Haruhiko Kohyama

Title: Haruhiko Kohyama: Innovator in Magnetic Flux Measurement and Circuit Breaker Technology

Introduction

Haruhiko Kohyama is a prominent inventor based in Tokyo, Japan, known for his significant contributions to the fields of electrical engineering and measurement technology. With a total of 12 patents to his name, Kohyama has developed innovative solutions that enhance the efficiency and reliability of electrical systems.

Latest Patents

Among his latest patents is the "Residual Magnetic Flux Determining Apparatus." This apparatus measures residual magnetic fluxes using a transformer-voltage measurement means, which captures transformer voltages. It incorporates a voltage delay means for delaying the measured signals and a DC-voltage-component calculation means for calculating DC voltage components from the latest transformer-voltage signals over a predetermined time period. Additionally, it features a voltage integration means for calculating voltage-integration signals by performing voltage integration of signals obtained after separating the DC voltage components from the present transformer-voltage signals. The apparatus also includes a magnetic-flux DC-component calculation means and a magnetic flux calculation means for obtaining magnetic flux signals. Finally, a control means is utilized to obtain residual magnetic fluxes based on various signals.

Another notable invention is the "Gas Circuit Breaker," which consists of a grounded tank corresponding to each phase, a bushing, an upper housing, and a lower housing, all mounted on a base supported by a frame. The design allows the lower housing to be moved from an operational position below the plane to a transportation position substantially on the plane.

Career Highlights

Kohyama has worked with prestigious companies, including Mitsubishi Electric Corporation and Mitsubishi Denki Kabushiki Kaisha. His experience in these organizations has allowed him to refine his skills and contribute to groundbreaking technologies in the electrical engineering sector.

Collaborations

Throughout his career, Kohyama has collaborated with notable colleagues, including Hiroki Ito and Yuji Yoshitomo. These partnerships have fostered innovation and the development of advanced technologies in their respective fields.

Conclusion

Haruhiko Kohyama's work exemplifies the spirit of innovation in electrical engineering. His patents reflect a commitment to improving measurement techniques and circuit breaker technology, making significant contributions to the industry.