Location History:
- Saitama-ken, JP (1999)
- Koshigaya, JP (2000)
Company Filing History:
2 out of 52,751 
1 out of 177 Years Active: 1999-2000
Title: The Innovations of Shoichi Irokawa
Introduction
Shoichi Irokawa is a notable inventor based in Saitama-ken, Japan. He has made significant contributions to the field of power conversion technology, holding two patents that showcase his innovative approach to electrical engineering.
Latest Patents
Irokawa's latest patents include a power converter that features first and second power conversion units connected by a d.c. reactor. The first unit is a converter with arms consisting of thyristors arranged in a bridge configuration. The second unit functions as an inverter, where arms are formed by a series combination of a thyristor and a self-excited switch unit that includes a GTO for generating a commutation voltage for the thyristor. Another significant patent is a power conversion system that incorporates a series of converter transformers. The AC side windings of these transformers are connected in series to an AC power system. This system also includes multiple series-connected voltage source type self-commutated converters, which convert AC power into DC power or vice versa. Each converter is linked to a DC side winding of the transformer, and the system is equipped with a control mechanism to ensure that the DC voltages align with specified reference values.
Career Highlights
Throughout his career, Irokawa has worked with prominent companies such as Toshiba Corporation and The Tokyo Electric Power Company, Incorporated. His experience in these organizations has allowed him to develop and refine his expertise in power conversion technologies.
Collaborations
Irokawa has collaborated with notable colleagues, including Noriko Kawakami and Hirokazu Suzuki. Their joint efforts have contributed to advancements in the field of electrical engineering.
Conclusion
Shoichi Irokawa's innovative work in power conversion technology has led to significant advancements in the industry. His patents reflect a deep understanding of electrical systems and a commitment to improving power conversion methods.