Company Filing History:
3 out of 173 
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Years Active: 2000-2009
Title: Innovations of Yoshifumi Minowa
Introduction
Yoshifumi Minowa is a notable inventor based in Kyoto, Japan. He has made significant contributions to the field of electrical engineering, particularly in inverter technology. With a total of 4 patents to his name, Minowa's work has had a considerable impact on the industry.
Latest Patents
One of his latest patents is an inverter apparatus comprising switching elements. This invention addresses the problem of eliminating variation in potential during the turn-off time period of each Gate Turn-Off (GTO) element. It stabilizes the gate drawing current by ensuring the proper turn-off of the GTO element. The inverter apparatus features a three-phase inverter that includes paired GTO elements. The inverter control portion has a simultaneous switching prevention function, which delays the turn-on operation of GTO elements corresponding to phases other than the one being activated.
Another significant patent is the isolated operation prevention device for distributed power supply and interharmonic detection method. This invention includes a power fluctuation monitoring unit that detects power fluctuations at a receiving point. It utilizes measurement results of voltage and current to form a compensation power injection signal that cancels out power fluctuations. The inverter device is then driven and controlled by this signal, injecting both intermediate-order harmonic current and compensation power into the injection point.
Career Highlights
Yoshifumi Minowa has worked with prominent companies such as Nissin Electric Co., Ltd. and Chubu Electric Power Co., Ltd. His experience in these organizations has allowed him to develop and refine his innovative ideas in electrical engineering.
Collaborations
Minowa has collaborated with notable coworkers, including Shoji Nishimura and Isao Koda. Their combined expertise has contributed to the advancement of technology in their respective fields.
Conclusion
Yoshifumi Minowa's contributions to inverter technology and electrical engineering are noteworthy. His innovative patents reflect his dedication to solving complex problems in the industry. Through his work, he continues to influence the future of electrical engineering.