Company Filing History:
Years Active: 1985-1993
Title: Kazuyoshi Kotake: Innovator in Electric Rolling Stock Technology
Introduction
Kazuyoshi Kotake is a prominent inventor based in Katsuta, Japan. He has made significant contributions to the field of electric rolling stock technology, holding 2 patents that showcase his innovative approach to control systems in electric vehicles.
Latest Patents
Kotate's latest patents include a "Control apparatus for induction motor and electric rolling stock" and an "Electric car control system." The control apparatus for electric rolling stock allows a single associated train to operate in various transit services, including express and accommodation train services. This system utilizes an induction motor controlled by an inverter, which adjusts the output voltage and frequency based on the operational requirements. The electric rolling stock can adapt to different running conditions while effectively managing overheating issues.
The electric car control system involves a DC power supply connected to a series circuit of a driving DC motor and control choppers. This system maintains constant armature and field currents during operation, ensuring optimal performance as the speed of the electric car increases. The control mechanism is designed to prevent fluctuations in field current, thereby enhancing the reliability of the electric vehicle.
Career Highlights
Kazuyoshi Kotake has built a successful career at Hitachi, Ltd., where he has been instrumental in developing advanced technologies for electric rolling stock. His work has significantly impacted the efficiency and adaptability of electric vehicles in various transit applications.
Collaborations
Throughout his career, Kotake has collaborated with notable colleagues, including Takeshi Kawazoe and Tadashi Takaoka. These partnerships have fostered innovation and contributed to the advancement of electric vehicle technology.
Conclusion
Kazuyoshi Kotake's contributions to electric rolling stock technology demonstrate his commitment to innovation and excellence. His patents reflect a deep understanding of the complexities involved in electric vehicle control systems, positioning him as a key figure in the industry.