This inventor holds 10 USPTO granted patents and 1 published patent application and 3 EPO patents. Top assignees: Meidensha Corporation, Nec Corporation. Active years: 2000-2023.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Location History:
- Tokyo, JP (2000 - 2019)
- Numazu, JP (2022 - 2023)
Company Filing History:
Years Active: 2000-2023
Title: Ryuichi Ogawa: Innovator in Power Conversion Systems
Introduction
Ryuichi Ogawa is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of power conversion systems, holding a total of 10 patents. His innovative work focuses on enhancing the efficiency and control of power converters.
Latest Patents
Ogawa's latest patents include a power conversion system and a method for controlling such systems. In this invention, a higher control unit generates a command current based on a command value. A model predictive control unit sets multiple assumed voltage vectors for each switching cycle of the output voltage. It divides the switching cycle into two periods according to the ratio between a dead time and the switching cycle. The system calculates a predicted current for each assumed voltage vector and determines an evaluation function to select the optimal command voltage vector. The power converter is then driven and controlled based on the generated gate signal.
Another notable patent involves a power converter control system using a fixed pulse pattern. This invention determines the minimum number of levels required to output a target modulation ratio. It compares this number with the total voltage orders to be controlled and fixes the larger one as the number of switching times in a quarter cycle. The output voltage shape is determined based on the target modulation ratio, leading to the derivation of a pulse pattern for one cycle.
Career Highlights
Ryuichi Ogawa has worked with notable companies such as NEC Corporation and Meidensha Corporation. His experience in these organizations has contributed to his expertise in power conversion technologies.
Collaborations
Ogawa has collaborated with several professionals in his field, including Masashi Takiguchi and Takayuki Sasaki. These collaborations have further enriched his work and innovations.
Conclusion
Ryuichi Ogawa is a distinguished inventor whose contributions to power conversion systems have made a significant impact in the industry. His innovative patents reflect his commitment to advancing technology in this vital area.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile