Location History:
- Oita, JP (2009 - 2018)
- Kumamoto, JP (2019)
Company Filing History:
4 out of 18 
2 out of 19,805 
1 out of 2 
Years Active: 2009-2019
Title: Kimihiro Nishijima: Innovator in Overvoltage Protection and Power Conversion
Introduction
Kimihiro Nishijima is a notable inventor based in Oita, Japan. He has made significant contributions to the field of electrical engineering, particularly in the areas of overvoltage protection circuits and power converters. With a total of 6 patents to his name, Nishijima's work has had a substantial impact on the industry.
Latest Patents
Nishijima's latest patents include an innovative overvoltage protection circuit designed to safeguard against overvoltage across a wide range of input voltages. This circuit is strategically connected between a rectifier circuit and a load, featuring a semiconductor switch that is controlled by a dedicated control circuit. When the rectified voltage surpasses a predetermined threshold, the control circuit deactivates the semiconductor switch and monitors the voltage potential difference across it. The circuit is engineered to gradually adjust the current flowing through the semiconductor switch, ensuring effective protection.
Another significant patent involves a power converter that utilizes zero-voltage switching control. In this design, the switch-off of the synchronous rectification switch while the auxiliary switch is active leads to resonance between the capacitances of the main switch and the synchronous rectification switch. A parameter obtainer is employed to detect voltage across the selected switch, allowing for precise control of the switching timing based on the obtained parameters.
Career Highlights
Throughout his career, Kimihiro Nishijima has worked with esteemed organizations such as Oita University and Denso Corporation. His experience in these institutions has allowed him to refine his expertise and contribute to groundbreaking innovations in electrical engineering.
Collaborations
Nishijima has collaborated with notable colleagues, including Masaya Takahashi and Nobuhisa Yamaguchi. These partnerships have fostered a collaborative environment that has led to the development of advanced technologies in their respective fields.
Conclusion
Kimihiro Nishijima's contributions to the field of electrical engineering through his patents and collaborations highlight his role as a significant innovator. His work continues to influence advancements in overvoltage protection and power conversion technologies.