Why Copper Foil Best for Transformer Windings?
As power equipment evolves toward higher efficiency, miniaturization, and greater reliability, foil windings are progressively replacing traditional wire-wound structures, becoming the mainstream solution for distribution transformers, new energy transformers, and reactors. Among the base materials available for foil windings, copper foil is universally recognized by the industry as the optimal choice. This is not merely an empirical judgment based on conductivity; rather, it is the inevitable result of a profound synergy between material properties and winding architecture. Copper foil demonstrates comprehensive performance advantages across the board—from loss control, space utilization, and heat dissipation efficiency to long-term reliability. - High Electrical Conductivity and Superior Loss Control Its intrinsic conductivity provides the fundamental basis: C1100 copper foil maintains a stable conductivity of 100%–101% IACS and a resistivity of only 0.0172 Ω·mm²/...