Rikio Yoshikawa

Title: The Innovations of Rikio Yoshikawa

Introduction

Rikio Yoshikawa is a notable inventor based in Numazu, Japan. He has made significant contributions to the field of electrical engineering, particularly in the development of control systems for permanent magnet motors. With a total of 4 patents to his name, Yoshikawa's work has had a considerable impact on motor technology.

Latest Patents

Yoshikawa's latest patents include a control apparatus for permanent magnet motors. This invention involves superimposing a sinusoidal signal on a current command value of the q-axis, which is supplied from a host. The output voltage of a power converter is then controlled based on this current command value. The calculation of the superimposed signal utilizes ripple component information of induced voltage coefficients of both the d-axis and q-axis of the rotating coordinate system of a permanent magnet motor.

Another significant patent is the torque ripple suppression control device for permanent magnet motors and electric power steering systems. This device includes several components such as a current command conversion unit, a position detector, and a current detection unit. It effectively outputs a current correction command value for the permanent magnet motor, ensuring smoother operation and improved performance.

Career Highlights

Yoshikawa is currently employed at Kokusan Denki Co., Ltd., where he continues to innovate and develop advanced motor control technologies. His expertise in this area has positioned him as a key figure in the industry, contributing to the advancement of electric motor systems.

Collaborations

Throughout his career, Yoshikawa has collaborated with talented individuals such as Katsuhiro Mochizuki and Kazuaki Tobari. These partnerships have fostered a creative environment that has led to the successful development of various technologies.

Conclusion

Rikio Yoshikawa's contributions to the field of electrical engineering, particularly in motor control systems, highlight his innovative spirit and dedication to advancing technology. His patents reflect a deep understanding of complex engineering principles and a commitment to improving motor performance.