Location History:
- Tokyo, JP (2002 - 2005)
- Tottori, JP (2002 - 2009)
Company Filing History:
1 out of 26 
1 out of 33 
11 out of 832,891 Years Active: 2002-2009
Title: Youichi Yamamoto: Innovator in Inverter Technologies
Introduction
Youichi Yamamoto, an accomplished inventor based in Tokyo, Japan, has made significant contributions to the field of electrical engineering. With a total of 12 patents to his name, Yamamoto has focused his innovations on developing advanced inverter circuits associated with discharge lamps. His work reflects a deep understanding of the interplay between technology and practical applications.
Latest Patents
Among his latest patents, Yamamoto's groundbreaking design for an inverter circuit for discharge lamps used in multi-lamp lighting systems stands out. This innovative circuit effectively controls the value of the negative resistance characteristic of fluorescent lamps. By eliminating excessively set reactance, it utilizes a shunt transformer that possesses a reactance exceeding the negative resistance characteristic. This design incorporates two coils connected to the secondary winding of a step-up transformer, magnetically coupling to form a shunt transformer. As a result, the magnetic fluxes generated cancel each other out, allowing for balanced current flow through the connected discharge lamps. This clever balancing operation ensures that the reactors exceed the negative resistance of the discharge lamps, thus effectively lighting them.
Career Highlights
Throughout his career, Yamamoto has held crucial roles that furthered his expertise in inverter technology. He has worked for notable companies, including Canon Sales Co., Inc., where he honed his skills and contributed to various projects. His experience in such dynamic environments has allowed him to remain at the forefront of innovation in electrical devices.
Collaborations
Yamamoto has collaborated with several esteemed professionals, enhancing the creative process of his inventions. Notably, he has worked alongside Kazuo Maeda and Yoshimi Shioya, both of whom have played vital roles in the development of his innovative solutions. These collaborations exemplify the importance of teamwork in advancing technological frontiers.
Conclusion
In summary, Youichi Yamamoto embodies the spirit of innovation within the realm of inverter technologies. His dedication to advancing the functionality of discharge lamps through intelligent circuit design has left a significant mark on the industry. As his career progresses, it will be exciting to see how his future inventions continue to shape electrical engineering and lighting technologies.