Views: 0 Author: Site Editor Publish Time: 2022-10-13 Origin: Site
The most used places for enameled flat wire are power transformers, AC UHV transformers, and DC converter transformers all use enameled flat wires instead of round wires. The most used are acetal enameled copper flat wires, heat-resistant type Enamelled flat wires are used in dry-type transformers.
What is the development history of polyvinyl acetal enameled flat wire?
What are the advantages of using polyvinyl acetal enameled flat wire?
What is the performance of polyvinyl acetal enameled flat wire?
General high-strength polyvinyl acetal enameled flat wire has good oil resistance, but in oil-immersed transformers and oil-filled motors, the oil resistance of different enameled wires is obviously different because the enameled wire is immersed in high temperature and airtight oil for a long time. Judging from the report, the United States made such a conclusion at the 4th Insulation Materials Conference in 1963: in all tests, regardless of whether paper is used, the enamel layer of the polyester enameled wire is completely cracked, and it is related to the transformer oil system. are completely incompatible; on the contrary, acetal enameled wire and polyacrylic enameled wire (Loot) n more comprehensively maintained the original performance after the test. According to the Japanese report in 1973, acetal wire, which accounts for 30% of the total enameled wire variety, is mainly used in oil-immersed transformers, while polyester has been widely used in E-class motors and dry-type transformers. In Europe, too, oil-immersed transformers all use polyvinyl acetal enameled flat wire.
1. The mold of polyvinyl acetal enameled flat wire also needs to be cleaned after using for a period of time, but it can generally be maintained for days. Compared with the need to replace the felt after use, it can reduce the waste silk when changing the felt, and save the paint liquid absorbed by the felt.
2. The mold itself of polyvinyl acetal enameled flat wire is simple in structure and low in cost. A set of molds can be used for seven or eight years or more without damage after being matched. However, the annual consumption of felt in the enameled wire factory is quite considerable. of.
Polyvinyl acetal enameled flat wire has high heat resistance, and also has the characteristics of refrigerant resistance, severe cold resistance, radiation resistance, high mechanical strength, stable electrical properties, good chemical resistance and refrigerant resistance, and strong overload capacity. Widely used in refrigerator compressors, air conditioner compressors, power tools, explosion-proof motors and motors and electrical appliances used in high temperature, high cold, radiation resistance, overload and other conditions
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