Company Filing History:
Years Active: 1989-1991
Title: Noriyuki Harao: Innovator in Ultrasonic Motor Technology
Introduction
Noriyuki Harao is a prominent inventor based in Ikoma, Japan. He has made significant contributions to the field of ultrasonic motor technology, holding a total of 3 patents. His work focuses on enhancing the efficiency and functionality of driving apparatuses for ultrasonic motors.
Latest Patents
Harao's latest patents include a driving apparatus for an ultrasonic motor that generates a driving force using a piezoelectric member. This innovative apparatus varies the oscillation frequency to follow a specific driving frequency that corresponds to the mechanical resonance frequency. The design incorporates current and voltage detectors to monitor the mechanical vibration and voltage applied to the piezoelectric member. By detecting the phase difference between the current and voltage, the system maintains a constant phase difference through a variable frequency oscillator, which drives the ultrasonic motor's piezoelectric member.
Another notable patent involves a driving circuit for a piezoelectric ultrasonic motor. This circuit supplies a driving signal from an astable oscillator and is controlled by managing the leakage current through a resistor. The voltage at a specific point is regulated by a temperature-dependent voltage-producing circuit, ensuring optimal performance of the ultrasonic motor.
Career Highlights
Noriyuki Harao is associated with Matsushita Electric Industrial Co., Ltd., a company known for its advancements in electronic technology. His work has significantly impacted the development of ultrasonic motors, making them more efficient and reliable.
Collaborations
Harao has collaborated with notable coworkers, including Kenichiroh Takahashi and Hiromi Tanoue. Their combined expertise has contributed to the innovative advancements in ultrasonic motor technology.
Conclusion
Noriyuki Harao's contributions to ultrasonic motor technology through his patents and collaborations highlight his role as a key innovator in the field. His work continues to influence advancements in this area, showcasing the importance of innovation in engineering.