This inventor holds 2 USPTO granted patents. Top assignee: Hitachi, Ltd.. Active years: 2001-2002.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Location History:
- Tochigi, JP (2001)
- Tochigi-ken, JP (2002)
Company Filing History:
Years Active: 2001-2002
Title: Innovations of Junichi Takagi
Introduction
Junichi Takagi is a notable inventor based in Tochigi-ken, Japan. He has made significant contributions to the field of refrigeration technology, holding 2 patents that showcase his innovative approach to improving efficiency in refrigeration systems.
Latest Patents
One of Takagi's latest patents involves a sophisticated refrigerator design. This refrigerator features a motor that drives a compressor, an inverter for motor operation control, and a converter that responds to AC to supply DC of variable voltage to the inverter. The converter control means manage the output of multiple DC voltages, while the inverter control means utilize pulse width modulation for each voltage. Notably, the lowest voltage among these outputs is designed to deactivate the boosting function of the converter.
Another patent addresses the challenges faced when implementing inverter control in refrigerators. It highlights the issue of compressor motor efficiency dropping due to switching loss in the power element when the DC voltage is boosted at the preset minimum rotating speed. To mitigate this, the patent proposes a control mechanism that turns off the converter control circuit when specific temperature and speed conditions are met, thereby enhancing the overall efficiency of the compressor motor.
Career Highlights
Junichi Takagi is currently employed at Hitachi, Ltd., where he continues to develop innovative solutions in refrigeration technology. His work has significantly impacted the efficiency and functionality of modern refrigeration systems.
Collaborations
Takagi has collaborated with esteemed colleagues such as Makoto Ishii and Noriaki Arakawa, contributing to advancements in their field through teamwork and shared expertise.
Conclusion
Junichi Takagi's contributions to refrigeration technology through his patents reflect his commitment to innovation and efficiency. His work at Hitachi, Ltd. and collaborations with other professionals further enhance the impact of his inventions in the industry.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile