This inventor holds 34 USPTO granted patents, primarily in Permanent Magnet Motors. Top assignees: Hitachi, Ltd., Hitachi Appliances, Inc, Hitachi Industrial Equipment Systems Co., Ltd.. Active years: 1984-2013.
Location History:
- Ibaraki, JP (1989 - 1994)
- Jyuou, JP (1991 - 1995)
- Juuou, JP (1992 - 1995)
- Juou, JP (2002)
- Taga-gun, JP (2002 - 2005)
- Juo, JP (2002 - 2005)
- Tokyo, JP (2004 - 2008)
- Hitachi, JP (1984 - 2013)
Company Filing History:
27 out of 42,719Â 
6 out of 48Â 
1 out of 498Â 
Years Active: 1984-2013
Areas of Expertise:
Title: Haruo Koharagi: Innovator in Electric Machines and Compressors
Introduction
Haruo Koharagi is a notable inventor located in Hitachi, Japan, known for his significant contributions to electrical engineering and mechanical devices. With an impressive portfolio of 34 patents, Koharagi has been instrumental in developing technologies that enhance energy efficiency and performance in electric machines and compressors.
Latest Patents
Among his recent innovations, one of the standout inventions is the "Permanent Magnet Type Electric Rotating Machine." This patent features a high resistance permanent magnet, which includes a magnetic powder and a fluorine compound, designed to optimize current waveforms. The invention aims to minimize energy loss by adhering to a specific relationship between harmonic components, ensuring a maximum limitation of 20% for the 7th higher-harmonic component.
Koharagi has also developed a "Displacement Type Compressor Having a Self-Start Synchronous Motor and Start Load Reducing Means." This compression device is engineered to reliably start without increasing the compressor's outside diameter while utilizing a self-start synchronous motor. The built-in start load reducing means aids in decreasing the load at startup, enhancing the overall efficiency and functionality of the compressor.
Career Highlights
Throughout his career, Haruo Koharagi has been associated with prominent companies such as Hitachi, Ltd. and Hitachi Appliances, Inc. His work within these organizations has laid the groundwork for advancements in electric and mechanical systems, pushing the boundaries of current technologies.
Collaborations
Koharagi has worked alongside esteemed colleagues, including Satoshi Kikuchi and Kazuo Tahara, contributing to a collaborative environment that fosters innovation and the successful development of cutting-edge technologies.
Conclusion
In conclusion, Haruo Koharagi exemplifies the spirit of innovation through his groundbreaking patents and collaborations. His dedication to enhancing energy efficiency and performance in electric machines and compressors continues to impact the field of engineering significantly. Koharagi's inventive contributions set a strong foundation for future advancements in the industry.