CN211858354U - Wound form shell type transformer - Google Patents

Abstract

A wound shell type transformer comprises an A-phase coil, a B-phase coil, a C-phase coil and three groups of magnetic materials; the windows of the phase A coil and the phase B coil are both rectangular frames, the inner layer of each rectangular frame is formed by winding a low-voltage coil, and a high-voltage coil is wound outside the low-voltage coil; the structure and the size of the A-phase coil and the B-phase coil are the same; the rectangular frames of the phase A coil and the phase B coil are closed together to form a double-frame four-column structure; the low-voltage coil of the C-phase coil is wound outside the double-frame four-column structure formed by the rectangular frames of the A-phase coil and the B-phase coil, and the high-voltage coil of the C-phase coil is wound outside the low-voltage coil of the C-phase coil, so that the winding of the three-phase coil is completed, and the window of the three-phase coil is of a double-frame three-column structure; and the three groups of magnetic materials are respectively wound on three stand columns of the three-phase coil with the double-frame three-column structure to form a structure that the magnetic materials surround the high-voltage and low-voltage coils.

Description

Wound form shell type transformer

Technical Field

The utility model relates to a transformer technical field especially relates to a wound form shell type transformer.

Background

The transformer is a main power device applied to a power grid and a power system, the transformer is a device for changing alternating voltage by using the principle of electromagnetic induction, and mainly has the functions of realizing voltage transformation, current transformation, impedance transformation, isolation, voltage stabilization and the like, and the transformer mainly comprises an iron core (or a magnetic material) and a coil. Classified by core structure, they are mainly classified into laminated cores and wound cores.

The laminated core is generally of a planar arrangement type, and may be divided into a core type and a shell type. The core column section of the core type transformer is circular, the placing mode is vertical, the coil section is also circular, the high, medium and low voltage coils are sequentially and concentrically sleeved on the core column, the coils surround the core, and the coils are concentrically arranged. The shell type transformer iron core has a plurality of structures, coils are surrounded by the iron core, the section of an iron core column is rectangular, an iron core lamination is only one sheet wide, a plurality of iron core sheets are overlapped to form a certain thickness, the external connection shape of the section of the iron core column is rectangular, the iron core column is placed horizontally, side iron yokes are arranged on two sides of the iron core column, the iron cores surround the coils, and the coils are arranged in a staggered mode.

The laminated iron core has the main advantages of simple structure, convenience for standardization and universalization, namely, core type and shell type; however, the main disadvantage is that because the yoke and the core leg are assembled in butt joint (i.e. the core is formed by splicing), and because each core leg is composed of two separated parts, under high magnetic density, when magnetic flux passes through the separated parts, the magnetic field is not uniform, and noise vibration and other adverse effects are generated on the idle load performance. To alleviate this effect, the core leg cross-sectional area should be increased appropriately, but this will result in an increase in the amount of material used.

The wound iron core is wound along the optimal magnetic conduction direction of the oriented silicon steel sheet, the superior performance of the oriented silicon steel sheet is fully and fully exerted, the magnetic circuit distortion is small, and no seam and no air gap exist; each frame is a closed magnetic circuit conductor, and the orientation performance of the cold-rolled silicon steel sheet can be fully exerted, so that the no-load performance is obviously improved. Particularly, the especially-power component in the no-load current is obviously reduced, the power factor can be improved, and the power supply quality of a power grid is improved.

The wound core is divided into a planar wound core and a three-dimensional wound core. The main structure of the plane wound core is a triangular structure, so that the plane wound core has higher stability, the structure has the advantages of promoting high mechanical strength of the core, enhancing the short-circuit resistance of the transformer and effectively reducing no-load loss and current in the actual operation process. The three-dimensional wound core is formed by splicing three same single frames, each single frame is formed by sequentially and continuously winding a plurality of material belts, the spliced single frames are treated by curing and binding processes, the core is ensured to be a firm whole, the unique structure and the process of the three-dimensional wound core determine that the three-dimensional wound core has higher short-circuit resistance, the core has no sharp corner and no seam, the magnetic resistance is greatly reduced, the no-load current is reduced by 60-80% compared with the national standard, the power factor is improved, and the line loss of a power grid is reduced. The iron core is advantageous in energy saving performance. However, the requirement of the iron core winding process is high, the molds for winding the iron core first and winding the winding later are not easy to generalize, the mold filling and demolding processes are complex, the manufacturing difficulty of the transformer with the laminated iron core is high, the maintainability is weaker than that of the transformer with the laminated iron core, and the like.

In summary, to manufacture a novel transformer with energy saving, consumption reduction, material saving, low cost, environmental protection and low noise, the structure of the iron core is improved to form a breakthrough. The process of the wound core is similar to the core type structure of the laminated core, and the wound core is a coil wound core and can be called a wound core type transformer. And the utility model discloses a wound form shell type transformer is opposite with the structure of rolling up unshakable in one's determination (wound form heart type transformer), twines the winding earlier, and the back is around magnetic material, not only possesses all advantages of rolling up unshakable in one's determination, and is simple in manufacturing process, can utilize current technology, mould to realize automated production. The wound shell type transformer has more excellent structural advantages, more excellent energy-saving performance and more advantageous cost, and is the most ideal transformer at present.

Disclosure of Invention

An object of the utility model is to provide a wound form shell type transformer to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a wound shell type transformer comprises an A-phase coil, a B-phase coil, a C-phase coil and three groups of magnetic materials; the phase A coil, the phase B coil and the phase C coil are all composed of a high-voltage coil and a low-voltage coil; the windows of the phase A coil and the phase B coil are both rectangular frames, the inner layer of each rectangular frame is formed by winding a low-voltage coil, and a high-voltage coil is wound outside the low-voltage coil; the structure and the size of the A-phase coil and the B-phase coil are the same; the rectangular frames of the phase A coil and the phase B coil are closed together to form a double-frame four-column structure; the low-voltage coil of the C-phase coil is wound outside the double-frame four-column structure formed by the rectangular frames of the A-phase coil and the B-phase coil, and the high-voltage coil of the C-phase coil is wound outside the low-voltage coil of the C-phase coil, so that the winding of the three-phase coil is completed, and the window of the three-phase coil is of a double-frame three-column structure; and the three groups of magnetic materials are respectively wound on three stand columns of the three-phase coil with the double-frame three-column structure to form a structure that the magnetic materials surround the high-voltage and low-voltage coils.

Further, the window of the magnetic material is circular or elliptical; the magnetic material is formed by winding silicon steel strips or amorphous alloy strips with equal width.

Further, each corner of the three-phase coil of the double-frame three-column structure is a square corner or a transition round corner structure.

Further, an insulating layer is arranged between all the low-voltage coils and the high-voltage coils.

Furthermore, an insulating layer is arranged between the magnetic material and the high-voltage coil of the C-phase coil.

Furthermore, the high-voltage coil and the low-voltage coil are made of copper or aluminum.

Further, the magnetic material is made of one of curved silicon steel, a silicon steel strip or an amorphous alloy strip.

Compared with the prior art, the utility model has the advantages of it is following:

the three-phase high-low voltage coil is made into a double-frame three-column structure, and an iron core is wound on the three columns and is exchanged with the traditional transformer coil and the iron core, so that a small circle of magnetic field is formed; the magnetic conductivity of the structure is improved by 10-20 times, no gap exists, no-load current is reduced, eddy current loss is small, and iron loss is reduced by more than 70%; in addition, the structure can realize that the cost of the coil is close to that of the iron core, the overall cost is reduced to the maximum extent, the structure is simple, automatic production can be realized, and the cost is saved.

Drawings

Fig. 1 is a schematic diagram of a first structure of the wound shell type transformer of the present invention.

Fig. 2 is a schematic diagram of a second structure of the wound shell type transformer of the present invention.

Fig. 3 is a schematic diagram of the structure of the present invention in which the coil a and the coil B are closed together in fig. 2.

Fig. 4 is a schematic structural diagram of the three-phase coil in fig. 2 according to the present invention.

