CN210722702U - Voltage regulating coil - Google Patents

Abstract

The utility model discloses a voltage regulating coil, which comprises a plurality of shunting sections, wherein each shunting section is of a double-cake coil structure, the end of one shunting section is connected with the start of the next shunting section, and each shunting section is wound with n turns; the coil comprises 8 tapped sections, and each tapped section is wound by 16 turns; a transposition connecting part is arranged on the tapping section of each double-cake type coil structure; gaskets are arranged on the tapping section of each double-pancake coil structure and between the tapping sections of the two double-pancake coil structures; the end of one tap section is connected with the start of the next tap section in a welding mode. The utility model discloses turn-to-turn voltage is less, and coil structural stability is good, and anti short circuit ability is strong.

Description

A voltage regulating coil

technical field

The utility model belongs to the technical field of transformer manufacturing, in particular to a voltage regulating coil.

Background technique

Transformer is a device that uses the principle of electromagnetic induction to convert one level of voltage and current into another level of voltage and current of the same frequency and transmits electrical energy. Transformer is an important equipment in power transmission and transformation equipment. The key position is to ensure the main equipment for social production of electricity. The structure and material of the transformer directly affect the quality and safety of the power supply. The coil of the transformer constitutes the circuit part of the device itself. It is directly connected to the external power grid and is the most important part of the transformer, so it is called the "heart" of the transformer; the coils inside the transformer include low-voltage coils, medium-voltage coils, and high-voltage coils. , The voltage regulating coil, according to the different capacity levels of the transformer product required, to wind the corresponding coil. The voltage regulating coils of ordinary transformer products are mostly cylindrical and pie-shaped, and the pie-shaped coils are tangled and continuous, while the 60-110kV grades use cylindrical, four-spiral and eight-spiral types; this type of coil has a stable structure. In addition, the inter-turn voltage is relatively high, so the wire insulation is mostly 1.35 ~ 1.95 turn insulation. Figure 1 is a schematic structural diagram of an existing eight-spiral voltage regulating coil, wherein the voltage difference between the first and eighth sections of the coil is 7 times the voltage of each tapped section; Figure 2 is an existing four-spiral voltage regulating coil. The schematic diagram of the structure is much better than that of the eight-helix, but the voltage difference between the first and fourth sections of the four-helix is 4 times the voltage of each tap, which is still relatively high.

SUMMARY OF THE INVENTION

In view of the above problems, the utility model makes up for the deficiencies of the prior art, and provides a double-cake type voltage regulating coil with a small inter-turn voltage; the voltage regulating coil of the utility model has a small inter-turn voltage and good coil structure stability. , strong short-circuit resistance.

To achieve the above purpose, the present invention adopts the following technical solutions.

The utility model relates to a voltage regulating coil, which is characterized in that the coil comprises a plurality of tap sections, each tap section has a double-cake coil structure, and the end of one tap section is connected to the beginning of the next tap section , each tap section is wound with n turns.

As a preferred solution of the present invention, the coil includes 8 tap sections, and each tap section is wound with 16 turns.

As another preferred solution of the present invention, a transposition connection is provided on the tap section of each double-cake coil structure.

As another preferred solution of the present invention, a gasket is provided on the tap section of each double-cake coil structure and between the tap sections of the two double-cake coil structures.

As another preferred solution of the present invention, the end of one tap section is connected to the start of the next tap section by welding.

As another preferred solution of the present invention, the voltage difference between every two tap sections is 720V.

Beneficial effects of the utility model.

The double-cake type voltage regulating coil with small inter-turn voltage provided by the utility model has the advantages of small inter-turn voltage, good coil structure stability and strong short-circuit resistance capability.

Description of drawings

In order to make the technical problems, technical solutions and beneficial effects solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

FIG. 1 is a schematic structural diagram of an existing eight-spiral voltage regulating coil.

FIG. 2 is a schematic structural diagram of a conventional four-spiral voltage regulating coil.

Figure 3 is a schematic structural diagram of the double-cake type voltage regulating coil of the present invention.

Marked in the figure: 1 is the tap section, 2 is the end, 3 is the start, 4 is the transposition connection, and 5 is the gasket.

Detailed ways

As shown in FIG. 3, a voltage regulating coil of the present invention is characterized in that: the coil includes a plurality of tap sections 1, each tap section 1 is a double-cake coil structure, and a complete tap section 1 is formed. The head 2 is connected to the head 3 of the next tap section 1, and each tap section 1 is wound with n turns.

Specifically, the number of turns n wound by each tap section 1 is determined according to the turn potential of the transformer.

As a preferred solution of the present invention, the coil includes 8 tap sections 1, and each tap section 1 is wound with 16 turns.

As another preferred solution of the present invention, a transposition connection 4 is provided on the tap section 1 of each double-cake coil structure.

As another preferred solution of the present invention, a gasket 5 is provided on the tap section 1 of each double-cake coil structure and between the two tap sections 1 of the double-cake coil structure.

As another preferred solution of the present invention, the end head 2 of one tap section 1 is connected to the start head 3 of the next tap section 1 by welding.

As another preferred solution of the present invention, the voltage difference between every two tap sections 1 is 720V.

The double-cake type voltage regulating coil with small inter-turn voltage provided by the utility model has the advantages of small inter-turn voltage, good coil structure stability and strong short-circuit resistance capability.

It can be understood that the above specific description about the present utility model is only used to illustrate the present utility model and is not limited to the technical solutions described in the embodiments of the present utility model. Modifications or equivalent replacements are made to the new model to achieve the same technical effect; as long as the needs of use are met, they are all within the protection scope of the present invention.

Claims (6)

1. A voltage regulating coil, characterized in that: the coil comprises a plurality of tap sections, each tap section is a double-cake coil structure, and the end of a tap section is connected with the beginning of the next tap section, Each tap section is wound with n turns. 2 . The voltage regulating coil according to claim 1 , wherein the coil comprises 8 tap sections, and each tap section is wound with 16 turns. 3 . 3 . The voltage regulating coil according to claim 1 , wherein the tap section of each double-cake coil structure is provided with a transposition connection. 4 . 4 . The voltage regulating coil according to claim 1 , wherein a gasket is provided on the tap section of each double-cake coil structure and between the tap sections of the two double-cake coil structures. 5 . . 5 . The voltage regulating coil according to claim 1 , wherein the end of one tap section is connected to the start of the next tap section by welding. 6 . 6 . The voltage regulating coil according to claim 1 , wherein the voltage difference between every two tap sections is 720V. 7 .

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