Location History:
- Aichi-ken, JP (2009)
- Nagoya, JP (1990 - 2011)
Company Filing History:
2 out of 3 
2 out of 21,351 
1 out of 90,673 
Years Active: 1990-2011
Title: **Shigeru Okuma: Innovator in Permanent Magnet Technologies**
Introduction
Shigeru Okuma, located in Nagoya, Japan, is a notable inventor with a focus on the development of advanced electrical machinery. With an impressive portfolio of five patents, his innovative contributions have significantly impacted the field of permanent magnet technologies.
Latest Patents
One of Okuma's latest patents revolves around a permanent magnet rotating machine. This invention incorporates permanent magnets that are inserted into magnet insert holes formed in the main magnetic pole of a rotor. The rotor's outer circumferential surface features a first portion that intersects with a d-axis and a second portion that intersects with a q-axis. Notably, the radius of curvature of the second outer circumferential surface portions is larger than that of the first. Additionally, recesses are strategically formed in the second outer circumferential surface portions to align with end walls of the adjacent magnet insert holes. The construction of this machine is defined by specific mechanical angles related to the rotor's pole pairs, demonstrating Okuma's meticulous attention to precision in design.
Career Highlights
Throughout his career, Shigeru Okuma has worked with reputable companies such as Aichi Electric Co. and Mitsubishi Denki Kabushiki Kaisha. His experiences at these institutions have greatly informed his understanding and innovative strategies in electrical engineering.
Collaborations
Okuma has collaborated with notable colleagues such as Shinji Doki and Mutsuo Tomita. These partnerships have fostered a collaborative environment that promotes the exchange of ideas and subsequent innovations.
Conclusion
Shigeru Okuma stands as a testament to the spirit of innovation within Japan's engineering sector. With his groundbreaking inventions and collaborations with leading professionals, he continues to contribute to advancements in permanent magnet technology, shaping the future of electrical machinery. His dedication to his craft and the impact of his patents highlight the values of creativity and precision in the quest for technological progress.