Fig. 5 is a schematic structural view of a winding method for a wound shell type transformer core according to the present invention.

In the figure: 11. a first high voltage coil; 12. a second high voltage coil; 13. a third high voltage coil; 21. a first low voltage coil; 22. a second low voltage coil; 23. a third low voltage coil; 3. A magnetic material; 4. A three-phase coil; 5. and a rotating device.

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 only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, in an embodiment of the present invention, a wound shell type transformer includes an a-phase coil, a B-phase coil, a C-phase coil, and three sets of magnetic materials 3; the A phase coil comprises a first high-voltage coil 11 and a first low-voltage coil 21; the B-phase coil comprises a second high-voltage coil 12 and a second low-voltage coil 22; the C-phase coil includes a third high voltage coil 13 and a third low voltage coil 23.

The first low-voltage coil 21 is wound into a rectangular frame; an insulating layer is bound outside the first low-voltage coil 21, and a first high-voltage coil 11 is wound outside the insulating layer; thus, the first low-voltage coil 21 and the first high-voltage coil 11 are wound to form an a-phase coil with a rectangular window, and the rectangular window of the a-phase coil comprises two upright posts and two transverse posts.

The second low-voltage coil 22 is also wound into a rectangular frame; an insulating layer is bound outside the second low-voltage coil 22, and a second high-voltage coil 12 is wound outside the insulating layer; thus, the second low-voltage coil 22 and the second high-voltage coil 12 are wound to form a B-phase coil with a rectangular window, and the rectangular window of the B-phase coil also comprises two upright posts and two transverse posts; the rectangular frames of the phase A coil and the phase B coil are the same in size.

Referring to fig. 3, the rectangular frames of the phase a coil and the phase B coil are closed together to form a double-frame four-column structure.

Referring to fig. 4, an insulating layer is wrapped outside a double-frame four-column structure formed by rectangular frames of the phase a coil and the phase B coil, a third low-voltage coil 23 is wound outside the insulating layer, an insulating layer is wrapped outside the third low-voltage coil 23, and a third high-voltage coil 13 is wound outside the insulating layer, so that winding of the phase C coil is completed; and finally, winding the three-phase coil 4, wherein the final structure of the three-phase coil 4 is a double-frame three-column structure.

Referring to fig. 1, three sets of magnetic materials 3 are respectively wound on three columns of a three-phase coil 4 with a double-frame three-column structure to form a structure in which the magnetic materials 3 surround the high-voltage and low-voltage coils; the window of the magnetic material 3 is circular or elliptical; the magnetic material 3 is formed by winding silicon steel strips or amorphous alloy strips with equal width.

Each corner of the three-phase coil 4 of the double-frame three-column structure is a square corner (refer to fig. 1) or a transition rounded corner structure (refer to fig. 2).

In the above-described apparatus of this embodiment, referring to fig. 5, the magnetic material 3 is assembled according to the following steps:

(1) a detachable winding mould 5 is arranged on an upright post of a three-phase coil 4 with a double-frame three-post structure;

(2) a stator of the winding mould 5 is fixed on an upright post of the three-phase coil 4 with the double-frame three-column structure, a rotor of the winding mould 5 drives the magnetic material 3 to rotate, and the magnetic material 3 is wound on the upright post of the three-phase coil 4 with the double-frame three-column structure;

(3) the magnetic material 3 is wound on the upright post of the three-phase coil 4 with a double-frame three-column structure into a circle or an ellipse;

(4) after the magnetic material 3 is wound, the winding mould 5 is disassembled, so that the manufacture of the three-phase energy-saving transformer is completed.

The high-voltage coil and the low-voltage coil are made of copper or aluminum.

The magnetic material 3 is made of one of curved silicon steel, a silicon steel strip or an amorphous alloy strip.

Insulating paint or other insulating materials are coated between each layer of the magnetic materials 3.

