Location History:
- Ibarakai, JP (1988)
- Ibaraki, JP (1987 - 1989)
Company Filing History:
7 out of 42,508 
4 out of 195 
1 out of 1 Years Active: 1987-1989
Title: Eiji Haraguchi: Innovator in Power Generation Technologies
Introduction
Eiji Haraguchi is a notable inventor based in Ibaraki, Japan. He has made significant contributions to the field of power generation, holding a total of 7 patents. His work focuses on innovative systems that enhance the efficiency and functionality of power generation technologies.
Latest Patents
One of Haraguchi's latest patents is a variable-speed power generating system. This system comprises a variable-speed generator that is electrically connected to an electric power system. It features a frequency converter and is mechanically coupled to a driver. The system includes a phase detector that generates an output signal representing a slip frequency. This is in response to two inputs: one from the primary winding of the generator and another corresponding to the rotation speed of the driver. The controller regulates the frequency converter based on the phase detector's output, ensuring that the frequency applied to the generator remains within a predetermined range when disconnected from the power system.
Another significant patent is a control system for a variable speed water-wheel generator apparatus. This system utilizes a first function generator that responds to an output command signal, producing a rotation number command signal. A speed adjuster and an adder work together to determine an overall output command signal. The system also includes a second function generator that determines an opening command signal for variable opening vanes, ensuring optimal performance of the generator.
Career Highlights
Eiji Haraguchi has worked with prominent companies such as Hitachi, Ltd. and Kansai Electric Power Co., Inc. His experience in these organizations has contributed to his expertise in power generation technologies and innovation.
Collaborations
Throughout his career, Haraguchi has collaborated with notable individuals, including Hiroto Nakagawa and Akira Bando. These partnerships have likely fostered a creative environment that has led to the development of his innovative patents.
Conclusion
Eiji Haraguchi is a distinguished inventor whose work in power generation technologies has resulted in several impactful patents. His contributions continue to influence the industry and pave the way for future innovations.