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For the Inventor, By the Inventor

Tokyo, Japan

Tetsuji Sakurai

This inventor holds 9 USPTO granted patents. Top assignee: Kabushiki Kaisha Toshiba. Active years: 1990-1997.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tetsuji Sakurai. Retrieved from https://idiyas.com/inventor/tetsuji-sakurai

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 9

% Patents Active = 100.0

Average Co-Inventor Count = 1.8

ph-index = 7

Forward Citations = 99(Granted Patents)


Location History:

  • Oome, JP (1990 - 1992)
  • Tokyo, JP (1993 - 1997)

Company Filing History:

goldMedal9 out of 53,262 
 
Kabushiki Kaisha Toshiba
 patents

Years Active: 1990-1997

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9 patents (USPTO):Explore Patents
1. 5627441 - Apparatus for controlling motor drive and method for controlling thereof (1997-05-06),
2. 5585701 - Current mirror circuit constituted by FET (field effect transistor) and (1996-12-17),
3. 5432414 - Sensorless spindle motor control apparatus (1995-07-11),
4. 5373403 - Method and apparatus for automatic gain control amplifier adjustment for (1994-12-13),
5. 5327052 - Method and apparatus for controlling brushless DC motor (1994-07-05),
6. 5206567 - Apparatus for reliably activating sensorless and brushless DC motor (1993-04-27),
7. 5146374 - Method and apparatus for determining track position of a head on a (1992-09-08),
8. 5051851 - Method and apparatus for positioning head on the basis of premeasured (1991-09-24),
9. 4907107 - Method for positioning a magnetic head in accordance with digital peak (1990-03-06),

Title: Tetsuji Sakurai: Innovator in Motor Drive Control Technology

Introduction

Tetsuji Sakurai is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of motor drive control technology, holding a total of 9 patents. His innovative work focuses on enhancing the efficiency and performance of motor drive systems.

Latest Patents

One of Sakurai's latest patents is an "Apparatus for controlling motor drive and method for controlling thereof." This invention pertains to a motor drive control apparatus designed for applications such as spindle motors in magnetic disk systems. The apparatus achieves high efficiency by eliminating dead loss in power consumption and minimizing switching noises. It includes a motor with a rotor and multiple drive coils, which define the number of excitation phases necessary for the rotor's one-cycle revolution. The current supply means delivers drive currents in a sequential manner to the coils from a voltage source. Additionally, the apparatus features detecting means to monitor the rotor's rotational position and revolution count, allowing for precise control of the motor's operation.

Career Highlights

Sakurai's career is marked by his work at Kabushiki Kaisha Toshiba, where he has been instrumental in developing advanced motor control technologies. His inventions have significantly impacted the efficiency of motor drives, making them more reliable and effective in various applications.

Collaborations

Throughout his career, Tetsuji Sakurai has collaborated with notable colleagues, including Katsuhiko Kaida and Hideo Masaki. These partnerships have fostered innovation and contributed to the advancement of motor drive technologies.

Conclusion

Tetsuji Sakurai's contributions to motor drive control technology exemplify his dedication to innovation and efficiency. His patents reflect a deep understanding of motor systems and a commitment to improving their performance. His work continues to influence the field and inspire future advancements in technology.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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