Location History:
- Ishioka, JP (1985)
- Mito, JP (2010)
Company Filing History:
Years Active: 1985-2010
Title: Innovations by Shoichiro Koseki
Introduction
Shoichiro Koseki is a notable inventor based in Mito, Japan. He has made significant contributions to the field of power conversion technology. With a total of 2 patents to his name, Koseki's work addresses critical challenges in electrical systems.
Latest Patents
Koseki's latest patents include a "Power converting device and method for controlling the same." This invention focuses on compensating for fluctuations in voltage harmonics at the load connecting point and fluctuations in system current harmonics. The device utilizes a Fourier series expansion unit to execute Fourier series expansion on load current, outputting Fourier coefficients. Additionally, a fundamental component calculating unit determines the positive phase active fundamental component of the load current. This innovative approach allows for effective compensation of fluctuations in system current harmonics and voltage harmonics at the connecting point.
Another significant patent is the "False recovery detection circuit for parallel or serial strings of thyristor converter control systems." This invention includes a voltage detector that identifies the thyristor voltage and a detector output suppressing circuit. The suppressing circuit detects erroneous outputs from the voltage detector and cuts off its output when necessary, enhancing the reliability of the system.
Career Highlights
Koseki is currently employed at Hitachi, Ltd., a leading company in technology and innovation. His work at Hitachi has allowed him to develop and refine his inventions, contributing to advancements in power conversion systems.
Collaborations
Throughout his career, Koseki has collaborated with esteemed colleagues such as Shuji Katoh and Yasuhiro Kiyofuji. These collaborations have fostered an environment of innovation and have led to the development of groundbreaking technologies.
Conclusion
Shoichiro Koseki's contributions to power conversion technology exemplify the impact of innovative thinking in addressing complex electrical challenges. His patents reflect a commitment to enhancing system reliability and efficiency.