Location History:
- Amagasaki, JA (1976)
- Amagaski, JA (1976)
- Amagasaki, JP (1987 - 1992)
Company Filing History:
5 out of 21,351 
1 out of 21 Years Active: 1976-1992
Title: Masayoshi Kumano: Innovator in Inverter Technology
Introduction
Masayoshi Kumano is a notable inventor based in Amagasaki, Japan. He has made significant contributions to the field of inverter technology, holding a total of 5 patents. His work focuses on improving the efficiency and reliability of power systems.
Latest Patents
Kumano's latest patents include a method of controlling an inverter and a power interconnection system. The method of controlling the output voltage of a three-phase three-level inverter utilizes pulse width modulation in both three-pulse and one-pulse modes. This innovation ensures that the upper limit of the percentage modulation is set to a value equal to or smaller than the maximum percentage modulation determined by the minimum switching element off time. This allows for the output of a three-level voltage as an inverter output voltage in each phase.
The interconnection for the electric power system patent describes a power interconnection system between an electric power system and a power converter that generates AC power from a DC source. This system includes a positive feedback loop that incorporates various components such as a frequency deviation detector and an inverter controller. This design aims to create a significant frequency fluctuation after the opening of a branch line switch, ensuring a reliable disconnection process.
Career Highlights
Throughout his career, Kumano has worked with prominent companies, including Mitsubishi Electric Corporation and Shikoku Research Institute Incorporated. His experience in these organizations has contributed to his expertise in inverter technology and power systems.
Collaborations
Kumano has collaborated with notable colleagues such as Takafumi Maruyama and Hiromasa Higasa. Their combined efforts have further advanced the field of inverter technology.
Conclusion
Masayoshi Kumano's innovative work in inverter technology has led to significant advancements in power systems. His contributions continue to influence the industry and pave the way for future innovations.