This inventor holds 3 USPTO granted patents. Top assignee: Hitachi, Ltd.. Active years: 1981-1995.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
Years Active: 1981-1995
Title: Innovations of Yorito Jifuku
Introduction
Yorito Jifuku is a notable inventor based in Hitachi, Japan. He has made significant contributions to the field of electrical engineering, particularly in the development of advanced power supply systems. With a total of 3 patents to his name, Jifuku's work has had a considerable impact on the industry.
Latest Patents
Jifuku's latest patents include an inverter apparatus and an uninterruptible power supply utilizing the same technology. This uninterruptible power supply operates multiple inverters in parallel, featuring a current control loop that adjusts the command value for voltage waveform control based on the output current of each inverter. This innovation allows for variable gain in the current control loop, effectively managing cross currents during parallel operation.
Another significant patent is for a large capacity variable speed PWM spatial vector type sub-harmonic driving system. This system is designed for variable-speed driving of AC motors using power converters that employ GTO (gate turn-off) thyristors as switching devices. The system achieves impressive performance metrics, including a torque ripple of 1% or less, a speed response of 60 rad/sec or more, an efficiency of over 95%, and a power factor exceeding 98%.
Career Highlights
Yorito Jifuku is currently employed at Hitachi, Ltd., where he continues to innovate and develop cutting-edge technologies. His work has positioned him as a key figure in the advancement of power supply systems.
Collaborations
Throughout his career, Jifuku has collaborated with esteemed colleagues such as Norikazu Tokunaga and Hidefumi Shirahama. These partnerships have fostered a collaborative environment that enhances innovation and technological development.
Conclusion
Yorito Jifuku's contributions to electrical engineering and power supply systems are noteworthy. His patents reflect a commitment to innovation and excellence in technology. His work continues to influence the industry and inspire future advancements.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile