This inventor holds 1 USPTO granted patent. Top assignee: Mitsubishi Denki Kabushiki Kaisha. Active years: 1986.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
Years Active: 1986
Title: Hiroyuki Hirakawa and His Alternating Current Limiting Apparatus.
Introduction
Hiroyuki Hirakawa is an inventor associated with Minoo, Japan, and Mitsubishi Denki Kabushiki Kaisha. His listed patent concerns an apparatus designed to limit current between power system lines when a fault occurs.
Latest Patents
Hirakawa’s listed invention is “Alternating Current Limiting Apparatus.” The design normally connects two series circuits in parallel between different power system lines. One circuit uses a reactor and capacitor resonated at line frequency to interconnect the lines. When a fault occurs, a closing device activates a parallel resonance circuit that limits current between them. Resistors in the circuit damp circulating current and help reduce the interruption duty of a circuit breaker. Hirakawa is credited with 1 patent in the provided information.
Career Highlights
The available information associates Hirakawa’s patent work with Mitsubishi Denki Kabushiki Kaisha. His disclosed apparatus addresses fault-current control in interconnected power systems.
Collaborations
Satomi Arimoto and Hiroshi Maekawa are identified as Hirakawa’s coworkers. The provided information does not specify their roles in developing the apparatus.
Conclusion
Hiroyuki Hirakawa’s listed patent presents a circuit-based approach to limiting fault current while damping circulating current and easing circuit-breaker interruption demands.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile