JPH04318908A - Device for manufacturing winding of transformer - Google Patents

Abstract

PURPOSE:To put the outside diameter of sheet winding within the designated tolerance by controlling the tensile strength in the direction of winding of a sheet material. CONSTITUTION:At start of winding, for a recoiler device 6, a certain revolution is designated by the controller of a winding controller, and as an object, by the quantity of feedback from tension devices 9, 10a, and 10b, the quantity of control to each brake device of uncoiler devices 2, 4a, and 4b is designated. As the winding progresses, the outside diameter dimension of winding 5 is fed back in detail to the winding controller by a winding outside diameter measuring instrument 7 and is compared with the designated outside diameter. In case that deviation occurs as a result, it is fed back as information to the controller of the winding controller, and new tensile strength is designated by the value, and a new torque value is given to each brake device of the uncoilers 2, 4a, and 4b so as to square it to the value.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention mainly relates to a manufacturing device for sheet windings for high voltage transformers, and in particular for transformer windings that can control the outer diameter of the sheet windings to a specified value. Regarding manufacturing equipment.

0002

2. Description of the Related Art Generally, the outer diameter of the winding of a transformer using a sheet winding largely depends on the variation in the thickness of the sheet material.

Conventionally, the outer diameter of the winding wire has been determined based on the value on the thicker side of the variation in the thickness of the sheet material, and the insufficient outer diameter has been compensated for by manually wrapping an extra layer of insulating sheet material.

0004

[Problems to be Solved by the Invention] However, no proposal or realization has yet been made for a transformer using sheet-shaped windings that is configured to be able to continuously control the winding outer diameter to a desired outer diameter. It has not been. In this way, the ability to continuously control the outer diameter of a winding with several thousand turns to a specified size over all turns improves the inherent efficiency of the transformer, and together with labor savings, it can be widely used. Highly sexual.

[0005] Originally, the main reason why a part of the winding of a transformer was changed from wire to sheet material was that the wire winding required relying on the craftsmanship of the winding workers. This is because even workers with low skill level can easily carry out the winding work.

[0006] One of the problems expected in the case of such a configuration is
There is an imbalance between the total tolerance and the allowable tolerance of the finished outer diameter due to variations in the thickness of the winding sheet material, which can reach several thousand turns. The tolerance of the thickness of the sheet material is about ±10% as the manufacturer's guaranteed value, but in reality it is within ±several percent at 3σ in most cases. The permissible tolerance of the outer diameter of the winding of a transformer is often specified at about +0%, -1 to 2% due to the performance of the high voltage equipment. Therefore, it is clear that the latter tolerance is overwhelmingly strict and causes various inconveniences in manufacturing the transformer winding.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a transformer that can reliably control the outer diameter of the winding one by one in real time without relying on human means to correct the unbalance of tolerances, thereby improving the efficiency of the transformer. The purpose of the present invention is to provide a winding manufacturing device for a container.

[0008]

[Means for Solving the Problems] A transformer winding manufacturing apparatus according to the present invention includes a sheet-like conductive coil material that is a conductive material, an uncoiler device that holds the sheet-like conductive coil material, and a sheet-like insulated coil that is an insulator. an uncoiler device that holds the sheet-shaped insulated coil material; a recoiler device that overlaps and winds the sheet-shaped conductive coil material and the sheet-shaped insulated coil material to form a winding wire; A winding outer diameter measurement device, a tension device that measures the tensile force during winding of the winding between the uncoiler device and the recoiler device, and a tension device that controls the winding outer diameter of the winding to a pre-input reference value. The error between the actual measurement value obtained from the winding control device and the winding outer diameter measuring device and the pre-input reference value is calculated for the sheet-shaped conductive coil material and the sheet-shaped insulated coil material. The control target is the tensile force obtained from the tension device, and the device controls the winding control device so that the measured value matches the reference value by converting the tensile force into a transverse strain amount and comparing the results.

[0009]

[Operation] When a tensile force is applied in the winding direction of the sheet material,
Due to the effect of this transverse strain in the tensile direction, the thickness of the sheet material can be reduced in proportion to the tensile force, and by controlling the tensile force, it is expected that the outer diameter of the sheet winding can be kept within the specified tolerance. .

