Yoshihiro Ogashi

Title: Innovations of Yoshihiro Ogashi

Introduction

Yoshihiro Ogashi is a notable inventor based in Funabashi, Japan. He has made significant contributions to the field of electrical engineering, particularly in the development of variable speed drive systems and control systems for induction motors. With a total of 2 patents, his work has had a considerable impact on the efficiency and functionality of motor control technologies.

Latest Patents

One of Yoshihiro Ogashi's latest patents is a variable speed drive system. This system is designed to switch between a driving operation and a regenerative operation of an inverter based on the operation speed. It includes a forced commutation type inverter that controls a wound-rotor type induction motor at variable speeds. The system features an operation mode selection circuit that outputs either a driving operation signal or a regenerative operation signal by comparing an operation speed feedback signal with a predetermined judgement value. Additionally, it has a forced commutation type inverter control circuit that allows the inverter to operate in either mode, along with a connection circuit that supplies output from a converter to the motor. The connection circuit includes several switches to facilitate this operation.

Another significant patent by Ogashi is a control system for a power converter used in driving induction motors. This control system separately manages the exciting current component and the torque current component of the primary current. A voltage detecting device monitors the output voltage of the power converter, while a correcting device adjusts the current components to minimize the difference between the detected voltage and a reference value.

Career Highlights

Yoshihiro Ogashi is currently employed at Kabushiki Kaisha Toshiba, a leading company in the technology sector. His work at Toshiba has allowed him to collaborate with other talented engineers and contribute to innovative projects that advance motor control technologies.

Collaborations

One of his notable coworkers is Masanori Miyazaki. Their collaboration has likely fostered an environment of innovation and creativity, leading to advancements in their respective fields.

Conclusion

Yoshihiro Ogashi's contributions to the field of electrical engineering through his patents and work at Toshiba highlight his role as a significant inventor. His innovations in variable speed drive systems and control systems for induction motors continue to influence the industry.