Aluminum magnet wire is a magnet wire with aluminum as its core. Magnet wire is used to make insulated wires for coils or windings in electrical products. Also known as winding wire. Magnet wires must meet the requirements of various applications and manufacturing processes. The former includes its shape, specifications, ability to operate at high temperatures for short and long periods, as well as acceptance of intense oscillations and centrifugal force at high speeds on some occasions, resistance to corona, and breakdown under high voltage, and resistance to special atmospheres. Chemical corrosion, etc.; the latter includes requirements for stretching, bending, and abrasion during winding and embedding, as well as swelling and erosion during dipping and drying.
Aluminum magnet wire can be classified according to its basic composition, conductive core, and electrical insulation layer. Generally, it is divided into aluminum core enameled wire, aluminum core wound wire, aluminum core enameled wire, and inorganic insulated wire according to the insulating material and production method used for the electrical insulation layer.
Aluminum magnet wire: The conductor is coated into a corresponding lacquer solution, then the solvent is evaporated and the lacquer film is solidified and cooled. The enameled wire can be divided into polyester enameled wire, polyester imide enameled wire, polyamide-imide enameled wire, polyimide enameled wire, polyesterimide/polyamide-imide enameled wire, corona resistant enameled wire, and oiliness according to the insulating varnish used. Lacquer, acetal paint, polyester enameled wire, etc. Sometimes it is also classified according to the particularity of its use, such as self-adhesive enameled wire, refrigerant resistant enameled wire, etc.
The earliest magnet wire enameled wire is oily enameled wire, made of tung oil. The paint film has poor abrasion resistance and cannot be directly used to make motor coils and windings. It needs to be used with a cotton yarn wrapping layer. Later, the polyvinyl formal enameled wire came out, and its mechanical function was greatly improved. It can be directly used in motor windings and is called high-strength enameled wire.
With the development of weak current technology, it has shown that it has self-adhesive enameled wire, which can obtain coils with better integrity without dipping and baking. However, its mechanical strength is poor, and it can only be used in micro motors and small motors. Also, to prevent the trouble of removing the paint film during soldering, direct soldering enameled wire has been developed. The paint film can drop by itself in the high-temperature tin enamel tank, making the copper wire easy to solder.
Magnet wire winding wire: an important type of winding wire. The cotton yarn and silk used in the early stage are called yarn-covered wire and silk-covered wire, which were once used in motors and electrical appliances. Because of the large insulation thickness and low heat resistance, most of them have been replaced by enameled wires. Now it is only used as a high-frequency winding wire. In the large and medium-sized winding wires, when the heat resistance level is higher and the mechanical strength is higher, glass fiber covered wires are also used, and they are made with appropriate adhesive paint.
Paper-covered wire still occupies a proper position in the wrapped wire and is mainly used in oil-immersed transformers. The oil-paper insulation formed at this time has excellent dielectric functions, is inexpensive, and has a long life. In recent years, the more rapid development is the film wrapping wire, mainly polyester film and polyimide film wrapping wire. Recently, there is also a mica tape-coated polyesterimide film-coated rectangular copper wire used for wind power generation.
Aluminum magnet wire inorganic insulated wire: When the heat resistance level exceeds the limit of organic materials, inorganic insulating paint is generally used. The existing inorganic insulated wires can be further divided into glass film wires, oxide film wires, and ceramic wires. There are also combined wires, wire and cable mesh wires in our country, etc.
Because aluminum magnet wire is being used more and more widely and the requirements are becoming stricter, composite enameled wires have also been developed. The inner and outer paint films are composed of different polymer materials, such as polyetherimide/polyamide-imide enameled wire. Therefore, aluminum magnet wire is increasingly used in various related occupations, and the industrial position of aluminum magnet wire is no longer a substitute.