Location History:
- Osaka-fu, JP (2003)
- Tottori, JP (2004)
Company Filing History:
Years Active: 2003-2004
Title: Yoshiaki Iwayama: Innovator in Vibration Motor Technology
Introduction
Yoshiaki Iwayama is a notable inventor based in Tottori, Japan. He has made significant contributions to the field of motor technology, particularly in the development of vibration motors. With a total of 2 patents to his name, Iwayama's work has had a considerable impact on the industry.
Latest Patents
Iwayama's latest patents include a vibration motor and an apparatus using the same. This innovative vibration motor is designed to obtain a FAST signal when the motor's revolutions per minute (r.p.m.) exceed a reference speed. The output-driving circuit is then controlled by this FAST signal, allowing for the omission of parts of the powering periods of respective phases. This design enhances the motor's r.p.m. and increases the torque ripple generated, resulting in a greater vibration magnitude. The control system compensates for insufficient vibration that may arise from downsizing the motor. Additionally, a motor driver can be created using a single-chip semiconductor device, which reduces the number of external components, leading to a more compact and lightweight motor.
Another significant patent is the brushless-motor driver operating in PWM mode. In this design, the driver performs synchronous rectification PWM operation, with switching occurring at arbitrary timings between synchronous rectification and one-way PWM operations. This prevents negative current for the power supply, thereby avoiding an increase in power supply voltage due to negative current. This innovation ensures high performance and reliability in motor operation.
Career Highlights
Yoshiaki Iwayama is currently employed at Matsushita Electric Industrial Co., Ltd., where he continues to develop cutting-edge technologies in motor design. His work has been instrumental in advancing the capabilities of vibration motors, making them more efficient and reliable.
Collaborations
Iwayama has collaborated with several talented individuals in his field, including Toshiaki Seima and Tomohiro Inoue. These collaborations have fostered innovation and contributed to the successful development of his patented technologies.
Conclusion
Yoshiaki Iwayama's contributions to vibration motor technology exemplify his dedication to innovation and excellence. His patents reflect a deep understanding of motor dynamics and a commitment to enhancing performance and reliability in motor applications.