Location History:
- Katsuta, JP (1992 - 1994)
- Hitachinaka, JP (1997)
Company Filing History:
3 out of 42,488 
1 out of 73 
1 out of 177 Years Active: 1992-1997
Title: Yoshiaki Matsui: Innovator in Ground Fault Current Limiting Technologies
Introduction
Yoshiaki Matsui, an accomplished inventor based in Katsuta, Japan, has made significant contributions to the field of electrical engineering. With a total of three patents to his name, Matsui's work primarily focuses on technologies that enhance electrical safety and efficiency.
Latest Patents
Matsui's most recent innovations include a groundbreaking patent for a ground fault current limiter and a method of limiting ground fault current. This invention involves a sophisticated arrangement where reactors are connected in series to a neutral point, compensating for ground capacitances of high-speed power switches. By detecting ground faults through the phase difference between zero-phase sequence current and voltage, the system computes optimal compensation quantities, allowing for dynamic control of power switches to mitigate ground faults.
Another notable patent addresses voltage control through a tap transformer. This method calculates the difference between actual and reference voltage and integrates it over time, applying fuzzy logic to determine the best control strategy. The innovative use of fuzzy logic enables the system to adapt to varying reference voltages, thereby optimizing the control of voltage while minimizing unnecessary adjustments of tap positions.
Career Highlights
Matsui's impressive career includes tenures at reputable organizations such as Hitachi, Ltd. and Chubu Electric Power Company, Inc. His expertise in electrical engineering and innovation has propelled advancements in the industry, particularly in the realm of safety and efficiency in power systems.
Collaborations
Throughout his career, Matsui has worked alongside notable professionals such as Tomio Chiba and Mitsuyasu Kido. These collaborations have undoubtedly contributed to the depth and breadth of his innovative work in electrical engineering.
Conclusion
Yoshiaki Matsui stands as a prominent figure in the realm of electrical innovations. His patents not only enhance safety but also streamline the control of electrical systems. With a commitment to advancing technology, Matsui's contributions will likely continue to influence the industry for years to come.