This inventor holds 3 USPTO granted patents and 2 published patent applications. Top assignee: Mitsubishi Denki Kabushiki Kaisha. Active years: 1997-1999.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Location History:
- Shizuoka, JP (1997)
- Tokyo, JP (1997 - 1999)
Company Filing History:
Years Active: 1997-1999
Title: Innovations by Hidekazu Totsuka
Introduction
Hidekazu Totsuka is a notable inventor based in Tokyo, Japan. He has made significant contributions to the field of refrigeration and motor control technology. With a total of 3 patents to his name, Totsuka's work focuses on enhancing the efficiency and performance of refrigeration machines and motor drive units.
Latest Patents
One of Totsuka's latest inventions is a starting control unit for a refrigeration machine. This innovative control unit is designed to operate without consuming excessive energy. It accurately dispenses the right amount of refrigerant from the lubricant in a short time, preventing foaming. The refrigeration machine features an inverter-driven compressor, which includes a current detection circuit that monitors the current supplied to the compressor. The control circuit adjusts the compressor's operation based on the detection results, applying fixed frequency and voltage during start-up.
Another significant patent involves an improved motor drive unit. This unit incorporates a zero-crossing voltage detector circuit that identifies when the AC power supply voltage is at zero-crossing. It utilizes a thyristor for on-off control, managing the energization and de-energization of the motor. The motor's speed is controlled by varying the ratio of energization and de-energization times, optimizing performance and efficiency.
Career Highlights
Totsuka is currently employed at Mitsubishi Denki Kabushiki Kaisha, a leading company in the electrical and electronic equipment industry. His work there has allowed him to develop and refine his innovative ideas, contributing to advancements in technology.
Collaborations
Throughout his career, Totsuka has collaborated with talented individuals such as Kenshi Kawagishi and Kazuyuki Mitsushima. These partnerships have fostered a creative environment that encourages the development of groundbreaking technologies.
Conclusion
Hidekazu Totsuka's contributions to refrigeration and motor control technology exemplify his innovative spirit and dedication to efficiency. His patents reflect a commitment to advancing technology in practical and impactful ways.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile