Company Filing History:
7 out of 42,485 
2 out of 1,498 
Years Active: 2003-2013
Title: Naoshi Sugawara: Innovator in Electric Drive Technology
Introduction
Naoshi Sugawara is a prominent inventor based in Hitachi, Japan. He has made significant contributions to the field of electric drive technology, holding a total of seven patents. His work focuses on enhancing the efficiency and functionality of electric vehicles and motor control systems.
Latest Patents
Sugawara's latest patents include an innovative electric drive vehicle that utilizes an induction motor for both braking and driving wheels. This vehicle features a motor controller that manages the induction motor and mechanical brakes. Notably, while the vehicle is stationary and the mechanical brakes are not engaged, the motor controller applies DC or AC voltage within a frequency range of -1 Hz to +1 Hz to the stator of the induction motor. This process generates torque to stop the vehicle and maintain its halted state. Additionally, he has developed an electric motor control system that comprises a generator, an AC motor, a power converter, and an electric motor controller. This system is designed to drive the AC motor using the DC output voltage from the generator, with the controller predicting changes in the DC voltage for optimal performance.
Career Highlights
Throughout his career, Sugawara has worked with notable companies such as Hitachi, Ltd. and Hitachi Construction Machinery Co., Ltd. His experience in these organizations has allowed him to refine his skills and contribute to groundbreaking innovations in electric drive technology.
Collaborations
Sugawara has collaborated with esteemed colleagues, including Keizo Shimada and Akira Kikuchi. These partnerships have fostered a creative environment that has led to the development of advanced technologies in the electric vehicle sector.
Conclusion
Naoshi Sugawara's contributions to electric drive technology and motor control systems have positioned him as a key figure in the field. His innovative patents and collaborative efforts continue to influence the future of electric vehicles.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.