Location History:
- Kawasaki, JP (1989)
- Kanagawa, JP (1995)
- Tokyo, JP (1997 - 2001)
Company Filing History:
7 out of 4,814 
1 out of 13,411 
Years Active: 1989-2001
Title: Innovations by Koetsu Fujita: A Leader in Power Conversion Technology
Introduction
Koetsu Fujita, an accomplished inventor based in Tokyo, Japan, has significantly contributed to the field of power conversion technology. With a remarkable portfolio consisting of seven patents, Fujita has dedicated his career to developing innovative solutions that enhance electrical systems' efficiency and functionality.
Latest Patents
One of Fujita's most notable recent inventions is a power conversion apparatus that utilizes a zero-phase power supply device. This innovative device features a power converter that employs multiple semiconductor switching elements to perform power conversion, enabling the generation of polyphase alternating current. The design includes an AC load circuit connected to the AC output side of the power converter and a zero-phase power supply device linked to the AC load circuit. The unique configuration allows the voltage and current of the zero-phase power supply device to deliver zero-phase sequence components as viewed from the AC output side of the power converter. Furthermore, the power converter executes time-sharing operations to interchange electric power with the AC load circuit while also managing zero-phase-sequence power with the zero-phase power supply device, showcasing a breakthrough in power conversion methods.
Career Highlights
Fujita's impressive career includes working with prominent organizations such as Fuji Electric Co., Ltd. and Nissan Motor Company Limited. His experience in these companies has played a crucial role in shaping his expertise and ability to innovate in the realm of power electronics.
Collaborations
Throughout his career, Fujita has collaborated with esteemed colleagues, including Shigenori Kinoshita and Takao Yanase. These partnerships have fostered an environment of creativity and mutual support, further driving advancements in their technical field.
Conclusion
Koetsu Fujita stands as a testament to innovation in power conversion technology. His dedication to developing efficient systems and devices continues to have a lasting impact on the industry. As technology advances, Fujita's patents and insights will undoubtedly inspire future inventors and engineers within this vital sector.