CN201302837Y - Fundamental insulation winding wire - Google Patents

Abstract

The utility model relates to a basic insulated winding wire, which comprises a copper conductor, an enamelled insulating varnish layer, and a polyester insulating resin extruded sheath. The layer is set outside the enamelled insulating varnish layer. Compared with the prior art, the utility model has a simple structure, and can be used in transformers and high-frequency winding coils instead of the existing enameled wires, so that the utility model has a compact structure and reduces costs.

Description

Basic insulated winding wire

technical field

The utility model belongs to the technical field of enameled wires, which is applied to transformers and high-frequency winding coils whose safety standards conform to UL1950 and IEC60950, in particular to a basic insulated winding wire for transformers.

Background technique

At present, the enameled wires used in transformers are composed of copper conductors and insulating layers. The voltage of enameled wires is low, and interlayer insulating layers and inner skeleton baffles are required, which makes the transformer very large and cannot meet the miniaturization and high frequency requirements of electronic transformers. Require.

Utility model content

The purpose of the utility model is to provide a basic insulated winding wire that can replace the existing enameled wire products for transformers.

The purpose of this utility model can be achieved through the following technical solutions:

The basic insulated winding wire is characterized in that it includes a copper conductor, an enamelled insulating varnish layer, and a polyester insulating resin extruded sheath, the enamelled insulating varnish layer is arranged outside the copper conductor, and the polyester insulating resin extruded The layer is set outside the enamelled insulating varnish layer.

The specification of the copper conductor is Φ0.10-0.19mm.

Compared with the prior art, the utility model has a simple structure. As a transformer and a high-frequency winding coil, the interlayer insulating layer and the inner frame baffle can be omitted, so that the primary and secondary windings are tightly coupled, and the volume of the transformer can be reduced by 1/2 and the weight can be reduced. 1/3, can save material costs and processing costs, and significantly reduce leakage inductance and distributed capacitance, and significantly improve the high frequency characteristics of the transformer. The utility model can replace the existing enameled wire products and be applied to the transformer, which can make the structure more compact.

Description of drawings

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

FIG. 2 is a schematic cross-sectional view of FIG. 1 .

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figure 1 and Figure 2, it is a schematic diagram of the structure of the basic insulated winding wire for the transformer, and the basic insulated winding wire for the transformer is extruded by a copper conductor 1, an enameled insulating varnish layer 2 and a polyester insulating resin Layer 3 composition.

Use a Φ3mm copper rod to be annealed and painted after being drawn by a wire drawing machine, and then the polyester insulating resin is extruded on the outside of the enameled wire through a 20-type single-screw extruder.

The properties of the basic insulated winding wires used for transformers are:

1. Production specification range: 0.10~0.19mm;

2. Temperature resistance class E (120°C) and B (130°C)

3. It has excellent withstand voltage characteristics, the breakdown voltage is greater than 10kV, and has obtained the identification of basic insulation (test voltage 1500Vrms, 1min);

4. It can be directly welded without peeling off the outer layer, and the solderability is 420℃≤2S;

5. Excellent wear resistance and surface smoothness, static friction coefficient ≤ 0.133;

6. Good resistance to chemical solvents and dipping varnishes.

The performance comparison between GPX-1B basic insulated winding wire and common UEW polyurethane enameled wire used in transformers is shown in Table 1.

Table 1

Claims (2)

1. basic insulated winding wire is characterized in that, comprises copper conductor, the enamel insulation enamelled coating, and polyester insulated resin extrudes layer, and described enamel insulation enamelled coating is located at outside the copper conductor, and described polyester insulated resin extrudes layer and is located at outside the enamel insulation enamelled coating.

2. basic insulated winding wire according to claim 1 is characterized in that, the specification of described copper conductor is Φ 0.10～0.19mm.

Images