Aluminum core magnet wire

The aluminum core electromagnetic wire, as its name suggests, refers to the electromagnetic wire with aluminum as the core, and the magnet wire used to manufacture the insulated wire of the coil or winding in the electrical product. Also known as the winding wire. The 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.

The aluminum core magnet wire can be classified according to its basic composition, conductive core and electrical insulation layer. Generally, it is classified into an aluminum core enameled wire, an aluminum core wrapped wire, an aluminum core 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 of the aluminum core electromagnetic wire is made by coating the corresponding paint solution on the outside of the conductor, and then volatilizing the solvent and curing and cooling 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 electromagnetic wire 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.

The winding wire of the electromagnetic wire: an important variety in the winding wire. Early use of cotton yarn and silk, known as yarn wrapped wire and wire wrapped wire, was used in motors and electrical appliances. Due to the large thickness of the insulation and low heat resistance, most have been replaced by enameled wires. Currently only used as a high frequency winding wire. In the large and medium-sized winding wires, when the heat resistance level is high and the mechanical strength is large, the glass fiber covered wire is also used, and the appropriate adhesive paint is used in the manufacture.

In the wrapped wire, the paper covered wire still occupies a considerable position, mainly used in oil-immersed transformers. The oil-paper insulation formed at this time has excellent dielectric properties, is inexpensive, and has a long life. In recent years, the film has been developed more rapidly, mainly including polyester film and polyimide film wrapped wire. Recently, there are also mica tape-packed polyesterimide film wrapped copper wire for wind power generation.

Inorganic insulated wire for aluminum core magnet wire: When the heat resistance grade is required to exceed the limit of organic materials, it is usually coated with inorganic insulating varnish. The existing inorganic insulated wires can be further classified into glass film wires, oxide film wires, ceramic wires, and the like. There are also combined wire transposing wires and the like.

Due to the increasing application of the enameled wire of the aluminum core magnet wire, the requirements are becoming stricter, and 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. Therefore, aluminum core magnet wire is also increasingly used in various related industries, and the industrial status of aluminum core magnet wire is also irreplaceable.