Company Filing History:
4 out of 42,508 
2 out of 195 
Years Active: 1981-1989
Title: Yosio Furukawa: Innovator in Variable-Speed Power Systems
Introduction
Yosio Furukawa is a notable inventor based in Hitachi, Japan. He has made significant contributions to the field of power generation and motor systems. With a total of 4 patents, his work focuses on enhancing the efficiency and stability of power systems.
Latest Patents
Furukawa's latest patents include a variable-speed power generating system and a variable-speed generator/motor system. The variable-speed power generating system features a generator that is electrically connected to an electric power system through a frequency converter. It includes a phase detector that generates an output signal representing a slip frequency, allowing for precise control of the generator's operation. The system ensures that when disconnected from the power system, the frequency applied remains within a predetermined range.
The variable-speed generator/motor system comprises a generator/motor with primary and secondary windings. It includes a main circuit interposed between the power system and the generator/motor, along with an excitation circuit that utilizes a frequency converter. This system is designed to maintain stable operation during disturbances in the power system by producing a consistent frequency signal.
Career Highlights
Furukawa has worked with prominent companies such as Hitachi, Ltd. and Kansai Electric Power Co., Inc. His experience in these organizations has allowed him to develop innovative solutions in power generation and motor technology.
Collaborations
Throughout his career, Furukawa has collaborated with notable colleagues, including Yasuhiro Yasaka and Osamu Nagura. Their combined expertise has contributed to advancements in the field of electrical engineering.
Conclusion
Yosio Furukawa's contributions to variable-speed power systems demonstrate his commitment to innovation in electrical engineering. His patents reflect a deep understanding of power generation and motor control, making him a significant figure in the industry.