Location History:
- Hitachi, JP (1996)
- Tokyo, JP (2001)
Company Filing History:
2 out of 42,517 
1 out of 195 
Years Active: 1996-2001
Title: Masataka Harada: Innovator in Pump-Turbine Systems
Introduction
Masataka Harada is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of pump-turbine systems, holding a total of 2 patents. His innovative designs focus on enhancing the safety and efficiency of pump-turbine operations.
Latest Patents
One of Harada's latest patents is the "Reversible Pump-Turbine System." This system features a discharge adjustment device, such as guide vanes, which allows for a safe shutdown of the pump turbine during emergencies. It ensures that even if an abnormality occurs with the guide vanes, the pump turbine can be stopped without causing abnormal water hammer. Additionally, during emergency shutdowns in pump mode, reverse rotation is prevented, allowing for a safe stop while minimizing loads and stresses on the system.
Another notable patent is the "Variable Speed Pumping-Up Generator." This generator includes a first speed control unit that outputs a rotating speed command signal to control the pump turbine based on a power output command. It also features a second speed control unit that manages the amount of AC excitation from the generator's AC excitation unit, ensuring optimal performance during normal operations.
Career Highlights
Throughout his career, Masataka Harada has worked with esteemed 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 pump-turbine technology.
Collaborations
Harada has collaborated with notable colleagues, including Takao Kuwabara and Yasuteru Oono. Their combined expertise has contributed to advancements in the field of energy generation and management.
Conclusion
Masataka Harada's contributions to pump-turbine systems demonstrate his commitment to innovation and safety in energy generation. His patents reflect a deep understanding of engineering principles and a dedication to improving technology for future applications.