Location History:
- Chita-gun, JP (2014)
- Kasugai, JP (2014 - 2015)
- Kariya, JP (2017 - 2021)
Company Filing History:
Years Active: 2014-2021
Title: Kiyoshi Fujii: Innovator in Electrical Machine Control
Introduction
Kiyoshi Fujii is a prominent inventor based in Kariya, Japan. He has made significant contributions to the field of electrical machines, holding a total of 11 patents. His work focuses on control apparatuses and methods that enhance the efficiency and functionality of rotating electrical machines.
Latest Patents
Fujii's latest patents include innovative technologies such as a control apparatus and control method for rotating electrical machines. This invention features a rotor position judging unit that detects the rotor position by utilizing induced voltages generated at the respective phases of an armature winding. As the field current flowing through a field winding rises toward a target value, induced voltages are generated at the armature winding phases through the temporal differentiation of a magnetic flux. The rotor position judging unit then determines the rotor position based on a table containing combinations of amplitude ratios and polarities of the induced voltages.
Another notable patent is a control apparatus for rotary electric machines. This apparatus includes a first manipulation unit that controls the voltage phase of a voltage vector applied to an armature winding while managing the field current. This ensures that the deviation between the amplitude of the induced voltage and a predetermined voltage remains within acceptable limits. Additionally, a second manipulation unit controls the field current to maintain the target value for a larger operational region.
Career Highlights
Kiyoshi Fujii is currently employed at Denso Corporation, a leading global automotive components manufacturer. His work at Denso has allowed him to apply his innovative ideas in practical applications, contributing to advancements in automotive technology.
Collaborations
Fujii has collaborated with notable colleagues such as Akimasa Osaki and Hideki Kabune. These partnerships have fostered a creative environment that encourages the development of cutting-edge technologies in the field of electrical engineering.
Conclusion
Kiyoshi Fujii's contributions to the field of electrical machines through his patents and work at Denso Corporation highlight his role as a key innovator. His inventions continue to influence the efficiency and performance of electrical systems in various applications.