CN201112077Y - Transposed conductor for main transformer of locomotive - Google Patents

Abstract

The utility model relates to a locomotive main transformer is with transposition wire, specifically speaking are the winding wire that the high-power transmission electric locomotive main transformer of DJ4 used, belong to transformer technical field. The method is characterized in that two rows of the acetal enameled flat wires with mutually contacted wide surfaces are combined into the two rows of the enameled flat wires, the two rows of the enameled flat wires are transposed along the narrow surface in the same direction to form transposed enameled wire bundles, and a plurality of layers of insulating paper tapes are continuously and tightly wound outside the transposed enameled wire bundles. The utility model has simple, compact and reasonable structure; the space utilization rate of the winding can be improved, and the circulating current loss is reduced; a large amount of working hours are saved, and because the transposed conductor is formed by mechanically twisting and transposing, the time for winding the transformer coil can be greatly shortened; the coil wound by the transposed conductor has beautiful appearance and accurate coil size, thereby improving the quality of finished products and greatly reducing the eddy current loss.

Description

Transposed wire for locomotive main transformer

technical field

The utility model relates to a transposition wire for a main transformer of a locomotive, in particular to a winding wire used for a main transformer of a DJ4 high-power AC drive electric locomotive, and belongs to the technical field of transformers.

Background technique

In the prior art, multiple paper-wrapped flat wires need to be transposed when winding (stacked) coils, and transposition needs to occupy space, and there are many operators involved, the process is complicated, and the production time is long. The work efficiency is low, and the coils wound with multiple paper-wrapped flat wires have circulating current loss due to incomplete transposition.

Contents of the invention

The purpose of the utility model is to overcome the above disadvantages, thereby providing a transposition wire for the locomotive main transformer, which can improve the space utilization rate of the winding, reduce the volume, increase the capacity and reduce the cost; and can reduce the circulating current caused by the leakage magnetic field Additional losses and eddy current losses.

The main solution of the utility model is achieved in this way:

The utility model is composed of an acetal enamelled flat wire and an insulating paper tape, and is characterized in that the acetal enameled flat wire is combined into two rows of enamelled flat wires whose wide surfaces are in contact with each other. Make the same turning and transposition along the narrow side as below to form transposed enameled wire bundles, and continuously and tightly wind multi-layer insulating paper tapes outside the transposed enameled wire bundles.

Compared with the prior art, the utility model has the following advantages:

The utility model has a simple, compact and reasonable structure; it can improve the utilization rate of the winding space; reduce the circulation current loss; save a lot of man-hours, because the transposition wire is formed by mechanical twisting and transposition, so the time for winding the transformer coil can be greatly shortened ;The coil wound by the transposed wire has beautiful appearance and accurate coil size, thus improving the quality of the finished product; it can greatly reduce the eddy current loss, and the eddy current loss is proportional to the cross-section of a single wire core, so a single wire with a small cross-section is stranded The combined transposition wire can greatly reduce the eddy current loss in the winding; since the eddy current loss is proportional to the square of the frequency, it is very important to greatly reduce the eddy current loss for some coils containing higher harmonics meaning.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a side view of the structure of the utility model.

Detailed ways

Below the utility model will be further described in conjunction with the embodiment in the accompanying drawing:

The utility model is mainly composed of an acetal enamelled flat wire 1 , a transposed enameled wire bundle 2 and an insulating paper tape 3 .

The utility model is mainly composed of an acetal enamelled flat wire 1 and an insulating paper tape 3 . The acetal enamelled flat wire 1 is combined into two rows of enamelled flat wires whose wide surfaces are in contact with each other. As required, the upper and lower sides of the two rows of enamelled flat wires are transposed in the same direction along the narrow side, and the The outside of the enameled wire harness 2 after positioning is continuously and tightly wound with multi-layer insulating paper tape 3 . The coil wound by the utility model has beautiful appearance and accurate coil size.

Claims (1)

1. A transposition wire for a locomotive main transformer, comprising an acetal enamelled flat wire (1) and an insulating paper tape (3), characterized in that the acetal enameled flat wire (1) is combined into a wide-surface mutual The two rows of enamelled flat wires that are in contact with each other are transposed into enameled wire bundles (2) on the top and bottom of the two rows of enameled flat wires in the same direction along the narrow surface, and the enameled wire bundles (2) are wound with multi-layer insulation paper tape (3).

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