Location History:
- Ibaraki, JA (1978)
- Naka, JP (1988)
- Ibaraki, JP (1987 - 1993)
Company Filing History:
Years Active: 1978-1993
Title: Innovations of Tadashi Takaoka
Introduction
Tadashi Takaoka is a notable inventor based in Ibaraki, Japan. He has made significant contributions to the field of electric rolling stock and induction motor control. With a total of 5 patents to his name, Takaoka's work has advanced the technology used in electric vehicles.
Latest Patents
One of his latest patents is a control apparatus for induction motors and electric rolling stock. This innovative control apparatus allows a single associated train to be utilized across various transit services, including express and accommodation train services. The system employs an induction motor controlled by an inverter, which adjusts the output voltage and frequency based on the operational requirements. For express transit operations, the inverter's output is optimized for long distances, while for accommodation services, a reverse control pattern is implemented to enhance adaptability to running conditions. This invention effectively addresses the overheating issues commonly faced by induction motors.
Another significant patent is the control system for induction motor-driven electric cars. This system converts a DC voltage from the electric car's stringing into a three-phase alternating current using a variable voltage and variable frequency PWM inverter. The inverter is designed to manage multiple three-phase induction motors connected to different wheels, ensuring efficient operation. The control mechanism adjusts the motor current command based on the maximum current values, thereby improving the constant torque characteristics of the electric car.
Career Highlights
Tadashi Takaoka is currently employed at Hitachi, Ltd., where he continues to innovate in the field of electric transportation. His work has been instrumental in enhancing the performance and efficiency of electric vehicles.
Collaborations
Throughout his career, Takaoka has collaborated with esteemed colleagues such as Makoto Nohmi and Yoshio Nozaki. Their combined expertise has contributed to the successful development of advanced technologies in electric rolling stock.
Conclusion
Tadashi Takaoka's contributions to the field of electric transportation through his innovative patents have significantly impacted the industry. His work continues to pave the way for advancements in electric vehicle technology.
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.