Foil winding and wire winding are two commonly used methods in transformer winding. Foil winding is mainly used in transformers above 200A, while wire winding is used in transformers below 200A. The two methods have their advantages and disadvantages.

Foil winding is a technique that uses thin layers of copper or aluminum foil as the winding material. Foil winding has a higher fill factor, which means more copper can be placed in the same winding space. This allows for a more compact design and higher power density. However, foil winding is more expensive and requires specialized equipment.

Wire winding, on the other hand, is a technique that uses wire as the winding material. Wire winding is less expensive and more flexible than foil winding. Wire winding is easier to manufacture, and it can be wound by hand or by machine. However, wire winding has a lower fill factor, which means the transformer is larger in size, and it has a lower power density.

In summary, both foil winding and wire winding have their advantages and disadvantages. Foil winding is more compact and has a higher power density, but it is more expensive and requires specialized equipment. Wire winding is less expensive and more flexible, but it has a lower power density and requires more space.

LuShan, est. 1975,  is a Chinese professional manufacturer specializing in power transformers and reactors for 48 years. Leading products are single-phase transformer, three-phase transformers, DC inductors, AC reactors, filtering reactor, expoxy resin high-voltage transformer and intermediate, high-frequency products. Our transformers and reactors are widely used in 10 application areas: rapid transit, construction machinery, renewable energy, intelligent manufacturing, medical equipment, coal mine explosion prevention , excitation system, vacuum sintering, central air conditioning.

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