Enameled Wire is a category of magnet wire, and general […]
Enameled Wire is a category of magnet wire, and generally refers to an insulated wire used to make coils or windings in electrical products. Also known as the winding wire.
Magnet_wire must meet the requirements of various uses and manufacturing processes. The former includes its shape, specifications, ability to work at high temperatures for short and long periods of time, and withstands strong vibrations in certain occasions and centrifugal forces at high speeds, withstands corona and breakdown at high voltages, and with chemical resistance under special atmospheres. Corrosion, etc.; the latter includes the requirements of being subjected to stretching, bending and abrasion during winding and weaving, as well as swelling and erosion during dipping and drying.
Magnet wires can be classified according to their basic composition, conductive core and electrical insulation. Generally, it is divided into an enameled wire, a wrapped wire, an enamel wrapped wire, and an inorganic insulated wire according to the insulating material and the manufacturing method used for the electrical insulating layer.
The enameled wire is coated with a corresponding paint solution on the outside of the conductor, and then volatilized by the solvent and cured and cooled by the paint film. The 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 according to the insulating paint used. Paint, acetal paint, polyurethane enameled wire, etc. Sometimes classified according to the specificity of their use, such as self-adhesive enameled wire, anti-freeze enameled wire.
The earliest enameled wire is an oily enameled wire made of tung oil. The paint film has poor wear resistance and cannot be directly used for manufacturing motor coils and windings. When used, it is necessary to add a cotton yarn wrap layer. Later, the polyvinyl acetal enameled wire was introduced, and its mechanical properties were greatly improved. It can be directly used for motor windings, and it is called high-strength enameled wire.
With the development of weak current technology, a self-adhesive enameled wire has appeared, which can obtain a better overall coil without immersion and baking. However, its mechanical strength is poor, and it can only be used in micro motors and small motors. In addition, in order to avoid the trouble of removing the paint film at the time of soldering, a straight solderable enameled wire has been developed, and the coating film can be detached by itself in a high-temperature tin-tin bath to make the copper wire easy to solder.
Due to the increasing application of enameled wire and the increasingly strict requirements, a composite enameled wire has also been developed. The inner and outer paint films are composed of different polymer materials, such as polyesterimide/polyamideimide enameled wire.