Double-U-shaped coil

A coil, U-shaped technology, applied in the direction of transformer/inductor coil/winding/connection, etc., can solve the problems of tight main insulation distance, reduce coil reactance height, and many coil turns, so as to increase main insulation distance and reduce The effect of high reactance and easy impedance adjustment

Active Publication Date: 2012-02-29
SHANDONG POWER EQUIP
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  • Abstract
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AI Technical Summary

Problems solved by technology

The multi-helical coil is axially wound around the cylinder, the number of coil turns is large, and the axial length is large, resulting in high reactance height and increased fuel tank height
Due to the limitation of the transportation height of the fuel tank, double-layer cylindrical coils are generally used now. The double-layer cylindrical type is to wind the wire along the inner layer first, then bend the wire, and then reversely wind along the outer layer after lifting the layer. The same coil is set in sections, which effectively reduces the reactance height of the coil and meets the requirements for the transportation height of the fuel tank. However, in order to meet the insulation requirements, the width of this coil needs to be set larger, resulting in a very tight main insulation distance, and higher cost

Method used

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Embodiment Construction

[0014] A double U-shaped coil, as shown in the figure, includes an upper coil 8 and a lower coil 10, the upper coil 8 is a U-shaped structure composed of an inner coil 5 and an outer coil 1, and the lower coil 10 is composed of an inner coil 12 The U-shaped structure formed with the outer layer coil 11, after the inner layer wires 5, 12 are wound, the upper layer is transposed, and the outer layer coils 1, 11 are continued to be wound, and the upper layer is provided with a wedge-shaped pad 9 at the upper layer transposition, There is a radial insulation mechanism between the inner coil and the outer coil. The radial insulation mechanism adopts a three-layer structure of stays 2, cardboard 4 and stays 3. The ends of the inner coil and the outer coil are provided with insulating ends. Circle 13. An axial insulation mechanism is provided between the upper coil 8 and the lower coil 10. The mechanism includes an insulating spacer 16, a paper ring 17 and an insulating spacer 18 arr...

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Abstract

The invention relates to a transformer coil, in particular to a double-U-shaped coil. The double-U-shaped coil comprises an upper part coil and a lower part coil, wherein an axial insulating mechanism is arranged between the two coils; both the upper part coil and the lower part coil have a U-shaped structure consisting of an inner layer coil and an outer layer coil; and the upper part coil and the lower part coil are connected with each other through an outer lead. In the double-U-shaped coil, the coils are arranged in a segmented mode, so the reactance height is effectively lowered, the main insulation distance is widened, flexible changes in a connecting mode and a winding mode can be realized, impedance can be adjusted conveniently, and the manufacturing cost is reduced.

Description

technical field [0001] The invention relates to a transformer coil, in particular to a double U-shaped coil. Background technique [0002] The low-voltage coils of large power transformers are generally multi-helical or double-layer cylindrical coils (single U-shaped). The multi-helical coil is axially wound around the cylinder, the number of coil turns is large, and the axial length is large, resulting in a high reactance height and an increased fuel tank height. Due to the limitation of the transportation height of the fuel tank, double-layer cylindrical coils are generally used now. The double-layer cylindrical type is to wind the wire along the inner layer first, then bend the wire, and then reversely wind along the outer layer after lifting the layer. The same coil is set in sections, which effectively reduces the reactance height of the coil and meets the requirements for the transportation height of the fuel tank. However, in order to meet the insulation requirements...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/28H01F27/32
Inventor 杨坤惠增明邵会朋
Owner SHANDONG POWER EQUIP
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