This inventor holds 6 USPTO granted patents. Top assignees: Hitachi, Ltd., The Tokyo Electric Power Company, Incorporated. Active years: 1976-1992.
Location History:
- Katsuta, JA (1976 - 1977)
- Katsuta, JP (1979 - 1992)
Company Filing History:
6 out of 42,719 
4 out of 177 Years Active: 1976-1992
Title: Innovations by Yoshihiro Sano
Introduction
Yoshihiro Sano is a notable inventor based in Katsuta, Japan. He has made significant contributions to the field of transformer protection, holding a total of 6 patents. His work focuses on enhancing the safety and reliability of electrical power systems.
Latest Patents
Among his latest patents is a method and system of transformer protection. This innovative approach evaluates parallel admittance currents indicative of the excitation state of a transformer. The evaluation is based on transformer terminal voltages and currents sampled at proper intervals. The system discriminates between internal defects and excitation inrush by analyzing the magnitude of the parallel admittance current. A breaker opening command is issued in response to a judgment of an internal defect. This method enables high-accuracy and high-sensitivity fault detection through simple computation. Another significant patent is a transformer protection system that utilizes data from voltages and currents detected at individual terminals of a transformer. A computer computes driving point admittances or shunt admittances based on this data and predetermined transfer admittances. It determines if an internal fault has occurred when the computed values deviate from pre-set reference values, leading to the disconnection of the transformer from the electric power system.
Career Highlights
Yoshihiro Sano has worked with prominent companies such as Hitachi, Ltd. and Tokyo Electric Power Company. His experience in these organizations has contributed to his expertise in electrical engineering and transformer technology.
Collaborations
He has collaborated with notable coworkers, including Yoshiteru Miki and Masami Okamura. Their joint efforts have further advanced the field of transformer protection.
Conclusion
Yoshihiro Sano's innovations in transformer protection demonstrate his commitment to improving electrical safety and efficiency. His patents reflect a deep understanding of electrical systems and a dedication to advancing technology in this critical area.