Location History:
- Amagasaki, JP (1989 - 1996)
- Chiyoda-ku, JP (2017 - 2020)
- Tokyo, JP (2015 - 2024)
Company Filing History:
21 out of 15,928 
11 out of 516 
2 out of 21,351 
Years Active: 1989-2025
Title: Kimiyuki Koyanagi: Innovator in Power Conversion Technologies
Introduction: Kimiyuki Koyanagi is a prominent inventor based in Chiyoda-ku, Japan, with a remarkable portfolio of 23 patents. His work focuses primarily on advancements in power conversion devices, showcasing his dedication to innovation in the electrical engineering field.
Latest Patents: Among Koyanagi's latest inventions is a sophisticated power conversion device. This device features a series unit comprising two switching elements and multiple DC capacitors connected in parallel. The design ensures that the positive and negative terminals are aligned on the same side, optimizing the component layout. Notably, a busbar, other than the one connected to the farthest DC capacitor, includes an inductance adjustment portion that provides a bypass, enhancing performance.
Another noteworthy patent is a power converter equipped with an improved cooling mechanism. This power converter includes a reactor with enhanced cooling capabilities for both the core and winding. The reactor is specifically designed with a rectangular parallelepiped core portion located on a larger cooling surface, allowing for more effective heat management. Additionally, the winding, which is wrapped around the core and cooling member, provides a reliable connection to a power conversion module.
Career Highlights: Koyanagi's professional journey includes significant contributions while working at leading companies such as Mitsubishi Electric Corporation and Toshiba Mitsubishi-Electric Industrial Systems Corporation. His experience at these firms has played a vital role in shaping his innovative projects and patent contributions.
Collaborations: Throughout his career, Koyanagi has collaborated with esteemed colleagues, including Takushi Jimichi and Masahiro Kinoshita. These partnerships have facilitated the development of impactful technologies, pushing the boundaries of electrical engineering and power systems.
Conclusion: Kimiyuki Koyanagi stands out as a key figure in the realm of power conversion innovations. His extensive patent portfolio and contributions to esteemed corporations illustrate a commitment to advancing technology. As the demand for efficient power systems continues to rise, Koyanagi's work promises to play a crucial role in shaping the industry's future.