JP6886931B2 - Static guidance device - Google Patents

Description

The present invention relates to stationary induction devices such as transformers and reactors.

A coil for a transformer is composed of a coil, a low-voltage coil made of a sheet-shaped conductor and an insulator, and a high-voltage coil made of a round wire or a flat wire conductor and an insulator. The main production of a coil is winding work in which a conductor is wound in the direction of the coil axis and insulation processing work in which an insulating material is wound around a step between conductors. Further, since it is usually necessary to connect a tap wire for adjusting the voltage according to the number of turns to the high voltage coil, it is necessary to connect and pull out the tap wire in addition to the above work. Since the production of a high-voltage coil, which requires a large number of conductor windings and tap wire connection and extraction work, requires more man-hours than the production of a low-voltage coil, it is necessary to reduce the man-hours required for coil production. It is effective to reduce the man-hours required to manufacture the high-voltage coil. By reducing the man-hours required to manufacture high-voltage coils, the lead time for production can be shortened, leading to enhanced product competitiveness.

As an example of the structure of a coil having a tap wire, Patent Document 1 states that "a coil is formed by combining steps in which the number of windings per step is reduced so that the tap drawing portion always becomes the outer peripheral turn of the coil. In addition, the conductor can be pulled out continuously without interrupting the winding work by forming a turn that partially protrudes from the outer circumference of the coil at the number of times the tap is pulled out, making it easy to connect the tap terminal thereafter. (See "Means for Solving Problems").

Japanese Unexamined Patent Publication No. 2014-160786

The biggest bottleneck in the high-voltage coil manufacturing process is the tap wire connection and extraction work. For the connection and pull-out work of the tap wire, the winding work is interrupted when the winding work of the high-pressure coil is completed to the specified number of turns, and the conductor to be wound around the coil is folded back as a co-wire and pulled out, or the tap wire is pulled out. There is a method of preparing a conductor for use, winding the conductor around a coil winding conductor, folding it back, and pulling it out. In this case, since the winding work must be interrupted appropriately for the work of connecting and pulling out the tap wire, the work cannot be continuously performed until the winding work is completed for the entire number of windings, which deteriorates the man-hours. I'm inviting you.

According to the method described in Patent Document 1, the coil winding work can be continuously performed without interruption, but the winding habit is such that the conductor of the tap drawing portion protrudes in the radial direction during winding. In addition to attaching, it is necessary to adjust the height at which the conductor protrudes.

An object of the present invention is to provide a static induction device having a coil structure that can reduce the man-hours for connecting windings and tap wires and can be easily manufactured at low cost.

To give an example of the "stationary guidance device" of the present invention for solving the above-mentioned problems,
A stationary induction device having a coil around which a coil conductor is wound and an iron core into which the coil is inserted, and a tap wire is connected to the coil conductor. The coil has a rectangular cross-sectional shape and is the coil. includes the coil conductor tap lead portion of the coil conductor by arranging a spacer made of an insulator is protruded above thickness radially of the coil conductors between, the tap extraction unit, a rectangular corner portion The spacers are two square spacers arranged on both sides of the tap drawer portion, and the coil conductor of the tap drawer portion is wound around the square spacer, and the coil of the tap drawer portion is wound. The tap wire is connected to the conductor.

According to the present invention, the winding work can be continuously performed without interruption in the middle, and the tap wire connection, the drawing, and the insulation processing work thereof can be performed collectively, so that the work man-hours can be reduced. .. In addition, since the structure is inexpensive and easy to insert an insulating spacer, it is possible to realize a product with high product competitiveness without deteriorating the cost.

It is a figure which shows an example of the contents of the transformer which has a coil. It is a perspective view which shows the appearance of the coil before connecting a tap wire of Example 1. FIG. It is a perspective view which shows the appearance of the coil which connected the tap wire of Example 1. FIG. It is a front view which shows the structure of the tap pull-out part of the coil shown in FIG. 2B, and is the perspective view of a spacer. It is a perspective view which shows the connection of the tap drawing part of the coil shown in FIG. 2B, and the tap line. It is a perspective view which attached the insulating material in the connection of the tap drawing part and the tap wire of the coil shown in FIG. It is a front view which shows the structure of the tap pull-out part of the coil of Example 2, and is the perspective view of a spacer. It is a perspective view which shows the connection of the tap drawing part and the tap wire of the coil of Example 3. FIG. It is a front view which shows the structure of the tap pull-out part of the coil of Example 4, and is the perspective view of a spacer. It is a top view which shows the tap line drawing method by the conventional collinear line.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, in each figure for demonstrating the embodiment, the same constituent elements are given the same name and reference numeral as much as possible, and the repeated description thereof will be omitted.

Prior to explaining the embodiment of the present invention, an example of the transformer to which the present invention is applied will be described. FIG. 1 shows the contents of a three-phase tripod type oil-immersed transformer. As for the contents of the transformer, two rectangular ring-shaped inner cores 2a are arranged side by side, and an outer core 2b is arranged so as to surround the outside of the inner core 2a to form a transformer core. Then, coils 1 are provided on each of the three legs of the transformer core. In an oil-immersed transformer, the contents of the transformer are placed in a tank (not shown), and the tank is filled with insulating oil. The present invention can be applied not only to oil-immersed transformers but also to molded transformers, and further to all static induction devices including reactor devices.

FIG. 2A is a perspective view showing the appearance of the oil-filled transformer coil according to the first embodiment of the present invention before connecting the tap wire. Further, FIG. 2B is a perspective view showing the appearance of the oil-filled transformer coil to which the tap wire is connected. The coil 10 in this embodiment is composed of a winding frame 11, a low-voltage coil 12, and a high-voltage coil 13. The low-voltage coil 12 is configured by winding, for example, a sheet-shaped conductor around a winding frame 11 in the winding thickness direction. The high-voltage coil 13 is configured by winding a coil conductor 14 which is a flat wire conductor in a spiral shape in the axial direction and laminating a plurality of stages in the coil radial direction. For tap wire connection and pulling out, the conductor of the tap pulling out portion of the outermost layer of the high voltage coil is projected in the coil radial direction to connect the tap wire 15.

In this structure, as shown in FIG. 3A, two spacers 26 formed by stacking an insulating material under the conductor 14 of the tap drawer portion 25 are inserted side by side to form the conductor 14 of the tap drawer portion 25. Is floated from the conductor in the lower stage by the thickness of the conductor or more, and the conductor 14 is projected in the coil radial direction. By concentrating the tap wire connection positions on the corners of the coil, it is possible to prevent an increase in the vertical and horizontal dimensions of the coil due to the protrusion of the conductor for the spacer insertion. FIG. 3B is a perspective view of the spacer 26, which is made by laminating a plate-shaped insulating material 27 and attaching a kraft tape 28. The spacer 26 may be composed of one rectangular insulating material.

FIG. 4 is a perspective view showing the connection between the tap lead-out portion 25 of the coil and the tap wire 15, and by connecting the tap wire 15 to the upper portion of the conductor 14 projecting in the radial direction by inserting the spacer 26, the tap is tapped. You can pull out the line. Then, as shown in FIG. 5, the insulator 29 is inserted into the space formed between the two spacers 26, the insulator 29 is covered so as to cover the tap line from above the connection portion, and the insulator 29 is attached and fixed with tape. Insulation is applied by doing so. As the insulator 29, a U-shaped insulator may be used.

Conventionally, as shown in FIG. 9, the winding operation is interrupted when the conductor 41 is wound to a predetermined number of turns in the direction indicated by the arrow, and the wound conductor is pulled out as a tap wire 42 or a new tap is used. Prepare a wire, fold the wire back to the winding, connect it, and pull it out. After that, since it is necessary to ride on the tap wire drawn out and continue winding the conductor 41, it is necessary to interrupt the winding work in the middle, and the connection is brazed or welded until the heat drops. It is necessary to wait, and the work efficiency deteriorates accordingly.

According to this embodiment, it is possible to connect and pull out the tap wire to the conductor which has been wound up to the total number of turns with the tap drawing portion projected. And since it is not necessary to interrupt the winding work and the protruding height of the conductor is determined by the size of the spacer, it is possible to reduce the man-hours without the need for complicated adjustments for this structure. Become.

When the coil has a plurality of tap lead-out portions 25 and tap wires 15, as shown in FIG. 2B, the tap wires 15 are placed at different positions in the winding direction of the coil conductor in each tap lead-out portion 25. By shifting and connecting to the coil conductor 14, it is possible to prevent the tap wires 15 from overlapping.

With the winding structure of this embodiment, the winding work, the tap wire connection and the pull-out work can be continuously performed without interrupting the work. Since this winding structure can be made only by preparing an insulating spacer, it is an inexpensive and easy structure, and the product competitiveness can be enhanced by reducing the man-hours without increasing the cost of the product. This embodiment is applicable to all stationary induction devices including a coil having a tap wire.

FIG. 6 shows the structure of the tap extraction portion of the coil according to the second embodiment of the present invention. FIG. 6A is a front view showing the structure of the tap drawer portion, and FIG. 6B is a perspective view of the spacer.

In this embodiment, the shapes of the two spacers arranged on both sides of the tap drawer portion are the triangles shown in FIG. 6 (b). Then, as shown in FIG. 6A, the conductor 14 is wound along the slope of the triangle. By changing the shape of the spacer 26 from a quadrangle to a triangle, it is possible to suppress the protrusion of the conductor 14 to the outside. In the case of a quadrangular spacer, since the tap pull-out position is the corner of the coil, extra space is created at the corner of the spacer, but by using a triangular spacer, protrusion is suppressed and extra space is not created. be able to.

If there is a space between the conductors, it may be vulnerable to a short-circuit mechanical force in the radial direction, so it is best to fill the space of the tap drawer with insulation as much as possible without creating a space other than the necessary part. preferable.

According to this embodiment, in addition to the effect of the first embodiment, since the spacer of the tap drawing portion arranged at the corner portion of the coil is triangular, it is possible to suppress the protrusion of the conductor and prevent an extra space from being created. it can.

FIG. 7 is a perspective view showing the connection between the tap lead-out portion and the tap wire of the coil according to the third embodiment of the present invention.

In this embodiment, the tap wire 35 is bent in an L shape at the connection portion with the conductor 14. By bending the connecting portion of the tap wire 35 into an L shape, the contact area with the conductor 14 becomes large and the connecting surface can be made large. As a result, the risk of disconnection between the conductor 14 and the tap wire 35 can be reduced, and a more reliable coil structure can be obtained.

FIG. 8 shows the structure of the tap extraction portion of the coil according to the fourth embodiment of the present invention. FIG. 8A is a front view showing the structure of the tap drawer portion, and FIG. 8B is a perspective view of the spacer.

In this embodiment, the shape of the spacer arranged in the tap drawer portion is one spacer 36 having slopes on both sides and a central portion having a predetermined thickness, as shown in FIG. 8 (b). Then, as shown in FIG. 8A, the conductor 14 is wound along the slope of the spacer 36.

By using the shape of the spacer 36 as one spacer, it becomes easy to attach the spacer to the corner portion of the coil. Further, by providing slopes on both sides of the spacer 36, it is possible to suppress the protrusion of the conductor 14 to the outside. Further, since there is no space between the conductor of the tap drawer portion and the conductor of the lower stage, the strength against the short-circuit mechanical force in the radial direction can be increased.

1 Coil 2a Inner core 2b Outer core 10 Coil 11 Winding frame 12 Low pressure coil 13 High pressure coil 14 Coil conductor 15, 35 Tap wire 25 Tap drawer 26, 36 Spacer 27 Plate-shaped insulator 28 Craft tape 29 Insulation 41 Coil Conductor 42 Coil conductor Drawer tap wire

Claims (7)

A stationary induction device having a coil wound around a coil conductor and an iron core into which the coil is inserted, and a tap wire connected to the coil conductor.
The coil has a rectangular cross-sectional shape.
The coil is provided with a tap drawing portion in which the coil conductor is projected in the radial direction by a thickness equal to or larger than the thickness of the coil conductor by arranging a spacer made of an insulating material between the coil conductors.
The tap drawer portion is arranged at a rectangular corner portion, and the tap drawer portion is arranged at a rectangular corner portion.
The spacers are two quadrangular spacers arranged on both sides of the tap drawer portion.
The coil conductor of the tap drawing portion is wound around the quadrangular spacer, and the coil conductor is wound around the quadrangular spacer.
A stationary induction device in which the tap wire is connected to the coil conductor of the tap lead-out portion. In the stationary induction device according to claim 1,
A static induction device to which an insulator covering the coil conductor of the tap lead-out portion and the tap wire is attached. In the stationary induction device according to claim 1,
A static induction device in which an insulator is filled in the space between the coil conductor in the lower stage and the coil conductor in the tap drawer portion. A stationary induction device having a coil wound around a coil conductor and an iron core into which the coil is inserted, and a tap wire connected to the coil conductor.
The coil has a rectangular cross-sectional shape.
The coil is provided with a tap drawing portion in which the coil conductor is projected in the radial direction by a thickness equal to or larger than the thickness of the coil conductor by arranging a spacer made of an insulating material between the coil conductors.
The tap drawer portion is arranged at a rectangular corner portion, and the tap drawer portion is arranged at a rectangular corner portion.
The spacers are two triangular spacers arranged on both sides of the tap drawer portion.
Kai winding the coil conductor of the tap draw-out portion along the slopes of the spacer of the triangle,
A stationary induction device in which the tap wire is connected to the coil conductor of the tap lead-out portion.
Static guidance device. In the stationary induction device according to claim 1 or 4.
The tap wire is a stationary induction device in which a connecting portion with the coil conductor is bent in an L shape to increase the contact area with the coil conductor. In the stationary induction device according to claim 1 or 4.
It has a plurality of tap drawers and a plurality of tap lines, respectively.
A stationary induction device in which the tap wire is connected to the coil conductor at different positions in the winding direction of the coil conductor at each of the tap drawing portions. A stationary induction device having a coil in which a winding is wound around at least a first layer and a second layer, and an iron core into which the coil is inserted.
The first layer has a portion wound in the first number of turns and an adjacent portion wound in the second number of turns, which is the number of turns next to the first number of turns. An insulator is arranged between the winding of the adjacent portion and the winding of the second layer, and the insulator contacts at least two of the adjacent portions.
A stationary induction device characterized in that a tap lead wire is connected between the two windings of the adjacent portions.

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