Aluminum is not only cheaper than copper, but also as an excellent conductor, it has better flexibility than copper. Its density is only 1 / 3 of that of copper, and the electric energy conducted by aluminum with the same weight is twice that of copper. Therefore, aluminum wire needs more energy than copper wire to conduct the same current. Compared with copper, another advantage of enamelled aluminum winding wire is that Enma standard identifies aluminum wire as enamelled wire with higher thermal grade. For example, if copper wire is replaced by aluminum wire and high temperature polyester composite polyimide topcoat is used, the thermal grade can be raised from 200 to 220. The reason is that the catalytic effect of copper ions promotes the aging of the film during the aging experiment. The enameling principle of aluminum wire is very similar to that of copper wire. The difference is mainly due to the easy oxidation and low melting point of aluminum rod, which leads to more severe cleaning and lower curing temperature or lower VD value. It can be summarized as follows:
1. Both copper and aluminum have good conductivity, thermal conductivity and corrosion resistance, so they are often used to make various wires, cables and reflow parts. The density of aluminum is 2.7g/cm3, while the density of copper is 8.9g/cm3. The softness of aluminum conductor is better than that of copper conductor. In contrast, it is easier to make coils. Because there is a strong oxide film on the surface of enameled aluminum wire, aluminum conductor is more flexible than copper conductor, Good insulation effect and long service life.
2. Because of its good insulation, the heat resistance temperature of aluminum wire is 20 ℃ higher than that of copper wire.
3. The biggest advantage of using aluminum wire is that the weight is 1 / 3 lighter than copper wire, which greatly reduces the production cost and is easy to adhere to the fixture.
Enamelled aluminum winding wire is mainly used in fields with relatively simple process technology
1. Microwave oven transformer and reactor.
2. Degaussing coil.
3. Industrial fan motor, etc.
4. Industrial sewing machine.
5. Ups and power supply.
6. Power transformer.
7. Small household motor.
8. Air conditioning Motor SP motor.
9. Washing induction motor
10. Ballast industry
11. Electric welding machine
12. Ring transformer
