WO2022061620A1

WO2022061620A1 - Auto-transformer, method for designing auto-transformer and storage medium

Info

Publication number: WO2022061620A1
Application number: PCT/CN2020/117233
Authority: WO
Inventors: Juan YAN; Xian Wei WU; Jing Xie; Can Wen ZHOU; Teng Fei Zhang; Tuan Gang ZHANG; Qiao Sheng LI; Hao Zhang
Original assignee: Siemens Gas And Power Gmbh & Co. Kg; Siemens Energy Co., Ltd
Priority date: 2020-09-23
Filing date: 2020-09-23
Publication date: 2022-03-31
Also published as: CN116325037A

Abstract

An auto- transformer, a method for designing the auto- transformer and a storage medium. The auto-transformer includes: a housing (10) for defining an accommodating space; an iron core (20) installed in the accommodating space which was defined by the housing (10); a set of windings (30) sheathed on the iron core (20); a first tap (1) extracted from a first position of the set of the windings (30); a second tap (2) extracted from a second position of the set of the windings (30); a third tap (3) extracted from a third position between the first position and the second position of the set of the windings (30); and at least one fourth tap (4) extracted from a fourth position, which is different from the third position, and between the first position and the second position of the set of the windings (30). Multiple sets of input/output voltage combinations are realized by adding the taps in the auto-connected windings, thereby it is avoided that the independent winding and iron core are additionally added, a material cost is reduced, and a size of the transformer is reduced.

Description

Auto-transformer, method for designing auto-transformer and storage medium

Technical Field

The disclosure relates to the field of transformers, and in particular to an auto-transformer, a method for designing the auto-transformer and a storage medium.

Background

Usually, an auto-transformer has a set of input/output connected by auto-coupling.

Fig. 1A shows a circuit schematic diagram of a winding connection mode in an existing auto-transformer. As shown in Fig. 1A, two windings W1 and W2 are sheathed on an iron core, a tap 1 is extracted from a first end of the winding W1, a tap 2 is extracted from a second end of the winding W2, and a tap 3 is extracted from a connection point of a second end of the winding W1 and a first end of the winding W2, it may be realized by this set of the windings that an input/output voltage combination is U12/U32.

In special applications, multiple sets of input/output voltage combinations are required to be realized, it is required to add additional independent winding in the auto-transformer to realize the required voltage combinations.

Fig. 1B shows a circuit schematic diagram of a winding connection mode when multiple sets of input/output voltage combinations are required to be realized in the existing technology. As shown in Fig. 1B, besides the same windings as in Fig. 1A, another winding W3' with taps 4 and 5 which is sheathed on another iron core is still required. Combinations of these windings may realize the multiple sets of the input/output voltage combinations U12/U32 and U12/U45.

In the related technology, it is required that the independent winding and iron core are additionally added when the multiple sets of the input/output voltage combinations of the auto-transformer are realized, thereby a volume of the transformer is increased, and a manufacturing cost is improved.

Summary

A main purpose of the disclosure is to provide an auto-transformer, a method for designing the auto-transformer and a storage medium, as to solve problems in the related technology that independent winding and iron core need to be additionally added when multiple sets of input/output voltage combinations of the auto-transformer are realized, thereby the volume of the transformer is increased, and the manufacturing cost is increased.

In order to achieve the above purpose, according to one aspect of the disclosure, it provides an auto-transformer including: a housing for defining an accommodating space; an iron core installed in the accommodating space defined by the housing; a set of windings sheathed on the iron core; a first tap extracted from a first position of the set of the windings; a second tap extracted from a second position of the set of the windings; a third tap extracted from a third position between the first position and the second position of the set of the windings; and at least one fourth tap extracted from a fourth position, different from the third position, between the first position and the second position of the set of the windings.

The multiple sets of the input/output voltage combinations are realized by adding the taps in the auto-connected windings, thereby it is avoided that the independent winding and iron core are additionally added, the material cost is reduced, and the size of the transformer is reduced.

