This inventor holds 2 USPTO granted patents. Top assignees: Hitachi, Ltd., The Tokyo Electric Power Company, Incorporated. Active years: 1988-1992.
Company Filing History:
2 out of 42,719 
2 out of 177 Years Active: 1988-1992
Title: Keizo Inagaki: Innovator in Transformer Protection Technology
Introduction
Keizo Inagaki is a notable inventor based in Hitachi, Japan. He has made significant contributions to the field of transformer protection technology. With a total of 2 patents, Inagaki's work focuses on enhancing the safety and reliability of electrical power systems.
Latest Patents
Inagaki's latest patents include a method and system of transformer protection. This innovative approach evaluates parallel admittance currents indicative of the apparent 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 responding to 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 patent involves a transformer protection system where data of voltages and currents detected at individual terminals of a transformer are supplied to a computer. The computer computes driving point admittances or shunt admittances based on the voltage and current data. It decides that an internal fault has occurred when the values deviate from pre-set reference values, thereby disconnecting the transformer from the electric power system.
Career Highlights
Inagaki has worked with prominent companies such as Hitachi, Ltd. and Tokyo Electric Power Company. His experience in these organizations has allowed him to develop and refine his innovative ideas in transformer protection.
Collaborations
Inagaki has collaborated with notable coworkers, including Yoshihiro Sano and Yoshifumi Oura. Their combined expertise has contributed to advancements in the field of electrical engineering.
Conclusion
Keizo Inagaki's contributions to transformer protection technology demonstrate his commitment to improving electrical safety. His innovative patents reflect a deep understanding of the complexities involved in power systems. Inagaki's work continues to influence the industry positively.