This inventor holds 1 USPTO granted patent and 1 published patent application. Top assignee: Hitachi, Ltd.. Active years: 2000.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
Years Active: 2000
Title: Minoru Yoshihara: Innovator in Magnetic Bearing Technology
Introduction
Minoru Yoshihara is a notable inventor based in Ibaraki-ken, Japan. He has made significant contributions to the field of rotating machines, particularly through his innovative patent related to magnetic bearings. His work has implications for improving the efficiency and functionality of various mechanical systems.
Latest Patents
Yoshihara holds a patent for a "Magnetic bearing, rotating machine mounting the same, and method for." This invention involves a rotating machine that employs a sensor-less DC brushless motor. The terminal voltage of the motor is corrected in a phase corrector using a motor phase current signal. The terminal voltage is processed through an integrator and a comparator, converting it into an ON/OFF signal with a duty ratio of 1:1. A rotation signal is produced based on the induced voltage generated by a rotating permanent magnet rotor, eliminating the need for a rotation sensor. The output from the phase corrector is used as a 1-pulse/1-rotation output signal in a PLL circuit, which includes a phase comparator, low-pass filter, oscillator, and counter. This circuit frequency-divides the output signal, and sine wave data are stored in a ROM for each frequency-divided signal position, allowing for controlled unbalance vibrations of the magnetic bearing.
Career Highlights
Minoru Yoshihara is associated with Hitachi, Ltd., a leading company in technology and innovation. His work at Hitachi has allowed him to develop and refine his inventions, contributing to advancements in rotating machinery.
Collaborations
Yoshihara has collaborated with notable colleagues such as Naohiko Takahashi and Tsunehiro Endo. Their teamwork has fostered an environment of innovation and has led to significant developments in their respective fields.
Conclusion
Minoru Yoshihara's contributions to magnetic bearing technology exemplify the impact of innovative thinking in engineering. His patent reflects a commitment to enhancing the efficiency of rotating machines, showcasing the importance of collaboration and creativity in technological advancements.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile