Company Filing History:
3 out of 42,496 
1 out of 1 Years Active: 1988-1990
Title: The Innovations of Masao Ohi
Introduction
Masao Ohi is a distinguished inventor based in Mito, Japan, known for his contributions to the field of rotor technology. With a total of three patents to his name, Ohi has significantly advanced methods for optimizing rotor performance, particularly in electric machines.
Latest Patents
One of Ohi's latest inventions is the "Method of Adjusting Thermal Balance of Rotor." This innovative method addresses the challenge of maintaining thermal equilibrium in rotors by analyzing shaft-vibration components under various conditions. By detecting differences in shaft-vibration components between actual load and no-load conditions, and converting these into temperature conditions for actual loads, Ohi facilitates a finer adjustment to rotor cooling systems. The fundamental goal of his method is to enhance performance by ensuring that temperature variations do not adversely impact rotor functionality.
Another significant patent is his "Fault Diagnosis System for Rotor Winding of Rotary Electric Machine." In this system, the rotor winding is energized in a direct current mode with an alternating current voltage superimposed. This approach enables real-time monitoring of impedance, which can be compared to a reference value, allowing for precise fault detection while the machine is operational. His contributions in this area have paved the way for more reliable and efficient rotary electric machines.
Career Highlights
Throughout his career, Masao Ohi has made notable impacts while working with prestigious companies such as Hitachi, Ltd. and Hitachi Service Engineering Co., Ltd. His dedication to innovation and excellence in engineering has solidified his reputation as a leading expert in rotor dynamics and electric machine technology.
Collaborations
Masao Ohi's work has often been enhanced through collaboration with other skilled professionals, including Ryoichi Shiobara and Takashi Watanabe. These partnerships highlight the collaborative nature of technological advancements, where pooling expertise can lead to groundbreaking inventions.
Conclusion
Masao Ohi's innovative patents and contributions continue to influence the design and functionality of electric machines. His work not only enhances the efficiency and reliability of these systems but also reflects the spirit of innovation in the field of engineering. As technology progresses, Ohi's inventions will likely play a crucial role in shaping future advancements in rotor technology.