JP2818090B2 - Electromagnetic inductor winding - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic inductor winding such as a transformer, and more particularly to an electromagnetic inductor winding comprising at least two windings concentrically arranged on an iron core.

[0002]

2. Description of the Related Art Generally, either a disk winding structure or a cylindrical winding structure is employed as a high-voltage side winding structure of a transformer, but it is necessary to increase the capacitance in the winding. A multi-cylindrical winding structure is considered advantageous in that it is possible. On the other hand, in the low-voltage-side winding structure, when the current is relatively large at a low voltage, a sheet winding in which a sheet-like conductor (thin conductor) is wound is used.

An example of a transformer winding employing a sheet winding for the low voltage side winding and a multiple cylindrical winding for the high voltage side winding will be described with reference to the drawings. The high-voltage side winding has a tap.

In FIG. 8A, reference numeral 1 denotes an iron core, and 2 denotes a low-voltage side winding, which is arranged concentrically with the iron core 1. Reference numeral 3 denotes a high-voltage side winding, which is arranged concentrically with respect to the iron core 1 outside the low-voltage side winding 2 and is composed of a plurality of cylindrical winding layers 4 to 8. Of the cylindrical winding layers 4 to 8, 4 to 7 are body coil layers, and 8 is a tap coil layer (8a, 8b, 8c).
Is a tap coil wire loop). The tap coil layer 8 is provided substantially at the center of the high-voltage side winding. Reference numerals 9 and 10 denote line terminals, and 11 to 15 denote tap terminals. FIG. 8B
Shows a connection diagram of the transformer windings shown in FIG. 8A, and shows tap terminals 12-13, 12-14, 11-14, and 11-.
It is configured such that the voltage can be variably adjusted by sequentially changing the connection between the terminal 15 and the tap terminal.

FIG. 9 shows a sectional view of a winding. The low-voltage side winding 2 uses a sheet conductor 16 and is wound around an outer periphery of a core tube 17 via an inter-turn insulator 18.
A lower end insulator 19 is attached to the lower end of the sheet conductor 16, and an upper end insulator 20 is attached to the upper end. FIG. 10 shows a developed perspective view of the low-voltage side winding 2. A high-voltage side winding 3 is wound around the outer periphery of the low-voltage side winding 2 via a duct spacer 21, and a flat rectangular insulated wire 22 is used as a conductor, and an insulating tube wound around the outer periphery of the duct spacer 21. 2
Each of the body coil layers 4 to 7 is provided on the
As shown in FIG. 2, the flat rectangular insulated wire 22 is spirally wound many times. An interlayer insulator 31 is provided between each coil layer.
Is wound. A lower end insulator 24 is attached to a lower end of the rectangular insulated wire 22, and an upper end insulator 25 is attached to the upper end.

[0006] The tap coil layer 8 also includes the body coil layers 4 to 7.
Using a rectangular insulated wire similar to that described above, the wire is wound in a spiral shape as shown in FIG. 11, but the tap terminal is pulled out during the winding. In addition, a tap break insulator 26 is inserted between the tap terminal 12 and the tap terminal 13 to secure a predetermined insulation distance.

The low-voltage side winding 2 and the high-voltage side winding 3 are received by the lower coil receiving insulator 27 and the lower coil receiving spacer 28, and the upper coil holding spacer 2
9 and the upper coil holding insulator 30 so as not to move in the axial direction. Upper coil holding insulator 30
Is composed of a plurality of insulating plates, and is assembled and adjusted using a plurality of insulating plates so that there is no gap between the core 1 and the low voltage side winding 2 and the high voltage side winding 3 so as to be sufficiently held down. You. In the radial direction, the core tube 1 of the low-voltage side winding 2 is provided.
A wedge 32 is inserted between the core 7 and the core 1 to fix the low-voltage side winding 2, the high-voltage side winding 3 and the core 1.

Next, the operation will be described. When a voltage is applied to the high-voltage side winding 3, a magnetic flux flows through the iron core 1 and a voltage is induced in the low-voltage side winding 2 by an electromagnetic induction action. In the high-voltage side winding 3, insulation between turns and between layers is ensured by an insulator wound around the outer periphery of the rectangular insulated wire 22 and an interlayer insulator 31 arranged between layers. In addition, with respect to the ground (insulation to the iron core 1), the lower end insulator 24 of the coil, the upper end insulator 25, the lower coil receiving spacer 2
8, insulation is ensured by the upper coil holding spacer 29, the lower coil receiving insulator 27, and the upper coil holding insulator 30.

