Nobuo Ohtsuka

Title: Nobuo Ohtsuka: Innovator in Inverter Technology

Introduction

Nobuo Ohtsuka is a notable inventor based in Gunma, Japan. He has made significant contributions to the field of inverter technology, particularly through his innovative designs and applications. His work has been recognized for its impact on electrical engineering and power conversion systems.

Latest Patents

Ohtsuka holds a patent for an inverter apparatus. This invention comprises a bridge circuit made up of a combination of multiple switching transistors, along with a microprocessor that controls the operation of these transistors. The apparatus utilizes pulse width modulation (PWM) theory to store patterns of ON and OFF states in a first ROM of the microprocessor. The transition patterns for electrical angles ranging from 0 degrees to 30 degrees are stored in a second ROM, while the timing data for each period is kept in a third ROM. The microprocessor manages the holding time data and outputs the ON/OFF pattern, effectively controlling the switching transistors. This cycle allows for the generation of an AC output through the PWM system.

Career Highlights

Ohtsuka has been associated with Sanyo Electric Co., Ltd., where he has contributed to various projects and innovations in electrical engineering. His expertise in inverter technology has positioned him as a key figure in the development of efficient power conversion systems.

Collaborations

Throughout his career, Ohtsuka has collaborated with notable colleagues, including Kiyoshi Itani and Hisashi Tokizaki. These collaborations have further enhanced the innovation and effectiveness of the projects they have worked on together.

Conclusion

Nobuo Ohtsuka's contributions to inverter technology exemplify his dedication to innovation in electrical engineering. His patent for the inverter apparatus showcases his ability to integrate complex systems for improved performance. Ohtsuka's work continues to influence the field and inspire future advancements.