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The hardware configuration of the mechanical part will be explained with reference to FIG. 1 is a sheet-like conductive coil material which is a conductive material, and this sheet-like conductive coil material 1 is passed through an uncoiler device 2.
The sheet-like conductive coil material 1 is uncoiled by the uncoiler device 2 and its tensile force is measured by the tension device 9. On the other hand, 3a and 3b are sheet-like insulated coil materials which are insulators, and uncoiler devices 4a and 4b hold these sheet-like conductive coil materials 3a and 3b. 3b is unraveled and the tension devices 10a, 10
The tensile force is measured by b. Thereafter, each sheet material passes through deflector rolls 11a and 11b and is wound onto a winding 5 held in a recoiler device 6, and the winding outline is constantly measured by a winding outline measuring device 7.

Next, the control configuration will be explained with reference to FIG. At the start of winding, the recoiler device 6 is designated with a constant rotation speed N by the controller of the winding control device, and the feedback amount T from the tension devices 9, 10a, 10b is set as the target.
1, T2, T3, the uncoiler devices 2, 4a,
Control amounts TB1, TB2, TB for each brake device of 4b
3 is specified.

As the winding progresses, the outer diameter D of the winding 5 is fed back one by one to the winding control device by the winding outer shape measuring device 7, and is compared with the specified outer diameter D0. As a result, if a deviation ΔD occurs, it is fed back as information to the controller of the winding control device, and new tensile forces T1', T2', T3' are specified based on that value,
Uncoiler devices 2, 4a, 4b to match that value.
The new torque command value for each brake device is TB1', T.
B2' and TB3' are provided.

Next, the operation of the above structure will be explained. As mentioned above, when the deviation ΔD of the winding outer diameter is given to the controller of the winding control device, the controller calculates the tensile forces T1, T2, T3 of the tension devices 9, 10a, 10b.
will have to be set up again. At this time, if the longitudinal strain due to this tensile force is ε, the lateral strain is εd, and Poisson's ratio is ν, the relationship is expressed by the following equation. εd = -ε・ν (1.1) Here, the longitudinal elastic modulus E and the stress at yield point are Or, if 0.2% yield strength σa and tensile stress at break are σb, the values are generally shown in FIG. Here, the equations of stress and strain within the elastic limit are shown below. ε=σ/E (1.2) Substituting equation (1.2) into equation (1.1) yields the following. εd = -σ・ν/E ... (1.3) (1.1
), FIG. 4 is obtained by substituting the above E, σ, and ν into the equation.

As a result, the amount of lateral strain εd due to the tensile force of the conductive material alone is slightly small compared to the material tolerance, but in the case of transformer windings, an insulating material such as polyethylene material is inserted between the conductive materials. Therefore, it is possible to configure brake torque control of the uncoiler device based on the amount of lateral strain, which comprehensively controls the tensile force sufficiently.

[0015]

[Effects of the Invention] As described above, the present invention applies a tensile force to the coil material in the winding direction, and depending on the amount of lateral strain caused by the tensile force,
It is possible to control the winding outer diameter of the transformer winding, and it has excellent effects such as improving the efficiency of the transformer by controlling it one by one, and making the winding uniform by using automatic control using feedback. It is possible to provide a transformer winding manufacturing apparatus that achieves the following.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a mechanical part of an example of a transformer winding manufacturing apparatus according to the present invention.

FIG. 2 is a diagram showing the control system.

FIG. 3 is a diagram for explaining the same.

FIG. 4 is a diagram for explaining the same.

[Explanation of symbols]

In the figure, 1, 3a, 3b are coil materials, 2, 4a, 4b are uncoiler devices, 5 is a winding wire, 6 is a recoiler device, 7 is a winding outer shape measuring device, 9, 10a, 10b are tension devices, 1
1a and 11b are deflector rolls.

Claims (1)

[Claims] Claim 1: A sheet-like conductive coil material that is a conductive material, an uncoiler device that holds the sheet-like conductive coil material, a sheet-like insulated coil material that is an insulator, an uncoiler device that holds the sheet-like insulated coil material, and these. A recoiler device that overlaps and winds a sheet-like conductive coil material and a sheet-like insulating coil material to form a winding wire, a winding outer diameter measuring device that measures the outer diameter of the winding wire, the uncoiler device, and the recoiler device. a tension device for measuring the tensile force during winding of the winding between the windings; a winding control device provided to control the winding outer diameter of the winding to a pre-input reference value; and the winding. The error between the actual measurement value obtained from the outer diameter measuring device and the pre-input reference value is controlled by the tensile force obtained from the tension device of the sheet-shaped conductive coil material and the sheet-shaped insulated coil material. A transformer winding manufacturing device comprising means for controlling a winding control device so that an actual measured value matches a reference value by converting it into a transverse strain amount and comparing the results.