The enameled layer in enameled wire plays several important roles:

1. Insulation Protection: The enameled layer provides excellent electrical insulation, preventing short circuits between conductors or between conductors and other materials. This is the most basic function of enameled wire.

2. Heat Resistance: The enameling material of enameled wire usually has high heat resistance, which can maintain its insulation performance in high-temperature environments, making it suitable for high-temperature working environments such as motors and transformers.

3. Corrosion Resistance: The enameled coating protects the copper wire from oxidation and corrosion, extending the wire's lifespan.

4. Mechanical Protection: The enameled layer provides a certain degree of mechanical protection for the copper wire, preventing physical damage and wear.

5. Reduce electromagnetic interference: The insulation layer of enameled wire can reduce electromagnetic interference and improve the performance and stability of electrical equipment.

6. Improved coil compactness:Due to the thinner insulation layer of enameled wire, more coils can be wound in a limited space, increasing the power density of the equipment.

7. Easy to process: During processing and welding, the enameled layer can be removed by heating or mechanical means, which facilitates subsequent connection and use.