Mamoru Shiraki

Title: Mamoru Shiraki: Innovator in AC Rotary Machine Technology

Introduction

Mamoru Shiraki is a distinguished inventor based in Kobe, Japan. He has made significant contributions to the field of electrical engineering, particularly in the development of controllers for AC rotary machines. With a total of four patents to his name, Shiraki's work has had a notable impact on the industry.

Latest Patents

One of his latest patents is a controller for AC rotary machines. This innovative controller is designed to detect the current of the normal phase accurately when a short circuit failure occurs in one phase. It achieves this by connecting a current sensor in series with the positive or negative electrode side switching device of an inverter. When a short circuit failure is detected, the controller calculates voltage command values for the normal phases and adjusts them to ensure that the detection timing is sufficient for accurate current detection.

Another significant patent is related to an electric power steering control apparatus and steering control method. This invention utilizes a CPU to calculate control amounts for a motor that assists the steering force of a vehicle's steering wheel. The design includes a filter section that processes the motor's rotation speed, which helps to reduce vibrations and noise during operation, particularly in high-torque and high-motor-rotation speed scenarios.

Career Highlights

Mamoru Shiraki is currently employed at Mitsubishi Electric Corporation, where he continues to innovate and develop advanced technologies. His work has been instrumental in enhancing the performance and reliability of electric power steering systems and AC rotary machines.

Collaborations

Shiraki has collaborated with notable colleagues, including Tatsuya Mori and Katsuya Ikemoto. Their combined expertise has contributed to the successful development of various technologies within the company.

Conclusion

Mamoru Shiraki's contributions to electrical engineering, particularly in the realm of AC rotary machines and electric power steering systems, highlight his innovative spirit and technical expertise. His patents reflect a commitment to advancing technology and improving the functionality of essential systems in modern vehicles.