CN210272020U

CN210272020U - Transformer

Info

Publication number: CN210272020U
Application number: CN201921351968.3U
Authority: CN
Inventors: 杜学伟; 刘政; 芦军; 郝健
Original assignee: Sk Electric Tianjin Co ltd
Current assignee: Sk Electric Tianjin Co ltd
Priority date: 2019-08-20
Filing date: 2019-08-20
Publication date: 2020-04-07
Anticipated expiration: 2029-08-20

Abstract

The utility model provides a transformer, this transformer includes: a framework; a magnetic core connected to the skeleton; the transformer winding is sleeved outside the magnetic core and comprises a primary winding and a secondary winding, and a cable of the primary winding is twisted with a cable of the secondary winding. The cable of the primary winding and the cable of the secondary winding are twisted, so that the primary winding and the secondary winding are interwoven, the parasitic parameters of the transformer can be reduced, the power loss of the transformer is lower when the transformer works under the condition that the frequency is higher than a certain frequency, and the working efficiency is higher.

Description

Transformer

Technical Field

The utility model relates to a transformer technical field especially relates to a transformer.

Background

Transformers are a common type of electrical equipment and play an important role in the supply of electricity. The existing transformer generally adopts a cable layered winding manner to form a primary winding and a secondary winding of the transformer, that is, a cable is firstly wound by one or more layers outside a magnetic core to form the primary winding, and then the cable is wound by one or more layers outside the primary winding to form the secondary winding, because the primary winding and the secondary winding formed by the layered winding manner are parallel to each other, the parasitic parameters of the transformer are larger, and further the power loss of the transformer is larger when the transformer works under the condition of more than a certain frequency (for example, more than 1 megahertz), and the working efficiency is lower.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a transformer to the primary winding and the secondary winding that solve current transformer are parallel to each other, thereby lead to the parasitic parameter of transformer great, and then lead to the transformer power loss of during operation under the condition that is greater than certain frequency great, work efficiency is lower.

In order to solve the technical problem, the utility model discloses a realize like this:

an embodiment of the utility model provides a transformer, include:

a framework;

a magnetic core connected to the skeleton;

the transformer winding is sleeved outside the magnetic core and comprises a primary winding and a secondary winding, and a cable of the primary winding is twisted with a cable of the secondary winding.

Optionally, the primary winding includes a plurality of primary sub-windings, and a cable of each primary sub-winding is twisted with a cable of the secondary winding.

Optionally, the cable of the secondary winding has N twisted sections, each twisted section of the N twisted sections is twisted with the cable of at least one primary sub-winding, and N is a positive integer.

Optionally, the cables of at least part of the plurality of primary sub-windings are twisted.

Optionally, the secondary winding includes a plurality of secondary sub-windings, and a cable of each secondary sub-winding is twisted with a cable of the primary winding.

Optionally, the cable of the primary winding has M twisted sections, each twisted section of the M twisted sections is twisted with the cable of the at least one secondary sub-winding, and M is a positive integer.

Optionally, the cables of at least some of the plurality of secondary sub-windings are twisted.

Optionally, a plurality of first pins and a plurality of second pins are arranged on the framework;

the primary winding is electrically connected with at least part of the first pins, and the secondary winding is electrically connected with at least part of the second pins.

Optionally, the framework is provided with a plug hole;

the center post of the magnetic core is inserted into the plug hole, and the transformer winding is sleeved outside the center post and connected with the framework.

The embodiment of the utility model provides an in, because the cable of primary winding and secondary winding's cable transposition setting to make primary winding and secondary winding interweave each other together, can reduce the parasitic parameter of transformer like this, and then can make the transformer power loss when being greater than under the condition of certain frequency during operation lower, work efficiency is higher.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a front view of a transformer according to an embodiment of the present invention;

fig. 2 is a right side view of a transformer according to an embodiment of the present invention;

fig. 3 is a bottom view of a transformer according to an embodiment of the present invention;

fig. 4 is a schematic twisted view of a cable of a primary winding and a cable of a secondary winding of a transformer winding in a transformer according to an embodiment of the present invention;

fig. 5 is a front view of a bobbin and a transformer winding in a transformer according to an embodiment of the present invention;

fig. 6 is a right side view of a bobbin and a transformer winding in a transformer according to an embodiment of the present invention;

fig. 7 is a bottom view of a bobbin and a transformer winding in a transformer according to an embodiment of the present invention;

fig. 8 is a front view of a first sub-core of a magnetic core in a transformer according to an embodiment of the present invention;

fig. 9 is a bottom view of a first sub-core of a magnetic core in a transformer according to an embodiment of the present invention;

