Company Filing History:
3 out of 42,508 
2 out of 195 
Years Active: 1988-1990
Title: Innovations of Junichi Shiozaki
Introduction
Junichi Shiozaki is a notable inventor based in Hitachi, Japan. He has made significant contributions to the field of electrical engineering, particularly in the development of generator and motor technologies. With a total of 3 patents to his name, Shiozaki's work reflects a commitment to advancing energy systems.
Latest Patents
One of Shiozaki's latest patents is the AC-excited generator/motor apparatus. This invention comprises an AC-excited generator/motor with an armature mounting, an armature winding connected to an AC power system, and a rotor mounting. It features an exciting winding that is energized by an AC current. The exciting device is designed to supply a controlled AC exciting current to the winding, utilizing a device that calculates the real slip frequency based on the phase difference between the armature voltage and the rotor's rotational phase. This innovation aims to maintain the real slip frequency within a predetermined allowable range.
Another significant patent is the control apparatus for a variable-speed hydraulic power generating system. This system includes a variable-speed AC electric generator connected to an AC electric power system and a hydraulic machine system with a water turbine. The control apparatus features a frequency converter that manages the electric power supplied from the generator to the power system. It also includes control means that respond to external power generation command signals, ensuring efficient operation of the hydraulic machine system while minimizing resonance during speed changes.
Career Highlights
Shiozaki has worked with prominent companies such as Hitachi, Ltd. and Kansai Electric Power Co., Inc. His experience in these organizations has allowed him to develop and refine his innovative ideas in electrical engineering.
Collaborations
Throughout his career, Shiozaki has collaborated with notable colleagues, including Akira Bando and Takao Kuwabara. These partnerships have contributed to the advancement of his projects and innovations.
Conclusion
Junichi Shiozaki's contributions to electrical engineering through his patents and collaborations highlight his role as a significant inventor in the field. His work continues to influence the development of energy systems and technologies.