On the other hand, the insulation between the sheet conductors 16 of the low-voltage side winding 2 is ensured by the inter-turn insulator 18, and the lower end insulator 19 and the upper end insulator 20 are isolated from the ground. Insulation is ensured by the lower coil receiving spacer 28, the upper coil pressing spacer 29, the lower coil receiving insulator 27, and the upper coil pressing insulator 30. Further, when a short circuit occurs on the low voltage side of the transformer, a large current flows through the high voltage side winding 3 and the low voltage side winding 2, and a large electromagnetic mechanical force is generated between both coils.

Further, with respect to the electromagnetic mechanical force in the radial direction, it is configured to withstand the electromagnetic mechanical force by the proof strength of the winding itself or a support from the outside of the iron core 1 or the high-voltage side winding 3. . For the electromagnetic electromagnetic force in the axial direction, the lower end insulator 19, the upper end insulator 20, the lower end insulator 24 of the coil,
Upper insulator 25 and lower coil receiving spacer 28, lower coil receiving insulator 27 and upper coil holding spacer 2
9. The upper coil holding insulator 30 acts as a support between the core 1 and prevents deformation in the axial direction of the coil.

Other reference documents relating to the present invention include "foil-wound transformer" disclosed in JP-A-63-25910 and "Foil-wrapped transformer" disclosed in JP-A-2-308510. Winding transformer ", JP-A-3-28910
No. 9 discloses a “foil-wound transformer”.

[0012]

Since the conventional transformer winding is constructed as described above, in the low-voltage side winding, the upper and lower coil end insulators are replaced each time the conductor is wound one turn. It is necessary to attach the upper and lower coil insulators at the start and completion of winding of each layer even on the high-voltage side winding, and these operations take a lot of time during winding work, There was a problem that work efficiency was poor. In addition, since dry transformers generally use materials having high heat resistance, the cost of these materials has been high. Further, in the case of the high voltage side winding having a high voltage, the insulation between the coil and the iron core has an insulation configuration having a creep path, and there is a problem that the dielectric strength is inferior to jump insulation.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. The present invention has been made to improve the work efficiency by shortening the work time during the winding work, and to insulate the upper end between the coil and the iron core. An object of the present invention is to obtain an inexpensive electromagnetic inductor winding that can improve the dielectric strength by adopting the jump insulation configuration.

[0014]

According to the present invention, there is provided an electromagnetic inductor winding comprising at least two or more windings concentrically arranged on an iron core, wherein a low-voltage side winding is arranged in an axial direction. The winding on the high voltage side is constituted by a multiple cylindrical winding having taps, and the winding layer including the tap coil is constituted by a plurality of insulated conductors. In parallel in the axial direction of the winding,
In addition, each of the insulated wire elements is connected in series in the same winding layer in an order different from the juxtaposition order.

[0015] Further, at least two concentrically arranged iron cores.
In the electromagnetic inductor winding composed of windings equal to or larger than the winding, the low voltage side winding is constituted by a winding made of a thin plate conductor constituting one turn in the axial direction and a plurality of turns in the radial direction, and the high voltage side winding is a tap. , And at least one of the low-voltage side winding and the high-voltage side winding has only the lower end insulator.

[0016]

The winding of the electromagnetic inductor according to the present invention is wound in such a manner that the number of turns corresponding to one tap is distributed in the coil axis direction and the unbalance is formed in the ampere turns in the winding axis direction even by the tap change of the high voltage side winding. There is no winding configuration. As a result, no axial external thrust due to the electromagnetic mechanical force is generated, the coil pressing on the upper end surface of the winding can be eliminated, and the insulation between the upper end portion of the coil and the ground becomes an insulation structure of only a jump, thereby improving the withstand voltage strength. . Further, in the dry type transformer, the material cost of the insulator can be reduced by eliminating the expensive coil holder.

Further, the electromagnetic inductor winding according to the present invention comprises:
Since there is no tap in the high-voltage winding, the ampere turns in the winding axis direction are always balanced, and no axial external thrust is generated by the electromagnetic mechanical force. Can be omitted, the withstand voltage strength is high, and the winding work efficiency can be improved. In the dry type transformer, the material cost of expensive insulators can be reduced.

[0018]

Embodiment 1 An embodiment of the present invention will be described below with reference to the drawings. FIG.
In 1 to 7, 16 to 19, 21 to 24, 27, 2
Reference numeral 8 denotes the same one as the conventional one shown in FIG. 9, and the description is omitted. Coil upper end portion of the insulator and the upper coil holding spacer, the upper coil presser insulator is omitted. In the figure, reference numeral 38 denotes a tap coil layer having a tap coil wire loop. FIG. 2 is an exploded perspective view of the low-voltage side winding 2, and 16 to 19 show the same ones as the conventional one shown in FIG. Insulation of the coil upper portion is omitted.

FIG. 3A shows the high-voltage side winding 3 shown in FIG.
3 is a simplified view of the connection state. In the figure, 38
a, 38b, 38c are tap wires for one tap,
These are spirally wound in the winding axis direction and are wound in parallel with each other. FIG. 3 (b) shows the connection diagram of FIG. 1 or FIG. 3 (a).

FIG. 4A shows a specific configuration of the tap coil layer 38 shown in FIG.
Reference numerals 8b and 38c denote wire loops for one tap, each of which is wound in a spiral shape in parallel with the winding axis direction. FIG. 4B shows a cross-sectional view of FIG.
Reference numeral 15 denotes a tap terminal, and reference numerals 42 to 45 denote tap lead wires, each of which is formed of an insulated wire.

FIG. 5 shows an example of an electromagnetic inductor winding in which both the low-voltage side winding 2 and the high-voltage side winding 3 are formed of thin plate conductors. In the figure, reference numerals 1, 2, 16 to 19, 21, 27, 28 denote the same components as those shown in FIG. 1, and a description thereof will be omitted. 33 is a sheet conductor constituting the high-voltage side winding 3;
Reference numeral 34 denotes an insulating cylinder provided for insulation between the high-voltage side winding 3 and the low-voltage side winding 2, and 35 denotes an inter-turn insulator for insulating between the sheet conductors 33. Conductor 3
3 is wider. Reference numeral 36 denotes a lower end insulator provided at the lower end of the sheet conductor 33, which supports the sheet conductor 33 and secures an insulation distance from the iron core 1.

FIG. 6 shows an example of a coil in which the low-voltage side winding 2 is formed of a sheet conductor and the high-voltage side winding 3 is formed of a multiple cylindrical winding having no tap. The structure of the high-voltage side winding 3 is simpler than that having the tap shown in FIG.
The ampere turns in the axial direction are always balanced.

Next, the operation will be described. When winding the low-voltage side winding 2, the sheet conductor 16 and the inter-turn insulator 18 are wound on the core tube 17 mounted on the winding machine. The lower end insulator 19 is attached. At this time, since the upper end insulator unnecessary, it is not necessary attachment, the winding work becomes easy.
Sequentially wound the sheet conductor 16 and the turn-to-turn insulation 18, after attaching the duct spacers 21 on the outer circumferential Upon completion of the winding of the predetermined turn, the insulating sheet duct spacers 21
To form an insulating cylinder 23.

A rectangular insulated wire 22 is placed on the insulating tube 23.
Are wound spirally to form the high-voltage side winding 3. At this time, the lower end insulator 24 is attached to the end or the beginning of the winding of each layer. Since the upper end insulator of the coil is not attached, the time becomes a half required for attachment of the end insulator, also material can be half. An interlayer insulator 31 is wound between each coil layer to ensure insulation between the layers. The insulated wire element of the tap coil differs in the order of serial connection and the juxtaposition order of the wire element so that a large voltage is not applied to the boundary of the wire element group.

When a voltage is applied to the high voltage side winding 3, a magnetic flux flows through the iron core 1 by an electromagnetic induction action, and a voltage is induced in the low voltage side winding 2. At the lower ends of the high-voltage side winding 2 and the low-voltage side winding 3, insulation from the iron core 1 is secured by lower end insulators 24 and 19, a lower coil receiving spacer 28, and a lower coil receiving insulator 27. In the upper end of the high-voltage side winding 2 and the low-voltage side winding 3, the upper end insulator and the upper spacer, although the upper coil insulator is not, and an appropriate gap is ensured between the core 1, solid insulation Since there is no object, jump insulation is performed instead of creep insulation, which is a preferable form in terms of insulation strength. The low-voltage side winding 2 is fixed to the iron core 1 by a wedge 32 so as not to move in the axial and radial directions. The high-voltage side winding 3 is fixed to the duct spacer 21 so as not to move in the radial and axial directions. Fixed.

Next, a case where a short circuit occurs on the low voltage side of the transformer will be described. When a short circuit occurs on the low voltage side, a large current flows through the high voltage side winding 3 and the low voltage side winding 2, and a large electromagnetic mechanical force is generated in both coils. With respect to the electromagnetic mechanical force in the radial direction of the winding, it is configured to withstand the electromagnetic mechanical force by the proof strength of the winding itself or a support from the outside of the iron core 1 or the high-voltage side winding 3. Regarding the electromagnetic mechanical force in the coil axis direction, the tap coil structure does not cause imbalance in the axial ampere turn in any tap connection, so even if a large short-circuit current flows, the coil due to the short-circuit current There is no axial external thrust. Therefore, it does not require a coil upper insulator and the upper spacer, structure of the coil holding such upper coil insulator.

Next, a description will be given of an electromagnetic inductor winding in which both the high-voltage side winding 3 and the low-voltage side winding 2 as shown in FIG. This coil configuration is applied to a transformer winding having a relatively low voltage on both the high voltage side and the low voltage side and a large current. Also in this coil configuration, the low voltage side winding 2,
Since no upper end insulator of the high-voltage side winding 3 both coils installation time required for attachment of the end insulator becomes half, also, the material may be half. Since the tap coil of the high-voltage side winding 3 is also composed of the sheet conductor 33 composed of one turn in the axial direction, no imbalance of the ampere turns in the axial direction occurs even by tap switching, and a large short-circuit current is generated. Even if it flows, no external thrust is generated in the coil axis direction due to the short-circuit current. Thus, there is no need coil upper end insulator and the upper spacer, the structure of the coil holding such upper coil insulator.

Next, as shown in FIG. 6, the low-voltage side winding 2 is a sheet conductor, and the high-voltage side winding 3 is a multi-cylinder winding having no tap. The device winding will be described. The cross-sectional view of the coil of the electromagnetic inductor winding is the same as that shown in FIG. 1 except that the tap coil layer 38 is not provided. Also in this coil configuration,
Since neither the low-voltage side winding 2 nor the high-voltage side winding 3 has the coil upper end insulator attached thereto , the time required to attach the end insulator is halved, and the material is also halved. Since the high-voltage side winding 3 has no tap, the ampere turns in the axial direction are always balanced, and even if a large short-circuit current flows, no external thrust in the coil axial direction due to the short-circuit current is generated. Therefore, and coils upper end insulator, no upper coil holding spacer, requires construction of a coil retainer such upper coil retainer insulator.

[Embodiment 2] Next, another embodiment will be described with reference to FIG.
Description will be made based on (a). In the figure, 1 to 14 correspond to FIGS.
The same components as those shown in FIG. 4 are shown, and description thereof will be omitted. Reference numerals 8a to 8c denote tap coil wires, and 8d denotes a body coil.
The a to 8c and the body coil 8d are spirally wound in parallel in the axial direction as the tap coil layer 8. FIG.
FIG. 7B shows the connection diagram of FIG. The coil cross section in FIG. 7A is the same as FIG. 1 except that the tap coil layer 8 is wound on the outermost layer of the high-voltage side winding 3.

[0030] In the electric induction winding, the low-voltage side winding 2, since no mounting high-voltage side winding 3 both coil upper end insulator, time is half that required for attachment of the end insulator, also, Only half the material is needed. Each of the tap coil wires 8a to 8c is wound in parallel in the coil axis direction and has a tap coil structure in which no imbalance of the ampere turns in the axial direction occurs in any of the tap connections, so that a large short-circuit current flows. Also, no external thrust is generated in the coil axis direction due to the short-circuit current. Thus, there is no need coil upper end insulator and the upper spacer, the structure of the coil holding such upper coil insulator.

