JPH054435U - Oil-filled transformer winding - Google Patents

Abstract

(57) [Abstract] [Purpose] It is an object of the present invention to provide a winding structure in an oil-filled transformer that facilitates the inflow of cooling insulating oil into the winding located inside the core window. [Structure] A length L of a spacer 5 for forming an oil passage provided in the winding is shorter than a height H of the winding 6. [Effect] Since the insulating oil can flow into the oil gap of the winding in the iron core window through the gap formed at the upper and lower ends of the winding, the window height of the iron core 3 does not need to be larger than the required insulation dimension. You can get a realistic transformer.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a winding configuration of an oil-filled transformer having a cylindrical winding.

[0002]

[Prior Art]

 Fig. 4 is an overall view of an oil-filled transformer that uses conventional oil-filled transformer windings. The transformer causes losses in the iron core and windings during operation, which causes the temperature of the iron core and windings to change. To rise. Therefore, in the oil-filled transformer, as shown in FIG. 4, the insulating oil 2 is put in the transformer container 1 for the purpose of cooling and insulating the iron core 3 and the winding 4, and the transformer oil temperature rises above the specified temperature. It has a structure that does not.

FIG. 5 is a cross-sectional perspective view of a conventional oil-filled transformer winding and iron core assembly. Since the winding temperature rise of the transformer rises in proportion to the 1.6th power of the load current, the winding temperature rises. In order to keep the rise below the specified value, in an oil-filled transformer with a cylindrical winding structure, a spacer 5 is arranged between the iron core 3 and the winding 4 for the purpose of cooling the winding 4. The oil passage 6 is formed and the insulating oil 2 is passed therethrough to cool the winding 4 from the inside.

FIG. 6 is a winding cross-sectional view of a conventional oil-filled transformer winding, in which a spacer 5 provided in the winding 4 is appropriately inserted in a place where cooling of the winding 4 is required, It is arranged to form an oil passage.

In addition, the spacer 5 has the same length as the height dimension H of the winding 4 for the purpose of positioning during winding work and the like. Therefore, the oil 2 passing through the oil passage 6 enters the winding 4 from the lower end surface 2a and vertically escapes to the upper end surface 2b. FIG. 7 is a detailed view of the yoke insulation of the conventional oil-filled transformer winding. In the drawing, the yoke insulation 7 is attached with a vertical plate 7a for insulating and supporting the upper and lower ends of the winding in the window of the iron core 3, and an oil gap 7b for passing oil is provided.

[0006]

[Problems to be solved by the device]

 In the conventional oil-filled transformer winding, since the spacer 5 for forming the oil passage has the same length as the height H of the winding 4 as described above, the insulating oil 2 does not flow in the horizontal direction of the winding 4. When the iron core 3 and the winding wire 4 are combined because they cannot flow, the insulating oil cannot enter the portion of the winding wire 4 which is arranged in the window of the iron core 3. Therefore, since the insulating oil is passed through the window of the iron core, the yoke insulation 7 has a complicated structure. As a result, the height of the transformer core window has increased, which has been a factor in the increase in core size and weight.

The present invention has been made to solve the above problems, and is an oil-filled transformer winding having a winding structure that facilitates the inflow of insulating oil for cooling into the winding located inside the core window. Aim to get the line.

[0008]

[Means for Solving the Problems]

 The oil-filled transformer winding according to the present invention is an oil-filled transformer winding having a cylindrical winding structure having a spacer for forming a cooling oil passage in the winding, wherein the length of the spacer is the transformer winding. The width is smaller than the desired size than the width of the insulating paper constituting the.

[0009]

[Action]

 This facilitates the inflow of insulating oil into the winding.

[0010]

【Example】

 Example 1. FIG. 1 is a sectional perspective view showing an embodiment in which a cylindrical winding and an iron core according to the present invention are combined. Reference numeral 4 is a transformer winding, 4a is a low voltage winding, 4b is a high voltage winding, 5 is a spacer. Has a length L shorter than the height H of the winding 4. It is generally shorter than 5 mm. In the present embodiment, an example in which it is inserted between the low voltage winding 4a and the high voltage winding 4b is shown. 6 is an oil passage and 3 is an iron core. FIG. 2 is a cross-sectional view of the winding wire 4 shown in FIG. 1. Spacers 5 are arranged at equal intervals around the winding wire, and oil passages 6 are formed between the winding wires. ing. FIG. 3 shows a yoke insulation applied to one embodiment of the present invention.

[0011]

[Effect of the device]

 In this device, since the length of the spacer is shorter than the height of the winding, a gap is formed at the upper and lower ends of the winding, which facilitates the inflow of insulating oil for cooling the winding in the horizontal direction of the winding. Therefore, it is possible to obtain an economical transformer because the height of the iron core window does not need to be larger than the required insulation dimension.

[0012]

[Brief description of drawings]

FIG. 1 is a sectional perspective view of an oil-filled transformer winding and an iron core assembly showing an embodiment of the present invention.

2 is a cross-sectional view of the winding of FIG.

FIG. 3 is a detailed view of the yoke insulation 7 when the winding wire according to the present invention is applied.

FIG. 4 is an overall view of a conventional oil-filled transformer.

FIG. 5 is a sectional perspective view of a conventional oil-filled transformer winding and iron core assembly.

FIG. 6 is a winding cross-sectional view of a conventional oil-filled transformer winding.

FIG. 7 is a detailed view of a yoke insulation 7 of a conventional oil-filled transformer winding.

[Explanation of symbols]

 1 Transformer container 2 Insulating oil 3 Iron core 4 Winding 5 Spacer 6 Oil passage 7 Yoke insulation

Claims (1)

[Claims for utility model registration] 1. In an oil-filled transformer winding having a cylindrical winding structure having a spacer for forming an oil passage for cooling in the winding, the length of the spacer is transformer winding. An oil-filled transformer winding characterized in that the width of the insulating paper forming the wire is shorter than a desired dimension.