Magnet wires can be classified according to their basic composition

Sometimes it is also classified according to the particularity of its use, such as self-adhesive enameled wire, refrigerant-resistant enameled wire, etc. Due to the large insulation thickness and low High quality China Polyurethane Enameled Copper Wire heat resistance, most of them have been replaced by enameled wires. Later, polyvinyl formal enameled wire came out, and its mechanical properties were greatly improved. Magnet wires can be classified according to their basic composition, conductive core and electrical insulation layer.

In the early days, cotton yarn and silk, called yarn covered wire and silk covered wire, were used in motors and electrical appliances. The paint film can fall off by itself in the high-temperature tin enamel tank, making the copper wire easy to solder. But its mechanical strength is poor, and it can only be used in micro motors and small motors. It can be directly used in motor windings and is called high-strength enameled wire. In recent years, the rapid development is the film wrapping wire, mainly polyester film and polyimide film wrapping wire. Enameled wire can be divided into polyester enameled wire, polyesterimide enameled wire, polyamideimide enameled wire, polyimide enameled wire, polyesterimide/polyamideimide enameled wire, corona resistant enameled wire, and oily enameled wire according to the insulating varnish used.; the latter includes the requirements of stretching, bending and abrasion during winding and embedding, as well as swelling and erosion during dipping and drying.

The former includes its shape, specifications, ability to work at high temperatures for short and long periods of time, as well as withstanding strong vibration and centrifugal force at high speeds in some occasions, resistance to corona and breakdown under high voltage, and resistance to chemicals in special atmospheres Corrosion, etc. With the development of weak current technology, there has been a self-adhesive enameled wire, which can obtain a coil with better integrity without dipping and baking. Paper-covered wire still occupies a considerable position in the wrapped wire, which is mainly used in oil-immersed transformers. It needs to be covered with cotton yarn when used. As the application of enameled wire is becoming more and more extensive, the requirements are becoming stricter, and composite enameled wire has been developed. The existing inorganic insulated wires can be further divided into glass film wires, oxide film wires and ceramic wires. Generally, it is divided into enameled wire, winding wire, enameled winding wire and inorganic insulated wire according to the insulating material and manufacturing method used in the electrical insulation layer.

There are also combined wires, transposed wires and so on.What is enameled wire? Enameled wire, a type of magnet wire, generally refers to insulated wires used to make coils or windings in electrical products. The paint film has poor abrasion resistance and cannot be directly used to make motor coils and windings. The oil-paper insulation formed at this time has excellent dielectric properties, is low in price, and has a long life. The enameled wire is coated with a corresponding lacquer solution on the outside of the conductor, and then it is made by solvent volatilization and solidification of the lacquer film and cooling. Also called winding wire. Magnet wires must meet the requirements of a variety of uses and manufacturing processes. Inorganic insulated wire When the heat resistance rating exceeds the limit of organic materials, inorganic insulating varnish is usually used. In addition, in order to avoid the trouble of first removing the paint film during soldering, direct soldering enameled wire has been developed. Currently it is only used as a high-frequency winding wire.

Recently, there is also a mica tape-coated polyesterimide film-coated rectangular copper wire used for wind power generation. The earliest enameled wire was oily enameled wire, made of tung oil. The inner and outer paint films are composed of different polymer materials, such as polyesterimide/polyamideimide enameled wire. In the large and medium-sized winding wires, when the heat resistance grade is higher and the mechanical strength is higher, the glass fiber covered wire is also used, and the appropriate adhesive paint is used in the manufacture. Paint, acetal paint, polyurethane enameled wire, etc. Wrapped wire An important variety in winding wire