Keiji Okushima

Title: Keiji Okushima: Innovator in Motor/Generator Control Technology

Introduction

Keiji Okushima is a notable inventor based in Yokohama, Japan. He has made significant contributions to the field of motor and generator control technology. His innovative work has led to the development of a patented control device that enhances the efficiency of motor/generators.

Latest Patents

Okushima holds a patent for a "Control device for motor/generators." This invention proposes a controller that reduces ripple current generated by an inverter driving both power-generating and vehicle-driving motor/generators. The control device features a first inverter that supplies control current to a first motor/generator, primarily functioning as an electrical motor. Additionally, it includes a second inverter that supplies control current to a second motor/generator, mainly used as a generator. The device employs two PWM signal generating circuits to synchronize the operations of both inverters, ensuring that the currents flow in opposite directions within the DC bus line.

Career Highlights

Keiji Okushima is currently employed at Nissan Motor Company Limited, where he continues to innovate in the automotive sector. His work focuses on improving the performance and efficiency of electric and hybrid vehicles through advanced control systems.

Collaborations

Throughout his career, Okushima has collaborated with esteemed colleagues such as Yasuhiko Kitajima and Shinichiro Kitada. These partnerships have fostered a creative environment that encourages the development of cutting-edge technologies in the automotive industry.

Conclusion

Keiji Okushima's contributions to motor/generator control technology exemplify the spirit of innovation in the automotive field. His patented inventions and collaborative efforts continue to influence the development of more efficient electric vehicles.