Machida, Japan

Hiroyuki Irokawa

This inventor holds 1 USPTO granted patent. Top assignee: Hitachi, Ltd.. Active years: 1990.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hiroyuki Irokawa. Retrieved from https://idiyas.com/inventor/hiroyuki-irokawa

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Calculating rank

% Patents Active = 100.0

Average Co-Inventor Count = 5.0

ph-index = 1

Forward Citations = 11(Granted Patents)


Company Filing History:


Years Active: 1990

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1 patent (USPTO):Explore Patents

Title: Hiroyuki Irokawa: Innovator in Static Var Compensation Technology

Introduction

Hiroyuki Irokawa is a notable inventor based in Machida, Japan. He has made significant contributions to the field of electrical engineering, particularly in the development of static var compensators. His innovative work has led to the creation of a patented technology that enhances the efficiency of electric power systems.

Latest Patents

Hiroyuki Irokawa holds a patent for a "Static Var Compensator with Thyristor Control." This invention includes a transformer connected to an electric power system, along with a series circuit made up of a reactor and a thyristor bulb. The system features a voltage detection device that samples the voltage of the electric power system multiple times per cycle. The sampled values are stored in a register, and an adder calculates the absolute values of these samples. The firing angle of the thyristor bulb is controlled based on the deviation from a voltage setting device, ensuring optimal performance in managing reactive power.

Career Highlights

Hiroyuki Irokawa is currently employed at Hitachi, Ltd., a leading company in technology and engineering. His work at Hitachi has allowed him to apply his innovative ideas in practical applications, contributing to advancements in electrical systems.

Collaborations

Throughout his career, Hiroyuki has collaborated with esteemed colleagues, including Hidehiko Shimamura and Hirofumi Tsutsumi. These collaborations have fostered a creative environment that encourages the exchange of ideas and technological advancements.

Conclusion

Hiroyuki Irokawa's contributions to the field of electrical engineering, particularly through his patented static var compensator technology, demonstrate his commitment to innovation. His work continues to influence the efficiency of electric power systems, showcasing the importance of inventive minds in advancing technology.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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