Kazutomo Kakegawa

Title: Kazutomo Kakegawa: Innovator in Ultrasonic Motor Technology

Introduction

Kazutomo Kakegawa is a notable inventor based in Inasa-gun, Japan. He has made significant contributions to the field of ultrasonic motor technology, holding a total of 2 patents. His innovative work focuses on improving the efficiency and performance of ultrasonic motors.

Latest Patents

Kakegawa's latest patents include a "Driving Circuit of Ultrasonic Motor" and a "Drive Control Circuit for Motor." The driving circuit patent describes a system where a microcomputer outputs a driving frequency signal to an oscillator circuit. This oscillator then oscillates at a frequency designated by the microcomputer. A switching control circuit outputs signals to both an A-phase and a B-phase amplifier circuit at predetermined timings. These circuits convert a DC voltage from a voltage control circuit into an AC voltage, which is supplied to two piezoelectric bodies of the ultrasonic motor. This design allows for a gradual increase in voltage levels, reducing vibrations and preventing audible sound during the motor's startup.

The drive control circuit patent outlines a system that includes first and second relays, which selectively connect the motor terminals to a power supply. A control circuit manages the power connecting circuit to disconnect the power supply from the relays and switch the connections. This innovation allows for the switching of the motor's rotational direction or stopping its rotation altogether.

Career Highlights

Kazutomo Kakegawa is currently employed at Asmo Co., Ltd., where he continues to develop and refine technologies related to motors and drive systems. His work has been instrumental in advancing the capabilities of ultrasonic motors, making them more efficient and user-friendly.

Collaborations

Kakegawa has collaborated with notable colleagues such as Satoshi Morizaki and Hiroyuki Furukoshi. Their combined expertise has contributed to the successful development of innovative motor technologies.

Conclusion

Kazutomo Kakegawa's contributions to ultrasonic motor technology exemplify the spirit of innovation. His patents reflect a commitment to enhancing motor performance and efficiency, making a lasting impact in the field.