fig. 10 is a front view of a second sub-core of a magnetic core in a transformer according to an embodiment of the present invention;

fig. 11 is a top view of a second sub-core of a magnetic core in a transformer according to an embodiment of the present invention;

fig. 12 is a flowchart of a winding manufacturing method according to an embodiment of the present invention;

fig. 13 is a diagram illustrating an example of a method for manufacturing a winding according to an embodiment of the present invention;

fig. 14 is a second example of a winding manufacturing method according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1 to 3, an embodiment of the present invention provides a transformer, including:

a framework 1;

the magnetic core 2 is connected with the framework 1;

the transformer winding 3 is sleeved outside the magnetic core 2, the transformer winding 3 comprises a primary winding and a secondary winding, and a cable 31 of the primary winding is twisted with a cable of the secondary winding 32.

The bobbin 1 may be used to support or fix various components of the transformer. Specifically, the framework 1 may adopt a vertical mounting structure, a horizontal mounting structure, or other types of structures.

The magnetic core 2 described above can be used to form a closed magnetic circuit. Specifically, the core 2 may have a center pillar, for example, a zigzag core; the core 2 may not have a center pillar, and may be a square core, for example. The magnetic core 2 may be an integrated magnetic core; the magnetic core 2 may be a split type magnetic core.

The above connection can be understood as a detachable connection, such as a plug, a snap or a screw connection; the above-described connection may also be understood as a non-detachable connection, for example, welding.

The transformer winding 3 is sleeved outside the magnetic core 2, which can be understood as follows: the primary winding and the secondary winding are sleeved outside the magnetic core 2. The transformer winding 3 may be connected to the core 3, for example, the transformer winding 3 may be wound around the core 3; the transformer winding 3 may be connected to the bobbin 1, and for example, the transformer winding 3 may be wound around the bobbin 1.

The cable of the primary winding can be understood as a winding wire of the primary winding, i.e. a cable for winding the primary winding. The cable of the secondary winding may be understood as a winding wire of the secondary winding, i.e. a cable for winding the secondary winding.

The above-mentioned twisting arrangement may be understood as an interweaving arrangement or a helically wound arrangement. The twisted arrangement of the primary winding and the secondary winding may mean that the primary winding and the secondary winding are twisted together to form a twisted wire.

The embodiment of the utility model provides an in, because the cable of primary winding and secondary winding's cable transposition setting to make primary winding and secondary winding interweave each other together, make primary winding and secondary winding can couple better like this, thereby can reduce the parasitic parameter of transformer like stray capacitance, and then can make the power loss of transformer during operation under the condition that is greater than certain frequency lower, work efficiency is higher.

Optionally, the framework 1 is provided with a plug hole 13;

the center post of the magnetic core 2 is inserted into the plug hole 13, and the transformer winding 3 is sleeved outside the center post and connected with the framework 1.

The shape of the plugging hole 13 may be circular, rectangular, square or irregular. The shape of the insertion hole 13 can be adapted to the shape of the center leg of the core 2. The transformer winding 3 is sleeved outside the center pillar, and the transformer winding 3 may be directly wound on the center pillar, or the transformer winding 3 may be wound on the outer wall of the insertion hole 13 of the framework 1.

Because the framework is provided with the inserting hole, the middle column of the magnetic core is inserted into the inserting hole, and therefore the middle column of the magnetic core can be well protected.

Optionally, the magnetic core 2 includes a first sub-magnetic core 21 and a second sub-magnetic core 22, the first sub-magnetic core 21 is provided with a first inserting column 211, the second sub-magnetic core 22 is provided with a second inserting column 221, the first inserting column 211 is inserted into the first end of the inserting hole 13, the second inserting column 221 is inserted into the second end of the inserting hole 13, and the first inserting column 211 and the second inserting column 221 are abutted to form a middle column.

Because the magnetic core includes first sub-magnetic core and the sub-magnetic core of second, first spliced pole is inserted and is located the first end of spliced eye, and the second spliced pole is inserted and is located the second end of spliced eye to make the magnetic core can conveniently install and dismantle with the skeleton, and simple structure, manufacturing cost is lower.

Optionally, the primary winding includes a plurality of primary sub-windings, and the cable of each primary sub-winding is twisted with the cable 32 of the secondary winding.

In practical applications, the plurality of primary sub-windings may have at least two expressions:

the cables of all the primary sub-windings in the expression I and the plurality of primary sub-windings are not twisted with each other. For example, assume that the primary winding includes 3 primary sub-windings: A. b and C, the cables of all the primary sub-windings in the plurality of primary sub-windings are not twisted with each other: the cable A and the cable B are not twisted with each other, the cable A and the cable C are not twisted with each other, and the cable B and the cable C are not twisted with each other.

