Tomohiro Shiraishi

Title: Tomohiro Shiraishi: Innovator in Motor Control Technologies

Introduction

Tomohiro Shiraishi is a notable inventor based in Wako, Japan. He has made significant contributions to the field of motor control technologies, holding 2 patents that showcase his innovative approaches.

Latest Patents

Shiraishi's latest patents include a method for detecting the rotor angle of a DC brushless motor and a controller for the same. The first patent describes a method and apparatus that accurately detect the rotor angle by utilizing a first-order difference of a detected value of a phase current. This method superposes a periodic signal over a drive voltage under current feedback control, ensuring that the total sum of output voltages in three control cycles becomes zero. The phase difference between the actual and estimated rotor angle is calculated, leading to an accurate estimation through follow-up computation.

His second patent focuses on an apparatus and method for controlling the charging and discharging of an energy storage device. This invention holds the charging power upper limit value when the applied charging voltage exceeds a restriction determining voltage. It gradually adjusts the charging power based on the restriction coefficient, ensuring efficient energy management.

Career Highlights

Tomohiro Shiraishi is currently employed at Honda Motor Co., Ltd., where he continues to develop innovative solutions in motor technology. His work has contributed to advancements in energy efficiency and motor performance.

Collaborations

Shiraishi has collaborated with notable colleagues such as Shinobu Ochiai and Kiyoshi Asami, enhancing the innovative environment at Honda Motor Co., Ltd.

Conclusion

Tomohiro Shiraishi's contributions to motor control technologies reflect his dedication to innovation and efficiency. His patents demonstrate a commitment to advancing the field, making him a significant figure in the industry.