Enameled wire has been widely used in the electrical motor, transformer, compressor and other industries. 

Polyester Imide Enameled Copper Wire, also known as PIW (Polyester Imide Wire), is a type of enameled or winding wire used in electrical applications. It consists of solid copper conductors coated with a special enameled insulator made of polyesterimide resin.

Polyesterimide enameled copper wire:
Copper Conductor: the core of this wire is usually made of high quality copper, known for its excellent electrical conductivity. Copper is widely used for its ability to transmit current efficiently.

Polyesterimide Insulation: The enameled insulator on the copper conductor is made of polyesterimide resin. This type of insulation is chosen for its ability to withstand high temperatures and resist environmental factors such as moisture, chemicals and abrasion. The "imide" component of the insulator provides thermal stability, allowing the wire to operate effectively at high temperatures.

Temperature Ratings: Polyesterimide enameled copper wire is known for its high temperature ratings. It can typically handle temperatures in the 200°C to 220°C (392°F to 428°F) range without significant degradation of its electrical performance. This makes it suitable for applications where heat exposure is a concern, such as transformers, motors and various electrical coils.

Electrical insulation: Enameled insulators act as electrical insulators, preventing short circuits and ensuring proper functioning of electrical components and equipment.

Solderability: Polyesterimide enameled copper wire is designed to be solderable and can be easily connected to other electrical components or conductors.

Sizes and Gauges: These wires are available in a variety of sizes and gauges to meet different applications and current-carrying requirements. The choice of wire size depends on the particular electrical device or system in which the wire is used.


Applications for polyesterimide enameled copper wire include:
Transformers: Due to its excellent thermal stability and electrical properties, it is commonly used in the windings of power and distribution transformers.
Electric motors: this wire is used in the windings of electric motors and can withstand the heat generated during motor operation.
Coils: It is used to build coils for a variety of applications, including inductors, solenoids and electromagnetic devices.
Generators: It is used in the windings of generators and alternators.

In summary, polyesterimide enameled copper wire is a special type of wire with a robust insulation system that allows it to operate reliably in high-temperature and demanding electrical applications. Its thermal and electrical properties make it the first choice for many critical electrical components.