▎ 摘　　要

NOVELTY - The transformer has a graphene coating layer coated with graphene by spraying graphene solution on a surface of a metal wire. A primary coil (121) and a secondary coil (122) are arranged along an outer circumferential surface of a long side of a core (110). A set of conductor plates is wound on a core part. The graphene coating layer is formed by thermal chemical vapor deposition (T-CVD) and plasma enhanced chemical vapor extraction (PECVD) process. An insulating layer insulates between the primary and secondary coils. An adhesive layer is formed between the metal wire and the graphene coating layer. A core unit provided for cutting conductor plates in widths. The metal wire is made of an electrically conductive material i.e. aluminum. USE - High-efficient transformer for transforming voltage or current by electromagnetic induction between an iron core and a winding by using a graphene conductor. ADVANTAGE - The transformer has the core that is wound on the conductor plates with irregular sides so as to reduce copper loss by increasing amount of current that flows per unit area with high current density by reducing weight of a conductor used to improve specifications of the transformer, and improves cooling performance. The reliability and stability of the high efficiency transformer are improved. The chemical resistance and corrosion resistance are improved by coating the graphene coating layer on the electric wire. The surface resistance in fluid and a heat transfer pipe is reduced. DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of the high-efficient transformer. Core (110) Coil (120) Primary coil (121) Secondary coil (122)