Location History:
- Tokyo, JP (2014 - 2015)
- Yokohama, JP (2017 - 2018)
Company Filing History:
2 out of 52,766 
1 out of 160 
1 out of 615 
Years Active: 2014-2018
Title: Kei Kawasaki: Innovator in Excitation Inrush Current Suppression
Introduction
Kei Kawasaki is a notable inventor based in Tokyo, Japan. He has made significant contributions to the field of electrical engineering, particularly in the area of excitation inrush current suppression. With a total of 4 patents to his name, his work has had a considerable impact on the industry.
Latest Patents
Kawasaki's latest patents include an "Excitation Inrush Current Suppressing Apparatus" and an "Excitation Inrush Current Suppressing Method." The apparatus features bus voltage measurement equipment that measures each phase voltage of the single-phase AC-side bus. It also includes transformer voltage measurement equipment that measures the single-phase-side voltage of the transformer. A phase detector is employed to detect a cutoff phase when opening the circuit breaker by monitoring the phase voltages. This device holds the detected cutoff phase and outputs the same phase as the held cutoff phase. Additionally, a close command output device is designed to close the circuit breaker by the same voltage phase as the cutoff phase output from the phase detector.
The excitation inrush current suppression device is configured to suppress excitation inrush currents flowing through a breaker of the three-phase collective operation type. It measures a three-phase AC voltage of the power supply bus bar to calculate prospective magnetic fluxes of the transformer. The device also measures a three-phase AC voltage on the transformer side to calculate residual magnetic fluxes after shutoff. The breaker is set to close when the polarities of the prospective magnetic fluxes agree with the polarities of the residual magnetic fluxes in all phases.
Career Highlights
Throughout his career, Kei Kawasaki has worked with prominent companies such as Kabushiki Kaisha Toshiba and Promerus, LLC. His experience in these organizations has allowed him to develop and refine his innovative ideas in electrical engineering.
Collaborations
Kawasaki has collaborated with notable professionals in his field, including Venkat R. Dukkipati and Larry Funderburk Rhodes. These collaborations have contributed to the advancement of his projects and patents.
Conclusion
Kei Kawasaki is a distinguished inventor whose work in excitation inrush current suppression has made a significant impact on electrical engineering. His innovative patents and collaborations highlight his expertise and dedication to advancing technology in this field.