and the third coil is an isosceles trapezoid or an isosceles triangle.

8. A transformer, comprising:

the winding structure of any one of claims 1-7, being used as a high voltage winding of the transformer for outputting a first voltage;

a low voltage winding for outputting a second voltage;

an insulating object located between the high voltage winding and the low voltage winding for creating an insulation resistance.

9. The transformer of claim 8, wherein a distance between the high voltage winding and the low voltage winding is 9mm-15mm.

10. The transformer of claim 8, wherein a height ratio between the high voltage winding and the low voltage winding is 0.8-1.3.