[0031]

As described above, according to the electromagnetic inductor winding of the present invention, in the electromagnetic inductor winding composed of at least two or more windings concentrically arranged on the iron core, the low-voltage side winding is One turn in the axial direction and a plurality of turns in the radial direction are formed by a winding made of a thin plate conductor, the high-voltage side winding is formed by a multiple cylindrical winding having a tap, and the winding layer including the tap coil is formed by a plurality of windings. Insulated conductors are wound in parallel and spirally in the axial direction of the winding, and each insulated wire element is connected in series in the same winding layer in an order different from the juxtaposition order. In the electromagnetic inductor winding composed of at least two or more windings concentrically arranged, the low-voltage side winding is constituted by a winding made of a thin plate conductor having one turn in the axial direction and a plurality of turns in the radial direction. , High voltage side winding is tap It is constituted by a winding having no winding, and the end insulator of at least one of the low voltage side winding and the high voltage side winding is made only the lower end insulator, so that the working time during the winding operation is reduced. In addition to improving work efficiency, the insulation at the upper end between the coil and the iron core has a jump insulation configuration to improve the dielectric strength, and
An inexpensive electromagnetic inductor winding can be obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a configuration (Example 1) of a transformer winding in an electromagnetic inductor winding according to the present invention.

FIG. 2 is a perspective view showing a low-voltage side winding on which a sheet conductor is wound.

FIGS. 3A and 3B are an explanatory diagram showing a connection state on a cross section of a winding and a connection diagram of FIG.

4A is a plan view showing a tap coil layer, and FIG. 4B is a cross-sectional view showing the tap coil layer.

FIG. 5 is a sectional view showing a configuration (Example 2) of a transformer winding in an electromagnetic inductor winding according to the present invention.

FIG. 6 is an explanatory diagram showing a connection state on a winding cross section.

FIGS. 7A and 7B are an explanatory diagram showing a connection state on a cross section of a winding and a connection diagram of FIG.

FIG. 8 is an explanatory diagram (a) showing a connection state on a cross section of a conventional transformer winding and a connection diagram (b) thereof.

FIG. 9 is a cross-sectional view showing a configuration of a transformer winding in a conventional electromagnetic inductor winding.

FIG. 10 is a perspective view showing a conventional low-voltage side winding in which a sheet conductor is wound.

FIG. 11 is a plan view showing one layer of a conventional body coil.

[Explanation of symbols]

1 core 2 low-voltage side winding 3 high-voltage side winding 4-7 body coil layer 8 tap coil layer 11 to 15 tap terminals 16 sheet conductor 18 turns between the insulator 19 lower end insulator 21 duct spacers 22 rectangular insulated wire 23 insulation tube 24 lower end insulator 27 lower coil insulator 28 lower coil supporting spacer 29 upper coil retainer spacer 30 upper coil holding insulator 31 interlayer insulator 33 sheet conductor 36 lower end insulator 38 tap coil layer

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H01F 27/32 H01F 5/06 H01F 27/28

Claims (2)

(57) [Claims] 1. An electromagnetic inductor winding comprising at least two or more windings concentrically arranged on an iron core, wherein the low-voltage side winding is made of a thin plate conductor having one turn in the axial direction and a plurality of turns in the radial direction. The high-voltage side winding is constituted by multiple cylindrical windings having taps, and the winding layer including the tap coil includes a plurality of insulated conductors arranged in parallel in the axial direction of the winding and in a spiral shape. An electromagnetic inductor winding, wherein the winding is formed, and each insulated wire element is connected in series in the same winding layer in an order different from the juxtaposition order. 2. An electromagnetic inductor winding comprising at least two or more windings concentrically arranged on an iron core, wherein the low-voltage side winding is a thin-plate conductor comprising one turn in the axial direction and a plurality of turns in the radial direction. The high-voltage side winding is configured by a winding having no tap, and the end insulator of at least one of the low-voltage side winding and the high-voltage side winding is only a lower-end insulator. An electromagnetic inductor winding characterized by: