Company Filing History:
2 out of 81 
2 out of 66 
1 out of 1 Years Active: 1988-1991
Title: Kiyoo Mitsui: Innovator in Power Conversion Technology
Introduction
Kiyoo Mitsui is a notable inventor based in Sendai, Japan, recognized for his contributions to power conversion technology. With a total of two patents to his name, Mitsui has made significant advancements in the field of semiconductor switching elements.
Latest Patents
Mitsui's latest patents include a PWM power converter using mixed bipolar and static induction transistors. This invention focuses on a PWM power converter that efficiently switches a plurality of bridge-connected semiconductor switching elements based on PWM signals. By combining elements with low ON voltage and small conduction loss with those capable of high-speed switching, this innovation enhances power conversion efficiency. Another significant patent is the optically controlled power converting apparatus. This invention utilizes light trigger/light quench electrostatic induction thyristors as switching elements, allowing for high-speed switching operations when supplied with light trigger and quench pulses. This technology enables predetermined power converting operations by synchronizing the light pulses with pulse width modulation.
Career Highlights
Throughout his career, Mitsui has worked with prominent companies such as Zaidan Hojin Handotai Kenkyu Sinkokai and Tohoku Electric Power Company, Inc. His experience in these organizations has contributed to his expertise in power conversion technologies.
Collaborations
Mitsui has collaborated with notable individuals in his field, including Takashige Tamamushi and Koichi Mitamura. These collaborations have likely fostered innovation and development in his projects.
Conclusion
Kiyoo Mitsui's work in power conversion technology showcases his innovative spirit and dedication to enhancing efficiency in semiconductor applications. His patents reflect a commitment to advancing the field and improving power conversion methods.