Amorphous alloy transformers indeed utilize copper as the winding material during their design and manufacturing processes. Some models adopt a fully copper winding structure, and the copper content and winding design are optimized based on the transformer's capacity and performance requirements. Here is a detailed analysis:

　　As a type of low-loss and high-efficiency power transformer, the core of an amorphous alloy transformer lies in the use of amorphous alloy materials for its iron core. However, in the construction of a transformer, besides the iron core, the windings are also a crucial component. Windings are typically made of conductive materials such as copper or aluminum and are used to transmit electrical energy.

　　There exists a fully copper series of amorphous alloy transformers, meaning their windings are made of copper. Copper boasts excellent electrical conductivity, which can reduce the resistance of the windings and thus minimize copper losses (i.e., energy losses caused by winding resistance). Compared to aluminum windings, copper windings generally offer superior advantages in terms of electrical conductivity, thermal stability, and mechanical strength, contributing to the overall efficiency and reliability of the transformer.

　　During the design phase of an amorphous alloy transformer, the material and specifications of the windings are determined based on its rated capacity, voltage level, and performance requirements. For high-capacity and high-performance amorphous alloy transformers, adopting fully copper windings is a common choice to meet their stringent demands for electrical energy transmission efficiency and stability.