CN201556511U - Transformer coil - Google Patents

Abstract

The utility model discloses a transformer coil comprising a high voltage coil wound on the periphery of a low voltage coil, wherein the upper end of the low voltage coil is provided with a low voltage end loop (5); the upper end of the high voltage coil is provided with a high voltage end loop (3); the upper end surface of the high voltage end loop (3) is lower than that of the low voltage end loop (5); the upper end of the high voltage end loop (3) is also provided with a high voltage iron yoke loop (2); and the inner circumferential walls of the high voltage end loop (3) and the high voltage iron yoke loop (2) are respectively provided with an insulating paper board (4). The transformer coil leads the transformer to be relatively small in size and low in cost.

Description

transformer coil

technical field

The utility model relates to a transformer, in particular to a transformer coil.

Background technique

At present, most of the high and low voltage coils with a voltage level of 10KV are layered structures, that is, the high and low voltage coils are wound in one piece, and the high voltage coils are directly wound on the low voltage coils that have been wound, so that each group (that is, the phase separation) of coils is continuous. Winding into a whole, although it can reduce the difficulty of assembly, increase the mechanical strength of the coil, and reduce the manufacturing hours, but there are still the following shortcomings: due to the constraints of traditional thinking, the axial height of the general high and low voltage coils is the same That is, the upper end faces of the high-voltage end ring and the low-voltage end ring are flush, and at the same time, when limited by the creepage distance of the main insulation, it must be ensured that the distance between the high and low voltage main channels cannot be less than 6mm, which results in the diameter of the transformer coil Larger, resulting in large transformer size and high cost.

Utility model content

The technical problem to be solved by the utility model is to provide a transformer coil with small size and low cost.

The technical solution of the present invention is to provide a transformer coil with the following structure, including a high-voltage coil wound on the outer periphery of the low-voltage coil, the upper end of the low-voltage coil is provided with a low-voltage end coil, and the upper end of the high-voltage coil is provided with a high-voltage coil. End ring; the upper end face of the high-voltage end ring is lower than the upper end face of the low-pressure end ring, and the upper end of the high-voltage end ring is also provided with a high-voltage iron yoke ring, and the inner peripheral walls of the high-voltage end ring and the high-voltage iron yoke ring are provided with Insulated cardboard.

After adopting the above structure, compared with the prior art, the utility model has the following advantages: because the upper end surface of the high-voltage coil is lower than the upper end surface of the low-voltage coil, and because the insulating cardboard of the inner peripheral wall of the high-voltage end ring and the high-voltage iron yoke ring, Therefore, the straight-line distance of the original creepage path is converted into a curved distance, and the distance between the high and low voltage main channels is reduced to 3.5mm under the premise of ensuring the original creepage distance between the high and low voltage, so that the high and low voltage coils can be reduced. The distance between can make the size of the transformer smaller and the cost lower.

Description of drawings

The accompanying drawing is a schematic cross-sectional structure diagram of the transformer coil of the present invention.

As shown in the figure: 1. Spacer, 2. High-voltage iron yoke ring, 3. High-voltage end ring, 4. Insulating cardboard, 5. Low-voltage end ring.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described.

As shown in the figure, the transformer coil of the present invention includes a high-voltage coil wound on the outer periphery of the low-voltage coil, the upper end of the low-voltage coil is provided with a low-voltage end coil 5, and the upper end of the high-voltage coil is provided with a high-voltage end coil 3; The upper end face of the high-voltage end ring 3 is lower than the upper end face of the low-voltage end ring 5, that is, the end face of the high-voltage end ring 3 is lower than the end face of the low-voltage end ring 5 along the axial direction of the transformer coil. The upper end of the high-voltage end ring 3 is also provided with a high-voltage iron yoke ring 2 , and the inner peripheral walls of the high-voltage end ring 3 and the high-voltage iron yoke ring 2 are provided with insulating cardboard 4 . The same end of the low-voltage end ring 5 and the high-voltage iron yoke ring 2 is also provided with a spacer 1 . The sum of the heights of the high voltage end ring 3 and the high voltage iron yoke ring 2 is equal to the height of the insulating cardboard 4 .

The above is only a description of the preferred embodiments of the present utility model, but should not be construed as a limitation on the claims. The structure of the utility model can have other changes, not limited to the above-mentioned structure. In a word, all the various changes made within the protection scope of the independent claims of the utility model product are all within the protection scope of the utility model.

Claims (2)

1. a transformer coil comprises the high-tension coil that is wound on the low-voltage coil periphery, and the upper end of described low-voltage coil is provided with low-pressure end circle (5), and the upper end of described high-tension coil is provided with high-pressure side circle (3); It is characterized in that: the upper surface of described high-pressure side circle (3) is lower than the upper surface of low-pressure end circle (5), the upper end of described high-pressure side circle (3) also is provided with high pressure iron yoke circle (2), and the internal perisporium of described high-pressure side circle (3) and high pressure iron yoke circle (2) is provided with insulating board (4).

2. transformer coil according to claim 1 is characterized in that: the height sum of described high-pressure side circle (3) and high pressure iron yoke circle (2) equates with the height of insulating board (4).

Images