Hiroaki Ohya

Title: Inventor Hiroaki Ohya: Innovations in Electrical Engineering

Introduction

Hiroaki Ohya is a renowned inventor based in Kitakyushu, Japan, known for his significant contributions to the field of electrical engineering. With a total of two patents to his name, his work focuses on enhancing the functionality and efficiency of electrical machines and control systems.

Latest Patents

Hiroaki Ohya's latest patents include two groundbreaking inventions that address important technological challenges. The first patent is a "Rotating Electrical Machine Control Apparatus," which features a position information generator and a controller designed to enhance the reliability of position information in rotating electrical machines. This invention enables the controller to issue a reset request, allowing the position information generator to store and update position data effectively, thereby determining the abnormality of position information before and after a reset.

The second patent is an "Elevator Control Device with Carrier Frequency Switch Circuit." This device integrates a vector controller that calculates the required voltage command for driving an elevator cage, along with a carrier frequency switch circuit for outputting carrier frequency signals. The innovation of changing the carrier frequency signal when a torque command reaches the torque limit allows for the continuous operation of elevators, protecting the switching element of the power converter from potential damage.

Career Highlights

Hiroaki Ohya is currently associated with Yaskawa Electric Corporation, where he applies his expertise in electrical machines and control systems. His work has significantly impacted the efficiency of elevator systems and other electrical machinery used in various industries.

Collaborations

During his career, Hiroaki Ohya has collaborated with notable peers, including Masashiro Tanaka and Yoichi Yamamoto. Together, they have contributed to advancements in electrical engineering, focusing on innovations that meet modern technological requirements and industry standards.

Conclusion

Hiroaki Ohya's contributions to the field of electrical engineering demonstrate the crucial role of innovation in developing efficient control systems. His patents reflect a commitment to improving the performance and reliability of electrical machines, solidifying his reputation as a notable inventor in today’s technology landscape.