According to another aspect of the disclosure, it provides a method for designing an auto-transformer including: providing an iron core; providing a set of windings; enabling the set of the windings to be sheathed on the iron core; extracting a first tap from a first position of the set of the windings; extracting a second tap from a second position of the set of the windings; extracting a third tap from a third position between the first position and the second position of the set of the windings; extracting at least one fourth tap from a fourth position, different from the third position, between the first position and the second position of the set of the windings; providing a housing, wherein the housing is used for defining an accommodating space; and enabling the iron core sheathed with the set of the windings to be installed in the accommodating space.

According to yet another aspect of the disclosure, it provides a storage medium on which a program is stored, when executed, program causes a processor to perform the above method for designing the auto-transformer.

Through the above mode, the auto-transformer has the better economy and the smaller size.

Brief Description of the Drawings

Drawings constituting of a part of the present application are used to provide further understanding of the disclosure, exemplary embodiments of the disclosure and descriptions thereof are used to explain the disclosure, and do not form improper limitation to the disclosure. In the drawings:

Fig. 1A shows a circuit schematic diagram of a winding connection mode in an existing auto-transformer;

Fig. 1B shows a circuit schematic diagram of a winding connection mode when multiple sets of input/output voltage combinations are realized in the existing technology;

Fig. 2 shows a local section view of an auto-transformer according to an embodiment of the disclosure;

Fig. 3 shows a circuit schematic diagram of a winding connection mode according to the embodiment of the disclosure; and

Fig. 4 shows a flow diagram of a method for designing the auto-transformer according to the embodiment of the disclosure.

Herein, the above drawings include the following reference signs:

1-5: Tap

200: Auto-transformer

10: Housing

20: Iron core

22: Main core column

24: Side column

30: Winding

W1: First winding

W2: Second winding

W3: Third winding

W3’: Another winding

S402: An iron core is provided

S404: A set of windings are provided

S406: The set of the windings are sheathed on the iron core

S408: A first tap is extracted from a first position of the set of the windings

S410: A second tap is extracted from a second position of the set of the windings

S412: A third tap is extracted from a third position between the first position and the second position of the set of the windings

S414: At least one fourth tap is extracted from a fourth position, different from the third position, between the first position and the second position of the set of the windings

S416: A housing is provided, wherein the housing is used for defining an accommodating space

S418: The iron core sheathed with the set of the windings is installed in the accommodating space

Detailed Description of the Embodiments

In order to make those skilled in the art to better understand solutions of the disclosure, the technical solutions in embodiments of the disclosure are described clearly and completely below in combination with drawings in the embodiments of the disclosure.

It is to be noted that terms "first" , "second" and the like in the description and claims of the disclosure and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or a precedence order. It should be understood that data used in this way may be interchanged in a suitable case, so that the embodiments of the disclosure described herein may be implemented in a sequence except those illustrated or described herein. In addition, terms "including" and "having" and any variations of them are intended to cover non-exclusive inclusions, for example, a process, a method, a system, a product or a device including a series of steps or modules or units is not necessarily limited to those steps or modules or units listed clearly, but may include those that are not clearly listed or other steps or modules or units inherent in these processes, methods, products or devices.

According to an embodiment of the disclosure, an auto-transformer is provided. Fig. 2 shows a local section view of the auto-transformer according to the embodiment of the disclosure. To facilitate understanding, the auto-transformer shown in Fig. 2 is a single-phase auto-transformer, but the disclosure is not limited to this, the auto-transformer may also be a three-phase auto-transformer.

As shown in Fig. 2, the auto-transformer 200 includes a housing 10, an iron core 20 and a winding 30.

The housing 10 defines an accommodating space, the accommodating space may be filled with insulation cooling medium such as mineral oil, as to insulate and cool a body of the auto-transformer. The iron core 20 is installed in the housing and forms magnetic path of the auto-transformer 200, it includes one cylindrical main core column 22 and two side columns 24 which are positioned at two sides of the main core column 22 along a length direction in an L-shape. The windings 30 are sheathed on the cylindrical main core column 22, and the windings are not sheathed on the side columns 24 at two sides of the main core column 22. The windings 30 include one or more windings, for example, three.

Fig. 3 shows a circuit schematic diagram of a winding connection mode according to the embodiment of the disclosure. A connection mode of the windings 30 in the auto-transformer 200 in Fig. 2 is described in detail below in combination with Fig. 3.

As shown in Fig. 3, the windings 30 include a first winding W1, a second winding W2 and a third winding W3, preferably, the first winding W1, the second winding W2 and the third winding W3 are different fixed windings, but the disclosure is not limited to this, the first winding W1, the second winding W2 and the third winding W3 may be the same or different windings based on needs.

In combination with the auto-transformer as shown in Fig. 2, the first winding W1, the second winding W2 and the third winding W3 may be successively sheathed on the main core column 22 from inside to outside, but the disclosure is not limited to this, the first winding W1, the second winding W2 and the third winding W3 may be sheathed on the cylindrical main core column 22 in other modes, and each winding has two ends.

As shown in Fig. 3, a first end of the first winding W1 forms a first connection point, and a first tap 1 is extracted from the first connection point.

A second end of the third winding W3 forms a second connection point, and a second tap 2 is extracted from the second connection point.

A second end of the first winding W1 is connected with a first end of the second winding W2, as to form a third connection point, and a third tap 3 is extracted from the third connection point.

A second end of the second winding W2 is connected with a first end of the third winding W3, as to form a fourth connection point, and a fourth tap 4 is extracted from the fourth connection point.

Through the windings with the above connection mode, input/output voltage combinations, such as U12/U32 and U12/U42, may be realized, U12 here represents a voltage input from the first tap 1 and the second tap 2, U32 represents a voltage output from the third tap 3 and the second tap 2, and U42 represents a voltage output from the fourth tap 4 and the second tap 2.

To facilitate understanding, the above only describes that two sets of the input/output voltage combinations are realized by adding one new tap to the windings of the auto-transformer, but the disclosure is not limited to this, the more input/output voltage combinations may be realized by adding the more new taps to the windings of the auto-transformer based on needs.

Compared with the related technology that multiple sets of the input/output voltage combinations are realized by adding the additional independent winding and iron core, in the disclosure, the multiple sets of the input/output voltage combinations may be realized by adding the new tap in the auto-connected windings, thereby the material cost is reduced, and the size of the transformer is reduced.

According to an embodiment of the disclosure, a method for designing an auto-transformer is provided. Fig. 4 shows a flow diagram of the method for designing the auto-transformer according to the embodiment of the disclosure. The method for designing the auto-transformer according to the embodiment of the disclosure is described below in combination with Fig. 2 to Fig. 4.

As shown in Fig. 4, the method for designing the auto-transformer according to the embodiment of the disclosure includes:

S402: an iron core is provided.

The iron core here may be the iron core 20 as shown in Fig. 2, but the disclosure is not limited to this, the iron core may be iron cores in other forms.

S404: a set of windings are provided.

The set of the windings may include one or more windings, for example, three, but the disclosure is not limited to this, the number of the windings may be more or less.

S406: the set of the windings are sheathed on the iron core.

For example, as shown in Fig. 3, the set of the windings may include a first winding W1, a second winding W2 and a third winding W3, preferably, the first winding W1, the second winding W2 and the third winding W3 are different fixed windings, but the disclosure is not limited to this, the first winding W1, the second winding W2 and the third winding W3 may be the same or different windings based on needs.

S408: a first tap is extracted from a first position of the set of the windings.

As shown in Fig. 3, the first position may be a first end of the first winding W1.

S410: a second tap is extracted from a second position of the set of the windings.

