CN203377069U - Coil of rolled iron core transformer - Google Patents

Abstract

The utility model discloses a winding of a wound iron core transformer, which belongs to the field of electric equipment. The winding of the wound core transformer includes a low-voltage winding and a high-voltage winding wound on the coil frame of the same iron core column of the wound core; the low-voltage winding and the high-voltage winding are poured into an integral structure by epoxy resin; the An insulating liner is provided between the low voltage winding and the high voltage winding. The utility model not only strengthens the mechanical strength of the coil by providing an insulating liner between the windings, but also better ensures the electrical distance between the windings; by adopting the wound iron core, the loss of the iron core is small, and the no-load current of the transformer Small, which reduces the noise of the transformer and improves the operating efficiency of the transformer.

Description

Winding of a wound core transformer

technical field

The utility model relates to the field of electric equipment, in particular to a winding of a wound core transformer. the

Background technique

Transformers are commonly used power equipment in power systems. There are two main types of power transformers: oil-immersed power transformers and dry-type power transformers. Oil-immersed power transformers require insulating oil for insulation and heat dissipation, so maintenance and operation costs are high. Dry-type power transformers have obvious advantages in these aspects. ``

Dry-type wound core power transformers have integrated most of the advantages of existing transformer technologies and have become the main development direction of power transformers. The iron core of the power transformer mainly adopts two forms of laminated iron core and wound iron core. Among them, the laminated iron core has a large reluctance, which leads to large no-load current and high no-load loss, while the iron core with wound iron core has poor performance in these aspects. has obvious advantages.

In the actual production process of the windings of existing cast coiled iron core transformers, the iron core and wire package are generally produced separately, and then assembled, that is, the open coiled iron core is pre-processed, and the cast low-voltage and high-voltage coils are sequentially assembled. Load the coiled iron core from the opening, and then fold back the opening of the coiled iron core for butt joint, because the core has opening loss. the

In dry-type transformers, especially resin-insulated dry-type transformers, layered structures are generally adopted. When the number of layers is constant, if the number of turns of each layer increases, the interlayer voltage will increase, which will cause interlayer insulation and increase the width dimension of the winding. In order to improve this situation, the segmented layer winding is adopted, that is, the layer winding is changed into a structural form consisting of several layer windings connected in series. the

In the process of realizing the utility model, the inventor finds that there are at least the following problems in the prior art:

There is no separate insulation between the layered windings, but the epoxy resin fills the gaps between the layered windings to generate insulation directly during pouring. In this way, in production, it is difficult to control the insulation distance between the layered windings. At the same time, it is very easy to shift the layered windings during the pouring process, so that the distance between the layered windings is too close to cause eddy current loss and partial discharge. and turn-to-turn short circuits.

Contents of the invention

In order to solve the problems in the prior art, the embodiment of the utility model provides a winding of a wound core transformer. Described technical scheme is as follows:

The embodiment of the utility model provides a winding of a wound iron core transformer, the winding of the wound iron core transformer includes a low voltage winding and a high voltage winding wound on the coil frame of the same iron core column of the wound iron core;

The low-voltage winding and the high-voltage winding are cast into an integral structure by epoxy resin;

An insulating liner is provided between the low voltage winding and the high voltage winding.

Specifically, the high voltage winding is provided with a voltage regulating terminal, a high voltage outgoing line terminal and a high voltage outgoing line insulator which are sequentially connected. the

Specifically, the thickness of the insulating liner is the same as the thickness of each layer of coil in the winding. the

Specifically, the iron core is a planar rolled iron core formed by combining three independent single-frame rolled iron cores, the upper part of the rolled iron core is provided with an upper end clamp, and the lower part is provided with a lower end clamp;

The upper end clamp is provided with a hook, and the upper end clamp and the lower end clamp are fastened by a clamp connection rod.

Preferably, the high-voltage winding and the low-voltage winding on each iron core column are cured as one by pouring epoxy resin. the

Preferably, the high-voltage windings, low-voltage windings, and iron cores on the respective iron core columns are cured into one body through poured epoxy resin. the

The beneficial effect brought by the technical solution provided by the embodiment of the utility model is:

The mechanical strength of the coil can be strengthened by installing insulating gaskets between the windings, and the electrical distance between the windings can be better ensured; by using the wound iron core, the loss of the iron core is small, and the no-load current of the transformer is small, reducing the The noise of the transformer is reduced, and the operating efficiency of the transformer is improved.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention , for those skilled in the art, other drawings can also be obtained according to these drawings on the premise of not paying creative work. the

Fig. 1 is the structural representation of the winding of the wound core transformer that the utility model embodiment provides;

Fig. 2 is a view of A-A in Fig. 1 .

