Location History:
- Tochigi, JP (1993)
- Kanagawa-ken, JP (2006)
- Yokohama, JP (2006 - 2009)
- Itami, JP (2006 - 2011)
- Hyogo, JP (2011)
- Kanagawa, JP (2006 - 2012)
- Tokyo, JP (1992 - 2024)
Company Filing History:
20 out of 28,566 
7 out of 7,525 
2 out of 3,781 
Years Active: 1992-2025
Title: Satoshi Narumi: Innovator in Semiconductor and Motor Control Technologies
Introduction
Satoshi Narumi, based in Kanagawa, Japan, is a renowned inventor with a remarkable portfolio of 29 patents. His innovations have significantly impacted the fields of semiconductor devices and motor control systems, showcasing his expertise and dedication to advancing technology.
Latest Patents
Narumi's most recent patents include groundbreaking technologies in motor control. One notable patent involves a semiconductor device and motor drive system that allow for a stable start-up of three-phase motors. This innovation accurately detects the rotor's position while at rest and applies drive current to two phases based on that position, enhancing motor performance. Another pivotal patent focuses on detecting back electromotive force in non-conducting phases at extremely low duty ratios. This system includes a three-phase motor, an inverter circuit, and a semiconductor device that estimates the rotor's position and generates a pulse width modulation signal, leading to improved efficiency in motor operations.
Career Highlights
Satoshi Narumi has contributed to significant advancements in technology through his work with respected companies such as Ricoh Company, Ltd. and Renesas Electronics Corporation. His roles in these organizations have allowed him to develop and implement innovative solutions that enhance motor and semiconductor technologies.
Collaborations
Throughout his career, Narumi has collaborated with esteemed colleagues, including Kiyonori Tsuda and Hiroshi Hosokawa. These partnerships have fostered a creative environment that has led to the successful development of numerous technologies in his field.
Conclusion
Satoshi Narumi is a noteworthy inventor whose contributions to the semiconductor and motor control industries are underscored by his impressive collection of patents. His work continues to influence the evolution of technology, paving the way for future innovations and advancements in motor systems.