Location History:
- Ibaraki, JP (1990)
- Ibaragi, JP (1992)
- Katsuta, JP (1992 - 1993)
- Yokohama, JP (2011)
- Isesaki, JP (2016 - 2020)
- Hitachinaka, JP (1998 - 2021)
Company Filing History:
21 out of 2,028 
9 out of 42,496 
1 out of 66 
Years Active: 1990-2021
Title: The Innovative Contributions of Tomishige Yatsugi
Introduction
Tomishige Yatsugi, an accomplished inventor based in Isesaki, Japan, has made significant strides in the field of electrical engineering. With a total of 31 patents to his name, Yatsugi's work has primarily focused on inverter technology, motor drives, and electric power steering systems, showcasing his dedication to enhancing modern electrical applications.
Latest Patents
Yatsugi's recent innovations include several groundbreaking patents that reflect his expertise. The first is an inverter control device, which comprises at least first and second inverters. This device includes a current detector to sense the current flowing through the main circuit of the first inverter, a current controller that generates voltage command values based on detected and commanded currents, and a voltage command predictor that anticipates the voltage command value for the second inverter based on variations in the first.
Another notable patent is for a motor driving device and method to measure phase current in such devices. This invention addresses the measurement of three-phase currents of a brushless motor using a current sensor to monitor the DC bus current in the inverter. The control unit shifts the pulse phase of PWM pulses within two cyclic instances to accurately measure and correct offset errors in the current sensor.
Career Highlights
Throughout his career, Tomishige Yatsugi has collaborated with prominent companies, notably Hitachi Automotive Systems and Hitachi, Ltd. His contributions to these organizations have been instrumental in developing advanced electrical technologies that meet the demands of today’s automotive and industrial sectors.
Collaborations
During his tenure, Yatsugi has had the privilege to work alongside renowned colleagues, including Tomonobu Koseki and Fumiya Iijima. These collaborations have fostered an environment of innovation and learning, contributing to the successful development of pioneering technologies in the field.
Conclusion
Tomishige Yatsugi's impressive portfolio of patents and collaborative efforts within influential companies underscore his role as a key innovator in electrical engineering. His inventions in inverter control and motor technology are paving the way for future advancements, making a lasting impact on the industry.