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model clearer, the implementation of the present utility model will be further described in detail below in conjunction with the accompanying drawings. the

The embodiment of the utility model provides a winding of a wound core transformer. Referring to FIG. 1 and FIG. 2 , the winding of the wound core transformer includes a winding 2 wound on an iron core 1 . the

Specifically, the iron core 1 is a planar wound core 10 formed by combining three independent single-frame wound cores, and a coil skeleton 11 is provided on the same core column of the planar wound core 10 . An upper clamp 12 is arranged on the upper part of the planar coiled iron core 10, a lower clamp 13 is arranged on the lower part, and a hook 14 is arranged on the upper clamp 13. The clamping piece 12 and the lower end clamping piece 13 are fastened through the clamping piece connecting pull rod 15 . the

Specifically, the winding 2 includes a low-voltage winding 21 and a high-voltage winding 22 wound on the bobbin 11, and the low-voltage winding 21 and the high-voltage winding 22 are formed as a whole by casting epoxy resin 3, wherein a low-voltage winding 21 and a high-voltage winding 22 are provided. An insulating liner 20 is provided. The high-voltage winding 22 is provided with a voltage-regulating terminal 221, a high-voltage outlet terminal 222 and a high-voltage outlet insulator 223 connected in sequence. The voltage-regulating terminal 221 is used to adjust the tap of the high-voltage coil, and the outlet of the low-voltage winding 21 is connected to the low-voltage outlet insulator 211. the

Preferably, the thickness of the insulating liner 20 is the same as the thickness of each coil layer of the winding 2 . In this way, the mechanical strength of the coil can be enhanced, and the problems caused by the displacement of the coil during production can be prevented, and at the same time, the electrical distance between the windings can be better ensured. the

Preferably, the high-voltage windings and low-voltage windings on each core column are cured as a whole by pouring epoxy resin, and the high-voltage windings, low-voltage windings, and iron cores on each iron core post can also be cured as a whole by pouring epoxy resin . the

More preferably, the iron core 1 is composed of three single-frame wound cores to form a three-dimensional triangular wound core 10. A change has been made, so a central airway is provided. The iron core 10 of this embodiment can also be composed of five single-frame wound cores to form a three-phase five-column planar wound core, and the iron core realizes the winding of a three-phase five-column wound core transformer. the

The beneficial effect brought by the technical solution provided by the embodiment of the utility model is:

The mechanical strength of the coil can be strengthened by installing insulating gaskets between the windings, and the electrical distance between the windings can be better ensured; by using the wound iron core, the loss of the iron core is small, and the no-load current of the transformer is small, reducing the Reduce the noise of the transformer and improve the operating efficiency of the transformer; because the high and low voltage windings are formed into an integral structure through resin casting, the short circuit impact resistance of the transformer is enhanced. Cost of production.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models. the

Claims (6)

1. A winding of a wound iron core transformer, the winding of the wound iron core transformer comprises a low voltage winding and a high voltage winding wound on the bobbin of the same iron core column of the wound iron core; it is characterized in that, The low-voltage winding and the high-voltage winding are cast into an integral structure by epoxy resin; An insulating liner is provided between the low voltage winding and the high voltage winding. 2 . The winding of a wound core transformer according to claim 1 , wherein the high voltage winding is provided with a voltage regulating terminal, a high voltage outlet terminal and a high voltage outlet insulator which are sequentially connected. 3. The winding of a wound core transformer according to claim 1, wherein the thickness of the insulating liner is the same as the thickness of each layer of the winding. 4. The winding of the wound core transformer according to claim 1, characterized in that, The iron core is a plane rolled iron core formed by combining three independent single-frame rolled iron cores, the upper part of the rolled iron core is provided with an upper end clamp, and the lower part is provided with a lower end clamp; The upper end clamp is provided with a hook, and the upper end clamp and the lower end clamp are fastened by a clamp connection rod. 5 . The winding of a wound core transformer according to claim 1 , wherein the high-voltage winding and the low-voltage winding on each of the iron core columns are cured as one by pouring epoxy resin. 6 . 6 . The winding of the wound core transformer according to claim 1 , wherein the high voltage winding, the low voltage winding and the iron core on each of the iron core columns are cured as one by pouring epoxy resin. 7 .

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