| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.39 ( October 1998 ) Electrical Steel ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Heat-Proof Domain-Refined Grain-Oriented
Electrical Steel Keiji Sato, Masayoshi Ishida, Eiji Hina |
| Synopsis: Kawasaki Steel has recently developed a new type of heat-proof domain-refined grain-oriented electrical steel (RGHPD) which is characterized by deterioration-free properties even after stress relief annealing at high temperature. This steel is obtained by refining 180 magnetic domains through linear grooves introduced by applying localized electrolytic etching on the surface of the steel sheet after final cold rolling. The iron loss of this new material product is 10% less than that of steel which has not undergone domain refining. Iron loss in wound core transformers using this material is also about 10% less than that of conventional transformers. Moreover, this material can be used for stacked core transformers and is expected to contribute significantly to energy conservation and savings in the future as a result of improved transformer efficiency. |
| TextiPDF: 8P/403kbj |