KR200221594Y1 - A winding wire used in filament of h.v.trans - Google Patents

Abstract

The present invention relates to a filament winding wire used in a high voltage transformer, the filament winding wire according to the present invention has an excellent effect in terms of elongation and elongation, heat resistance, insulation breakdown voltage and the like.

Conventional conductors in filament winding wires have a structure in which tin or nickel is coated on copper, but the filament winding wires according to the present invention having superior effects as described above are polyesterimide on copper conductors in wires. And double coating polyamideimide thereon.

Description

Filament winding wire for high voltage transformers {A WINDING WIRE USED IN FILAMENT OF H.V.TRANS}

The present invention relates to a wire for filament winding used in high voltage transformer, and more particularly, to a wire for filament winding of high voltage transformer used in a microwave oven and the like.

Conventionally, a wire for a filament winding used in such a high-voltage transformer is usually coated with tin or nickel on copper, which is a conductor in the wire, and then coated with an insulator to form a wire.

However, such a conventional filament winding wire has a breakdown voltage of only 1,500 V, so that the thickness of the conductor or the thickness of the insulation coating must be increased to meet the high-voltage transformer.

In addition, as the insulation class of the high voltage transformer is N class, the silicone rubber and knitted fabric insulated coating used for the existing wire used here meet the conditions of class N, but because the conductor of the core is not suitable for class N, In order for the conductor to meet these conditions, the thickness had to increase.

Therefore, the present invention is thinner than the conventional thickness of the filament winding wire used in the conventional high-voltage transformer, and the characteristics of elongation and elongation, heat resistance, impact resistance, insulation breakdown voltage, pin hole (PIN HOLE) characteristics and fire resistance And the like to provide an excellent wire.

1 is an illustration of a high-voltage transformer is used wire according to the present invention

Figure 2 is a circuit diagram of a high voltage transformer using a wire according to the present invention

Figure 3 is a cross-sectional view of a wire for a conventional filament winding used in high voltage transformer

Figure 4 is a cross-sectional view of the wire for filament winding used in the high voltage transformer according to the present invention

As the wire for filament winding of a conventional high voltage transformer is tin-plated on a copper conductor as shown in FIG. 3, a silicone rubber and a glass fiber braid are coated thereon, and a wire externally treated with a silicone varnish is used.

However, such a conventional wire had a problem as mentioned above, so that the wire according to the present invention has a double coating of polyester imide and polyamide imide on a copper conductor as shown in FIG. Then, the silicone rubber and glass fiber braid were coated on it, and then externally treated with a silicone varnish or externally treated with a heat-curable and plastic material (eg, Teflon) having a grade of 200 degrees Celsius.

The wire according to the present invention having the above-described configuration has excellent heat resistance and dielectric breakdown voltage characteristics compared to the prior art, and in particular, the dielectric breakdown voltage has been improved to about 9,000V, whereas it is 1,500V under the same thickness condition. After the high-voltage transformer assembly, the failure rate of the withstand voltage (reference voltage: 7500V ~ 10,000V) due to the pressing of the pass core is significantly reduced.

Therefore, the wire according to the present invention having such a configuration can have various advantages as described above while reducing the thickness of the wire.

In addition, the wire of the structure used in the prior art has a different insulation grade core wire and insulation coating as described above, and therefore, in order to export to the Americas, it required a lot of cost and test period to satisfy the UL1446 standard of the US safety standard. The wire according to the invention can meet the above criteria and save the above cost and time.

The filament winding wire of the high-voltage transformer according to the present invention has significantly improved insulation breakdown voltage from 1,500V to 9,000V than the conventional wire of the same size, and has other effects of improving elongation and elongation, heat resistance, and decreasing the defective rate. In addition, it is possible to reduce the use of the insulating paper that is used for insulation reinforcement in the conventional high-voltage transformer to reduce the manpower due to cost reduction and the number of processes, such as the wire and assembly by using the wire for winding filament according to the present invention Even the existing high-voltage transformer had a ripple effect such as cost reduction.

Claims (3)

A filament winding wire for use in microwave high voltage transformers, comprising: a conductor made of copper, a coating layer of a double coating of polyester imide and a polyamide imide, and a coating layer on the microwave high pressure transformer. Wire for winding filament. The wire for filament winding according to claim 1, wherein the coating layer is externally treated with a silicone varnish on a portion composed of silicone rubber and glass fiber braid. The filament winding wire of claim 1, wherein the coating layer is made of a heat-curable and plastic material having a grade of 200 degrees Celsius.