The difference between enameled wire and magnet wire


Posted April 22, 2021 by enameledwire

The early enameled wire was oily enameled wire, made of tung oil.
 
Enameled wire is a category of electromagnetic wire, usually refers to the insulated wire used to manufacture coils or windings in electrical products.

There are also combined wires, transposed wires, etc. The inner and outer paint films are composed of different polymer materials, such as polyesterimide/polyamideimide enameled wire. 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. The oil-paper insulation formed at this time has excellent dielectric properties, is low in price, and has a long life. But its mechanical strength is poor, and it can only be used in micro motors and small motors.. It needs to be covered with cotton yarn when used. The paint film has poor abrasion resistance and cannot be directly used to make motor coils and windings. In addition, in order to avoid the trouble of first removing the paint film during soldering, direct solder enameled wire has been developed.

Inorganic insulated wire When the heat resistance level exceeds the limit of organic materials, inorganic insulating varnish is usually used. Currently it is only used as a high-frequency winding wire. Generally, it is divided into enameled wire, wound wire, enameled wire and inorganic insulated wire according to the insulating material and manufacturing method used in the electrical insulating layer. 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. Also called winding wire.

The early enameled wire was oily enameled wire, made of tung oil.

Magnet wire can be classified according to its basic composition, conductive core and electrical insulation layer. The existing inorganic insulated wires can be further divided into glass film wires, oxide film wires and ceramic wires. Later, polyvinyl formal enameled wire came out, and its mechanical properties were greatly improved.; the latter includes requirements for stretching, bending and abrasion during winding and embedding, as well as swelling and erosion during dipping and drying. In the early days, cotton yarn and silk, called yarn covered wire and silk covered wire, were used in motors and electrical appliances.

In recent years, the rapid development is the film wrapping wire, mainly polyester film and polyimide film wrapping wire.

The magnet wire must meet the requirements of a variety of uses and manufacturing processes. The paint film can fall off by itself in the high-temperature tin enamel tank, making the copper wire easy to solder. It can be directly used in motor windings and is called high-strength enameled wire.

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.

Winding wire An important variety of winding wires.

Enameled wire is made by coating the corresponding lacquer solution on the outside of the conductor, and then volatilizing the solvent and solidifying and cooling the paint film. Due to the large insulation thickness and low heat resistance, most of them have been replaced by enameled wires. Sometimes it is also classified according to the particularity of copper winding wire its use, such as self-adhesive enameled wire, refrigerant-resistant enameled wire, etc.

As the application of enameled wire is becoming more and more extensive, the requirements are becoming stricter, and composite enameled wire has been developed.

Recently, there is also a mica tape-coated polyesterimide film-coated rectangular copper wire used for wind power generation.

Paper-covered wire still occupies a considerable position in the winding wire, mainly used in oil-immersed transformers. In the large and medium-sized winding wires, when the heat resistance grade is higher and the mechanical strength is higher, glass fiber covered wires are also used, and appropriate adhesive paint is used in the manufacture. Paint, acetal paint, polyurethane enameled wire, etc
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Last Updated April 22, 2021