Toshikazu Okubo

Title: Innovations by Toshikazu Okubo

Introduction

Toshikazu Okubo is a notable inventor based in Hitachinaka, Japan. He has made significant contributions to the field of electrical engineering, particularly in the development of efficient DC-DC converters. With a total of three patents to his name, Okubo's work showcases his expertise and innovative spirit.

Latest Patents

One of Okubo's latest patents is a small and efficient DC-DC converter. This invention allows for the reduction in size of passive elements such as inductors and capacitors by minimizing switching loss through soft switching technology and increasing the drive frequency of the switching element. The design includes a main switching element, a main diode, and an auxiliary circuit that discharges electric charges from the capacitance between the ends of the main switching element. Additionally, the converter features an auxiliary inductor that is magnetically coupled with the main inductor, along with an auxiliary switching element and diode that manage energy storage and discharge.

Another significant patent is the bi-directional DC-DC converter and its control method. This converter utilizes a transformer for both step-down and step-up operations. It allows for separate switching frequencies for the two operations, which enhances the control range of the duty ratio in PWM control. This innovation compensates for insufficiencies in both step-up and step-down ratios, making it a versatile solution in power management.

Career Highlights

Toshikazu Okubo is currently employed at Hitachi, Ltd., where he continues to develop cutting-edge technologies. His work has been instrumental in advancing the efficiency and functionality of power conversion systems.

Collaborations

Okubo has collaborated with esteemed colleagues such as Hiroyuki Shoji and Tatsumi Yamauchi. Their combined expertise has contributed to the successful development of innovative solutions in the field of electrical engineering.

Conclusion

Toshikazu Okubo's contributions to the field of electrical engineering, particularly through his patents on DC-DC converters, highlight his innovative capabilities and commitment to advancing technology. His work continues to influence the industry and pave the way for future innovations.