Location History:
- Hitachi, JP (2003 - 2014)
- Tokyo, JP (2004 - 2016)
Company Filing History:
7 out of 42,508 
3 out of 2,028 
2 out of 495 
Years Active: 2003-2016
Title: Ryoichi Takahata: Innovator in Electric Motor Technology
Introduction
Ryoichi Takahata is a prominent inventor based in Hitachi, Japan. He has made significant contributions to the field of electric motor technology, holding a total of 12 patents. His work focuses on enhancing the efficiency and functionality of electric motor drive systems.
Latest Patents
One of Takahata's latest patents is an electric motor drive device. This device includes an inverter that drives a motor, a voltage division circuit that detects the neutral point potential of the motor's stator winding, and a controller that estimates the rotor position based on the detected neutral point potential. The controller also controls the inverter based on the estimation results. Another notable patent is for a drive system for synchronous electrical motors. This system comprises a synchronous electrical motor, a power converter with multiple switching elements, and a controller that outputs voltage instructions to the power converter. It also features a voltage detection unit for open phases, which calculates induced voltage differences during operation.
Career Highlights
Takahata has worked with notable companies such as Hitachi, Ltd. and Hitachi Automotive Systems, Ltd. His experience in these organizations has allowed him to develop innovative solutions in electric motor technology.
Collaborations
Throughout his career, Takahata has collaborated with esteemed colleagues, including Satoshi Kikuchi and Shinichi Wakui. These partnerships have contributed to the advancement of his projects and patents.
Conclusion
Ryoichi Takahata's contributions to electric motor technology through his patents and collaborations highlight his role as a key innovator in the field. His work continues to influence advancements in motor drive systems and efficiency.