Location History:
- Tokyo, JP (2005 - 2006)
- Koganei, JP (2005 - 2006)
Company Filing History:
Years Active: 2005-2006
Title: Yasutaka Sonobe: Innovator in Power System Technology
Introduction
Yasutaka Sonobe is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of power system technology, holding a total of 4 patents. His innovative work focuses on improving the reliability and efficiency of power transmission systems.
Latest Patents
One of Sonobe's latest patents is the **Directional Ground Relay System**. This system is designed to receive electric values related to voltage and current from a power transmission line. It determines the direction of a fault in the line based on these electric values. The relay includes a zero-phase sequential current calculation unit that calculates the zero-phase sequential current from the detected current. Additionally, it features a phase-comparison unit that compares the phase of the zero-phase sequential current to the phase of the voltage in the power transmission line. This allows the system to identify the faulty phase of voltage when the zero-phase sequential current is within a predetermined range.
Another notable patent is the **Digital Directional Relay**. This device converts voltage and current values of a power system into digital data through periodic sampling. It determines the direction of a fault using this digital data. The relay computes variations in unbalanced component voltage and current, using both current and voltage data from reference points in time. By analyzing the phase relationship between these variations, the relay can identify whether a forward or reverse fault occurs.
Career Highlights
Yasutaka Sonobe is currently employed at Kabushiki Kaisha Toshiba, a leading company in the technology sector. His work at Toshiba has allowed him to develop and refine his innovative ideas in power system technology.
Collaborations
Sonobe has collaborated with notable coworkers, including Takahiro Kase and Hidenari Amo. Their teamwork has contributed to the advancement of technology in their field.
Conclusion
Yasutaka Sonobe's contributions to power system technology through his patents demonstrate his commitment to innovation and excellence. His work continues to influence the industry and improve the reliability of power transmission systems.