As shown in Fig. 3, the second position may be a second end of the third winding W3.

S412: a third tap is extracted from a third position between the first position and the second position of the set of the windings.

As shown in Fig. 3, a second end of the first winding W1 and a first end of the second winding W2 are connected to form the third position.

S414: at least one fourth tap is extracted from a fourth position, different from the third position, between the first position and the second position of the set of the windings.

As shown in Fig. 3, a second end of the second winding W2 and a first end of the third winding W3 are connected to form the fourth position.

S416: a housing is provided, wherein the housing is used for defining an accommodating space.

The accommodating space of the housing may be filled with an insulation cooling medium such as mineral oil, as to insulate and cool a body of the auto-transformer.

S418: the iron core sheathed with the set of the windings is installed in the accommodating space of the housing.

The steps of designing the auto-transformer are described above in a certain sequence, but the steps of the method for designing the auto-transformer according to the embodiment of the disclosure are not limited to the above sequence, for example, Steps S404 and S408-S414 may be performed before Step S402, and Step S416 may also be performed before Step S402.

Through the auto-transformer designed by the above method, the material cost may be reduced, and the size of the transformer is reduced.

According to an embodiment of the disclosure, it provides a storage medium on which a program is stored, when executed, the program causes a processor to perform the method for designing the auto-transformer in the embodiment of the disclosure.

The above storage medium may include: various mediums that may store program codes, such as a U disk, a read-only memory, a random access memory, a mobile hard disk, a magnetic disk or an optical disk.

Apparently, the embodiments described above are only a part of the embodiments of the disclosure, rather than all of the embodiments. Based on the embodiments in the disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the scope of protection of the disclosure.

The above are only preferable embodiments of the disclosure, and are not intended to limit the disclosure, various modifications and changes may be made to the disclosure by those skilled in the art. Any modifications, equivalent replacements, improvements and the like made within spirit and principle of the disclosure should be included in the scope of protection of the disclosure.

Claims

An auto-transformer, comprising:

a housing for defining an accommodating space;

an iron core installed in the accommodating space defined by the housing;

a set of windings sheathed on the iron core;

a first tap extracted from a first position of the set of the windings;

a second tap extracted from a second position of the set of the windings;

a third tap extracted from a third position between the first position and the second position of the set of the windings; and

at least one fourth tap extracted from a fourth position, different from the third position, between the first position and the second position of the set of the windings.
The auto-transformer as claimed in claim 1, wherein the set of the windings comprise a first winding, a second winding and a third winding which are successively sheathed on the iron core, each of the first winding, the second winding and the third winding has two ends, the first position is a first end of the first winding, the second position is a second end of the third winding, a second end of the first winding and a first end of the second winding are connected to form the third position, and a second end of the second winding and a first end of the third winding are connected to form the fourth position.
A method for designing an auto-transformer, comprising:

providing an iron core;

providing a set of windings;

enabling the set of the windings to be sheathed on the iron core;

extracting a first tap from a first position of the set of the windings;

extracting a second tap from a second position of the set of the windings;

extracting a third tap from a third position between the first position and the second position of the set of the windings;

extracting at least one fourth tap from a fourth position, different from the third position, between the first position and the second position of the set of the windings;

providing a housing, wherein the housing is used for defining an accommodating space; and

enabling the iron core sheathed with the set of the windings to be installed in the accommodating space.
The method for designing the auto-transformer as claimed in claim 3, wherein the set of the windings comprise a first winding, a second winding and a third winding which are successively sheathed on the iron core, each of the first winding, the second winding and the third winding has two ends, the first position is a first end of the first winding, the second position is a second end of the third winding, a second end of the first winding and a first end of the second winding are connected to form the third position, and a second end of the second winding and a first end of the third winding are connected to form the fourth position.
A storage medium on which a program is stored, when executed, the program causes a processor to perform the method according to claim 3.