CN104795216A - Transformer coil based on composite conductor - Google Patents

Abstract

A transformer coil based on combined wires, the middle part of the coil is wound by a combined wire in the width direction, and the end of the coil is wound by a combined wire in the axial direction. The eddy current loss of the coil and the temperature rise at the end of the coil are considered.

Description

A Transformer Coil Based on Composite Wires

technical field

The invention relates to the field of transformer manufacturing, in particular to a transformer coil based on combined wires.

Background technique

For transformer coils with large currents, paper-wrapped wires with larger specifications are usually used for winding, and winding with paper-wrapped wires will increase the eddy current loss caused by the axial magnetic flux leakage of the wire cake.

Figure 1 shows a coil wound with a combination of widthwise wires in the prior art. Although the coil wound with a combination of widthwise wires can greatly reduce the eddy current loss caused by the axial magnetic leakage in the coil, there is a transverse leakage at the coil head and end. Magnetism, the eddy current loss generated in the coil by the transverse magnetic flux leakage is relatively high, so that the temperature rise of the hot spot at the head and end of the coil is relatively high.

Contents of the invention

The purpose of the present invention is to provide a transformer coil based on combined wires, thereby reducing the eddy current loss of the coil and the temperature rise of the hot spot at the end of the coil.

The technical solution adopted in the present invention is: a transformer coil based on combined wires, which is characterized in that: the middle of the coil is wound by a combined wire in the width direction, and the end of the coil is wound by a combined wire in the axial direction, and the coil end includes a coil head ends and coil ends.

According to the above-mentioned transformer coil based on combined wires, it is characterized in that: the combined wires in the width direction and the combined wires in the axial direction are welded by overlapping.

Compared with the prior art, the invention has the beneficial effects of reducing the eddy current loss of the coil and the temperature rise of the coil end.

Description of drawings

Fig. 1 is a partial cross-sectional view of a coil wound with a combined radial wire in the prior art;

FIG. 2 is a partial cross-sectional view of a transformer coil based on a combined wire provided by an embodiment of the present invention;

Fig. 3 is the front view of the combined wire connection part provided by the embodiment of the present invention;

Figure 4 is a top view of Figure 3.

Detailed ways

The general idea of the present invention is that the middle part of the coil is wound by the combined wire in the width direction, and the end of the coil is wound by the combined wire in the axial direction, thereby reducing the eddy current loss of the coil and the temperature rise of the hot spot at the coil end.

The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

Fig. 2 is a partial cross-sectional view of a transformer coil based on combined wires provided by an embodiment of the present invention.

Referring to Fig. 2, the coil includes a coil middle part and a coil end part, the coil middle part is wound by a combined wire 2 in the width direction, and the coil end part is wound by an axial combined wire 1, and the coil end part includes a coil head end part and a coil end part .

Fig. 3 is the front view of the combined wire connection provided by the embodiment of the present invention; Fig. 4 is the top view of Fig. 3 .

Referring to Fig. 3 and Fig. 4, the width combined wire 2 and the axial combined wire 1 are welded by overlapping; referring to Fig. 3, the axial combined wire 1 is arranged up and down, the width combined wire 2 is arranged inside and outside, and the axial combined wire 1 The upper wire is welded with the width combined wire 2. The inner wire is welded by overlapping, and the axial combined wire 1 and the lower wire are welded with the width combined wire 2. The outer wire is welded by lap .

After the width-wise combined wire 2 and the axial combined wire 1 are welded by overlapping, it is necessary to remove sharp corner burrs and wrap insulation on the welded part.

The invention provides a transformer coil based on combined wires. The middle part of the coil is wound by the combined wires in the width direction, and the end of the coil is wound by the combined wires in the axial direction, thereby reducing the eddy current loss of the coil and the temperature rise of the coil end.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the scope of the present invention. Protection scope, within the spirit and principles of the present invention, any modification, equivalent replacement, improvement, etc., shall be included in the protection scope of the present invention.

Claims (2)

1. based on a transformer coil for composite conductor, it is characterized in that: thiol is by width to composite conductor coiling, and end winding is by axial composite conductor coiling, and described end winding comprises coil head end portion and coil end portion.

2. a kind of transformer coil based on composite conductor according to claim 1, is characterized in that: described width is welded to composite conductor and axial composite conductor by overlapping mode.