Location History:
- Isesaki, JP (2017 - 2019)
- Hitachinaka, JP (2018 - 2021)
Company Filing History:
Years Active: 2017-2021
Title: The Innovations of Takeshi Umetsu
Introduction
Takeshi Umetsu is a prominent inventor based in Hitachinaka, Japan. He has made significant contributions to the field of electrical engineering, particularly in the development of control devices for AC motors. With a total of 5 patents to his name, Umetsu's work has had a substantial impact on motor control technology.
Latest Patents
Umetsu's latest patents include a control device and control method for AC motors and an AC motor drive system. This innovation enables overmodulation control that boasts high controllability and low noise characteristics. The control device incorporates an inverter for driving an AC motor and a controller that manages the inverter through pulse width modulation. Notably, when over-modulating the inverter, the controller limits the amplitude of the voltage command to a predetermined upper limit value or less.
Another significant patent is the control device of a synchronous electric motor, which features an integrated motor system, pump system, and positioning system. This device includes a synchronous electric motor with three-phase stator windings that are Y-connected. It also has a detection unit that identifies the neutral point potential at the Y connection point. The inverter drives the synchronous electric motor, and the control device operates based on the neutral point potential detected during a measurement mode when the motor is energized by AC current.
Career Highlights
Umetsu is currently employed at Hitachi Automotive Systems, Ltd., where he continues to innovate and develop advanced motor control technologies. His work has been instrumental in enhancing the efficiency and performance of electric motors in various applications.
Collaborations
Some of Umetsu's notable coworkers include Masaki Hano and Naoki Okamoto. Their collaborative efforts contribute to the ongoing advancements in motor control systems.
Conclusion
Takeshi Umetsu's contributions to the field of electrical engineering, particularly in motor control technology, are noteworthy. His innovative patents reflect his commitment to improving the efficiency and functionality of AC motors. Through his work at Hitachi Automotive Systems, Umetsu continues to pave the way for future advancements in this critical area of technology.