Location History:
- Shiga, JP (2006)
- Kusatsu, JP (2012)
Company Filing History:
1 out of 27,375 
1 out of 16,453 
Years Active: 2006-2012
Title: Tomonori Ouchiyama: Innovator in Electric Compressor Technology
Introduction
Tomonori Ouchiyama is a notable inventor based in Kusatsu, Japan. He has made significant contributions to the field of electric compressor technology, holding 2 patents that showcase his innovative approach to engineering.
Latest Patents
One of his latest patents is for an electric compressor. This compressor includes a motor driven by a controller, featuring a rotor and a stator. The compressing unit is driven by the motor within a hermetic container filled with refrigerant. The controller practices feedback control at low RPMs, determining the timing of switching elements based on rotor position signals. At high RPMs, it employs open-loop control, outputting a given frequency to synchronize motor operation. This design minimizes noise during PWM driving.
Another significant patent is for a brushless DC motor driving method and apparatus. This invention outputs a rectangular wave or a similar waveform during low-speed operation with a conductive angle between 120° and 150°. At high-speed operation, it outputs a rectangular wave, sine wave, or similar waveform with a conductive angle between 130° and 180°, while maintaining constant PWM duty. This innovation enables high-efficiency, low-noise operation at low speeds, ensures stable high-speed performance, and prevents peak current issues.
Career Highlights
Tomonori Ouchiyama has worked with prominent companies such as Matsushita Electric Industrial Co., Ltd. and Panasonic Corporation. His experience in these organizations has contributed to his expertise in electric compressor technology.
Collaborations
Some of his notable coworkers include Koji Hamaoka and Hidehisa Tanaka. Their collaboration has likely fostered an environment of innovation and creativity in their projects.
Conclusion
Tomonori Ouchiyama's contributions to electric compressor technology through his patents reflect his dedication to innovation and engineering excellence. His work continues to influence the industry and inspire future advancements.