Further, the utility model discloses a manufacturing method of wound form shell type transformer, including the following step:

(1) winding a low-voltage coil of the phase A coil into a rectangular frame; winding a high-voltage coil outside the rectangular frame to complete the winding of the rectangular frame structure of the A-phase coil;

(2) winding the low-voltage coil of the phase B coil into a rectangular frame which is the same as the low-voltage coil of the phase A coil in the step (1); then, winding the high-voltage coil of the phase B coil outside the rectangular frame to complete the rectangular frame structure winding of the phase A coil; the sizes of the rectangular frames of the phase A coil and the phase B coil are the same;

(3) the rectangular frames of the phase A coil and the phase B coil in the steps (1) and (2) are gathered together to form a double-frame four-column structure;

(4) winding a low-voltage coil of the C-phase coil outside a double-frame four-column structure consisting of rectangular frames of the A-phase coil and the B-phase coil, and winding a high-voltage coil of the C-phase coil outside the low-voltage coil of the C-phase coil to finish the winding of the C-phase coil; finally, winding of the three-phase coil is achieved, and the final structure of the three-phase coil is a double-frame three-column structure;

(5) mounting a detachable winding mould on the upright post of the three-phase coil of the double-frame three-post structure in the step (4);

(6) the winding mould drives the magnetic material to rotate, and the magnetic material is wound on the stand column of the three-phase coil with the double-frame three-column structure;

(7) after the magnetic material is wound, the winding mould is disassembled, so that the manufacture of the three-phase energy-saving transformer is completed.

Furthermore, in the steps (1) - (4), insulating layers are arranged between all the high-voltage coils and all the low-voltage coils.

Further, the magnetic material in the step (6) is wound in a circular or elliptical shape on the columns of the three-phase coil of the double-frame three-column structure.

The utility model makes the three-phase high-low voltage coil into a double-frame three-column structure, and the iron core is wound on the three-column structure and exchanged with the traditional transformer coil and the iron core, so that the magnetic field moves a small circle; the magnetic conductivity of the structure is improved by 10-20 times, no gap exists, no-load current is reduced, eddy current loss is small, and iron loss is reduced by more than 70%; in addition, the structure can realize that the cost of the coil is similar to that of the iron core, the overall cost is reduced to the maximum extent, and the structure is simple.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (7)

1. A wound shell type transformer is characterized by comprising an A-phase coil, a B-phase coil, a C-phase coil and three groups of magnetic materials; the phase A coil, the phase B coil and the phase C coil are all composed of a high-voltage coil and a low-voltage coil; the windows of the phase A coil and the phase B coil are both rectangular frames, the inner layer of each rectangular frame is formed by winding a low-voltage coil, and a high-voltage coil is wound outside the low-voltage coil; the structure and the size of the A-phase coil and the B-phase coil are the same; the rectangular frames of the phase A coil and the phase B coil are closed together to form a double-frame four-column structure; the low-voltage coil of the C-phase coil is wound outside the double-frame four-column structure formed by the rectangular frames of the A-phase coil and the B-phase coil, and the high-voltage coil of the C-phase coil is wound outside the low-voltage coil of the C-phase coil, so that the winding of the three-phase coil is completed, and the window of the three-phase coil is of a double-frame three-column structure; and the three groups of magnetic materials are respectively wound on three stand columns of the three-phase coil with the double-frame three-column structure to form a structure that the magnetic materials surround the high-voltage and low-voltage coils.

2. A wound shell transformer according to claim 1, wherein the windows of magnetic material are circular or oval; the magnetic material is formed by winding silicon steel strips or amorphous alloy strips with equal width.

3. A wound shell transformer according to claim 1, wherein each corner of the three-phase coil of the double frame three-limb structure is a square corner or a transition rounded corner structure.

4. A wound shell transformer according to claim 1, wherein an insulating layer is provided between all of the low voltage and high voltage windings.

5. A wound shell transformer according to claim 1, wherein an insulating layer is provided between the magnetic material and the high voltage winding of the C-phase winding.

6. A wound shell transformer according to claim 1, wherein the high voltage winding and the low voltage winding are made of copper or aluminum.

7. The wound shell-type transformer of claim 1, wherein the magnetic material is one of curved silicon steel, silicon steel strips or amorphous alloy strips.

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