JPH04318909A - Device for manufacturing winding of transformer - Google Patents

Abstract

PURPOSE:To control the winding outside diameter of the winding of a transformer by giving plastic deformation during winding of a material to a sheet- shaped conductive coil material, and forming a zigzag spring. CONSTITUTION:In the case that the deviation of winding diameter is given to the controller of a winding controller, this controller resets the tensile strength of tension devices 9, 10a, and 10b anew. At this time, defining that the diameter of the expansive/contractive axis of an uncoiler device 2 is D and that the thickness of a coil material 1 is t, the residual distortion epsilon by winding the coil material 1 into the expansive/contractive axis will be as formula shows. The maximum distortion epsilona by elastic deformation, defining that the vertical elastic modulus is E and that the yield point stress is deltaa, will be that epsilona=deltaa/E. Accordingly, if it is an Al material, in the case of 1mm in thickness, if the winding axis is less than 2400mm, it causes the elastic deformation by winding, and gets into a winding curl. In the case of unwinding the coil material 1, which has caused elastic deformation by winding, and winding it on the winding 5 again, a zigzag spring is made in the sheet material 1.

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, a transformer using sheet-shaped windings that is configured to be able to continuously control the winding outer diameter to a desired outer diameter has not yet been proposed or realized. Not yet. In this way, being able to continuously control the outer diameter of a winding with several thousand turns to a specified size over all turns also improves the inherent efficiency of the transformer.
There is a high possibility that it will be widely used due to labor saving.

[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] The diameter of the expansion/contraction shaft for holding the sheet-like coil material of the uncoiler device is made sufficiently smaller than the expansion/contraction shaft of the recoiler on the winding side, and a zigzag spring made of sheet-like coil material is constructed on the recoiler expansion/contraction shaft. By controlling the height of the zigzag spring in proportion to the applied tensile force, it is possible to keep the outer diameter of the sheet winding within specified tolerances.

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 its winding profile is constantly measured by a winding profile 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 to the winding control device one by one by the winding outer diameter 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, new tensile forces T1', T2', T3' are specified based on that value, and the uncoiler device 2,
The new torque command value for each brake device 4a and 4b is T.
B1', TB2', 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 diameter of the expansion/contraction shaft of the uncoiler device 2 that holds the sheet-like conductive coil material 1 is D, and the plate thickness of the coil material is t, then the residual strain caused by winding the coil material around this expansion/contraction shaft is as follows. becomes. ε=(π(D+t)-D)/(πD) =t/D (1.1) Above (1.1)
), the diameter Da of the expansion/contraction shaft that does not cause plastic deformation when the coil material is wound around the expansion/contraction shaft of the uncoiler device is determined. The longitudinal elastic modulus is E, the stress at the descent point or 0.
If the 2% yield strength is δa and the maximum strain due to elastic deformation is εa, the following is obtained. εa = δa/E (1.2) Da
=t/(εa) =E・t/(δa)... (1.3)

FIG. 6 shows values for Al material, Cu material, and phosphor bronze material. Therefore, if the Al material is 1 mm thick and the winding axis is less than 2400 mm, plastic deformation will occur during winding, resulting in so-called winding curls.

As shown in FIG. 3, when the sheet material 1 which has undergone plastic deformation due to winding is unwound and re-wound around the winding wire 5, the sheet material 1 forms a zigzag spring as shown. A part of this zigzag spring is shown in Fig. 4. At point A, a force T sin θ acts to flatten the spring, but at or near point B, which is the apex of the spring, θ = 0, so T
sin θ=0. This shows that at point B, there is almost no force acting to flatten the spring. If the spring height is σ and σ0 is the free height, the relationship between σ and T is shown in Figure 5.
Shown below. The fact that when σ is small, T must be close to infinity is clear from the fact that lines using this type of sheet material require a leveling device for correction.

As a result, by applying plastic deformation to the sheet-like conductive coil material during material winding and forming a zigzag spring, the amount of deformation in the thickness direction in response to tensile force can be increased, and the tensile force can be controlled. Brake torque control of the uncoiler device can be configured using the deflection of the coil material in the thickness direction.

[0017]

[Effects of the Invention] As described above, the present invention creates a zigzag spring in the coil material by imparting a winding pattern to the coil material and winding the coil material around a shaft having a larger winding diameter. By obtaining a larger displacement in the thickness direction with respect to the tensile force applied in the winding direction than in the case of sheet material alone, it is possible to control the winding outer diameter of the transformer winding, and also to It is possible to provide a transformer winding manufacturing apparatus that has excellent effects such as improving the efficiency of the transformer through control and making the winding uniform by using automatic control through feedback.

[Brief explanation of drawings]

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

FIG. 2 is a diagram showing the control system.

FIG. 3 is a diagram showing a part of the mechanism.

FIG. 4 is a diagram for explaining the operation.

FIG. 5 is a diagram for explaining the operation.

FIG. 6 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 profile 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. The sheet-shaped conductive coil material and the sheet-shaped insulated coil material are overlapped and wound, and the expansion/contraction axis for winding them is made sufficiently thicker than the expansion/contraction axis of the uncoiler device that holds the sheet-shaped conductive coil material, and is placed on the expansion/contraction axis of the recoiler device. A recoiler device in which the sheet material forms a winding in the shape of a zigzag spring, a winding outer diameter measuring device for measuring the outer diameter of the winding, and a winding operation between the uncoiler device and the recoiler device. A tension device that measures the tensile force of the winding, a winding control device that is installed to control the winding outer diameter of the winding to a pre-input reference value, and an actual measurement value obtained from the winding outer diameter measuring device. The tensile force obtained from the tension device of the sheet-like conductive coil material is controlled to determine the error between the reference value and the pre-input reference value, and the tensile force is applied in the direction of tension of the zigzag spring made of the sheet-like conductive 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 vertical deflection and comparing it.