And a cable lay representing at least a portion of the plurality of primary sub-windings in a second, stranded arrangement. Specifically, the plurality of primary sub-windings of expression two may further include the following two cases:

cables of partial primary sub-windings in the primary sub-windings are twisted. For example, assume that the primary winding includes 3 primary sub-windings: A. b and C, the cable lay arrangement of the partial primary sub-winding of the plurality of primary sub-windings can be understood as follows: the cable A and the cable B are mutually twisted, the cable C and the cable A are not twisted, and the cable C and the cable B are not twisted; it can also be understood that: the cable A and the cable C are mutually twisted, the cable B and the cable A are not twisted, and the cable B and the cable C are not twisted; it can also be understood that: the cable B and the cable C are mutually twisted, the cable A and the cable B are not mutually twisted, and the cable A and the cable C are not mutually twisted.

Cables of all the primary sub-windings in the two or more primary sub-windings are twisted. For example, assume that the primary winding includes 3 primary sub-windings: A. b and C, the cable lay arrangement of all of the plurality of primary sub-windings can be understood as: the cable A, the cable B and the cable C are twisted with each other.

In the second expression, the cables of at least part of the primary sub-windings in the plurality of primary sub-windings are twisted, so that parasitic parameters of the transformer, such as parasitic inductance, can be further reduced, and further, the transformer can have lower power loss and higher working efficiency when operating at a frequency higher than a certain frequency.

In the embodiment of the utility model provides an in, each elementary subwinding among the above-mentioned a plurality of elementary subwinding can all be established ties, all parallelly connected or part is established ties and part is parallelly connected as required, does not do the restriction here. For example, when the primary winding includes 3 primary sub-windings A, B, C, A, B, C may be connected in series sequentially, A, B, C may be connected in parallel, or a and B may be connected in series and then connected in parallel with C.

It should be noted that the secondary winding may include only one secondary sub-winding, or may include a plurality of secondary sub-windings. When the secondary winding includes a plurality of secondary sub-windings, the twisted arrangement of the cable of each primary sub-winding and the cable of the secondary winding may be understood as follows: the cable of each primary sub-winding is twisted with the cable of a part of the secondary sub-winding, which can also be understood as follows: the cable of each primary sub-winding is twisted with the cable of each secondary sub-winding. In addition, when the secondary winding includes a plurality of secondary sub-windings, the plurality of secondary sub-windings may have at least the following expression: cables of all secondary sub-windings in the first and the plurality of secondary sub-windings are not twisted with each other; and cables of at least part of the secondary sub-windings in the plurality of secondary sub-windings are twisted. In addition, when the secondary winding includes a plurality of secondary sub-windings, each of the plurality of secondary sub-windings may be connected in series, in parallel, or in series and in parallel, as needed, and is not limited herein.

Because the cable of each primary sub-winding is twisted with the cable of the secondary winding, the primary winding and the secondary winding can be coupled better under the condition that the primary winding comprises a plurality of primary sub-windings, so that the parasitic parameters of the transformer can be further reduced, the power loss of the transformer during working under the condition of being greater than a certain frequency is further lower, and the working efficiency is higher.

Optionally, the cable 32 of the secondary winding has N twisted sections, each twisted section of the N twisted sections is twisted with the cable of the at least one primary sub-winding, and N is a positive integer.

Wherein, the twisted section may be a cable section for twisting; two adjacent twisted sections can be directly connected end to end or can be connected through an unstranded section. At least one of the above-mentioned elements may be one, or more than one. The cable length of each twisted section may be equal to or different from the cable length of the primary sub-winding twisted by the twisted section, and is not limited herein.

Because each twisted section in the N twisted sections of the secondary winding is twisted with the cable of at least one primary sub-winding, the parasitic parameters of the transformer can be further reduced, and the power loss of the transformer is lower and the working efficiency is higher when the transformer works under the condition of being higher than a certain frequency.

Optionally, the secondary winding includes a plurality of secondary sub-windings, and a cable of each secondary sub-winding is twisted with the cable 31 of the primary winding.

Wherein, the expressions of the plurality of secondary sub-windings can at least have the following two expressions:

the cables of all the secondary sub-windings in the expression I and the plurality of secondary sub-windings are not twisted with each other.

And a cable lay representing at least a portion of the secondary sub-windings of the second plurality of secondary sub-windings. In the second expression form, the cables of at least part of the secondary sub-windings in the plurality of secondary sub-windings are twisted, so that parasitic parameters of the transformer, such as parasitic inductance, can be further reduced, and further, the transformer can be enabled to have lower power loss and higher working efficiency when working under the condition of more than a certain frequency.

It should be noted that the primary winding may include only one primary sub-winding, or may include a plurality of primary sub-windings. When the primary winding includes a plurality of primary sub-windings, the cable of each secondary sub-winding is twisted with the cable of the primary winding, which can be understood as: the cable of each secondary sub-winding is twisted with the cable of a part of the primary sub-winding, which can also be understood as follows: the cable of each secondary sub-winding is twisted with the cable of each primary sub-winding. In addition, when the primary winding includes a plurality of primary sub-windings, the plurality of primary sub-windings may have at least the following expression: cables of all primary sub-windings in the first and the plurality of primary sub-windings are not twisted with each other; and cables of at least part of the primary sub-windings in the plurality of primary sub-windings are twisted.

Because the cable of each secondary sub-winding is twisted with the cable of the primary winding, the primary winding and the secondary winding can be coupled better under the condition that the secondary winding comprises a plurality of secondary sub-windings, so that the parasitic parameters of the transformer can be further reduced, the power loss of the transformer during working under the condition of being greater than a certain frequency is further lower, and the working efficiency is higher.

Optionally, the cable 31 of the primary winding has M twisted sections, each twisted section of the M twisted sections is twisted with the cable of the at least one secondary sub-winding, and M is a positive integer.

Wherein, the twisted section may be a cable section for twisting; two adjacent twisted sections can be directly connected end to end or can be connected through an unstranded section. At least one of the above-mentioned elements may be one, or more than one. The cable length of each twisted section may be equal to or different from the cable length of the secondary sub-winding twisted by the twisted section, and is not limited herein.

Because each twisted section in the M twisted sections of the primary winding is twisted with the cable of at least one secondary sub-winding, the parasitic parameters of the transformer can be further reduced, and the power loss of the transformer is lower and the working efficiency is higher when the transformer works under the condition of being higher than a certain frequency.

Optionally, the framework 1 is provided with a plurality of first pins 11 and a plurality of second pins 12;

the primary winding is electrically connected to at least part of the first pins 11 and the secondary winding is electrically connected to at least part of the second pins 12.

The pin may be a pin. The first pin 11 may be used to electrically connect to an end of a cable 31 of the primary winding, and the second pin 12 may be used to electrically connect to an end of a cable 32 of the secondary winding. The number of the first pins 11 and the number of the second pins 12 may be set as required.

The primary winding is electrically connected with at least part of the first pins 11, and each sub-winding of the primary winding is electrically connected with at least part of the first pins 11; the secondary winding is electrically connected to at least a portion of the second pins 12, and each sub-winding of the secondary winding is electrically connected to at least a portion of the second pins 12.

The plurality of first pins 11 and the plurality of second pins 12 may be disposed on the same side of the frame 1, or may be disposed on different sides of the frame 1; therefore, the embodiments of the present invention are not limited.

Because a plurality of first pins and a plurality of second pins are arranged, and the cables of the sub-windings are directly connected to the pins respectively, the serial connection or the parallel connection among the sub-windings can be realized more conveniently.

It should be noted that various optional embodiments described in the embodiments of the present invention may be implemented by combining with each other or by implementing them separately, and the embodiments of the present invention are not limited thereto.

An embodiment of the present invention further provides a winding manufacturing method for manufacturing a transformer winding in a transformer in the above-mentioned embodiment, including:

step 1201, twisting the first cable and the second cable to obtain a twisted wire;

and step 1202, winding the stranded wire to form a transformation winding comprising a primary winding and a secondary winding.

The first cable can be understood as a winding wire of the primary winding, that is, a cable for winding the primary winding; the second cable may be understood as a winding wire of the secondary winding, i.e. a cable for winding the secondary winding.

In particular, the first cable may comprise one or more first sub-cables, each of which may be adapted to form a primary sub-winding. When the first cable includes only one first sub-cable, the wound primary winding may include only one primary sub-winding; when the first cable includes a plurality of first sub-cables, the wound primary winding may include a plurality of primary sub-windings.

Likewise, the second cable may comprise one or more second sub-cables, each of which may be adapted to form a secondary sub-winding. When the second cable includes only one second sub-cable, the wound secondary winding may include only one secondary sub-winding; when the second cable includes a plurality of second sub-cables, the wound secondary winding may include a plurality of secondary sub-windings.

The embodiment of the utility model provides an in, owing to at first strand first cable and second cable, obtain the stranded wire, convolute the stranded wire again, form the vary voltage winding including primary and secondary, thereby make primary's cable and secondary's cable interweave each other together, like this, make primary and secondary can couple better, thereby can reduce the parasitic parameter of transformer like parasitic capacitance, and then can make the transformer the power loss of during operation under the condition that is greater than certain frequency lower, work efficiency is higher.

For ease of understanding, the following are exemplified herein:

supposing that a framework of the transformer is provided with a plug hole, a center post of the magnetic core is inserted in the plug hole, the framework of the transformer is provided with a plurality of first pins 1-9 and a plurality of second pins 10-18, and a transformation winding in the transformer comprises: the secondary winding composed of 4 secondary sub-windings with the same number of turns and the primary winding composed of 6 primary sub-windings with the same number of turns can be manufactured as follows:

firstly, 6 first sub-cables A, B, C, D, E, F with the same length and 4 second sub-cables G, H, L, M with the same length are prepared, and the length of a single second sub-cable is ensured to be 3 times that of a single first sub-cable;

then, as shown in fig. 13, twisting the first twisted section ab of the first sub-cable a, the first twisted section ef of the first sub-cable B, the first twisted section ij of the second sub-cable L, and the first twisted section mn of the second sub-cable M, twisting the first sub-cable C, the first sub-cable D, the second twisted section bc of the second sub-cable G, the second twisted section fg of the second sub-cable H, the second twisted section jk of the second sub-cable L, and the second twisted section no of the second sub-cable M, and twisting the third twisted sections cd, gh, kl, and op of the first sub-cable E, the first sub-cable F, and the second sub-cable G, respectively, to obtain twisted sections;

then, the twisted wire is wound on the outer wall of the plug hole of the transformer bobbin to form 6 primary sub-windings 11, 12, 21, 22, 31, 32 and 4 secondary sub-windings 41, 42, 43, 44 which are sleeved outside the magnetic core center post, as shown in fig. 14, both ends of the cable of the primary sub-winding 11 are respectively connected with the first pin 1 and the first pin 4, both ends of the cable of the primary sub-winding 12 are respectively connected with the first pin 2 and the first pin 5, both ends of the cable of the primary sub-winding 21 are respectively connected with the first pin 3 and the first pin 6, both ends of the cable of the primary sub-winding 22 are respectively connected with the first pin 4 and the pin 7, both ends of the cable of the primary sub-winding 31 are respectively connected with the first pin 5 and the first pin 8, both ends of the cable of the primary sub-winding 32 are respectively connected with the first pin 6 and the first pin 9, both ends of the cable of the secondary sub-winding 41 are respectively connected with the second pin 10 and the second pin 12, two ends of a cable of the secondary sub-winding 42 are respectively connected with the second pin 12 and the second pin 14, two ends of a cable of the secondary sub-winding 43 are respectively connected with the second pin 14 and the second pin 16, two ends of a cable of the secondary sub-winding 44 are respectively connected with the second pin 16 and the second pin 18, the first pins 1-3 are electrically connected, the first pins 4-6 are electrically connected, the first pins 7-9 are electrically connected, so that the parallel primary sub-windings 11, 12 and 21 are connected with the parallel primary sub-windings 22, 31 and 32 in series, and the 4 secondary sub-windings 41, 42, 43 and 44 are connected in series in sequence, thereby completing the manufacture of the primary winding and the secondary winding of the transformer winding.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A transformer, comprising:

a framework;

a magnetic core connected to the skeleton;

2. The transformer of claim 1, wherein the primary winding comprises a plurality of primary sub-windings, and wherein a cable of each primary sub-winding is twisted with a cable of the secondary winding.

3. The transformer of claim 2, wherein the cable of the secondary winding has N twisted sections, each twisted section of the N twisted sections being twisted with the cable of at least one primary sub-winding, and wherein N is a positive integer.

4. The transformer of claim 2, wherein the cables of at least some of the plurality of primary sub-windings are twisted.

5. The transformer of claim 1, wherein the secondary winding comprises a plurality of secondary sub-windings, and wherein a cable of each secondary sub-winding is twisted with a cable of the primary winding.

6. The transformer of claim 5, wherein the cable of the primary winding has M twisted sections, each of the M twisted sections is twisted with the cable of at least one secondary sub-winding, and M is a positive integer.

7. The transformer of claim 5, wherein the cables of at least some of the plurality of secondary sub-windings are twisted.

8. The transformer according to any one of claims 1 to 7, wherein a plurality of first pins and a plurality of second pins are provided on the bobbin;

9. The transformer of claim 1, wherein the bobbin is provided with a plug hole;