Michihiro Nakagawa

Title: Michihiro Nakagawa: Innovator in Power Conversion Technology

Introduction

Michihiro Nakagawa is a prominent inventor based in Kusatsu, Japan. He has made significant contributions to the field of power conversion technology, holding a total of 2 patents. His work focuses on enhancing the efficiency and functionality of power converters, which are essential in various electrical applications.

Latest Patents

One of Nakagawa's latest patents is a Power Converter Controller. This invention features a difference command generator that produces a difference command equivalent to a time integral of three-phase voltage applied to an inductive load within a predetermined cycle in a complex plane. Additionally, a vector command generator creates vector commands that are time integrals of voltage vectors, which compose the difference command. A switching signal generator then generates switching signals to control three pairs of switches in an inverter based on these vector commands. Furthermore, a phase-current computing unit estimates the three-phase current based on the current flowing through DC buses and the vector commands. This innovative approach ensures that at least two of the vector commands maintain a minimum required amount of time to detect the current accurately.

Another notable patent is the Power Conversion Apparatus. This invention includes a carrier generating unit that applies a carrier that monotonically decreases to a switching control unit during specific periods. These periods are defined by the voltage command values, which are strategically set to optimize the performance of the power conversion process.

Career Highlights

Michihiro Nakagawa is currently employed at Daikin Industries, Ltd., a leading company in the HVAC and refrigeration industry. His role involves developing advanced technologies that improve energy efficiency and performance in power conversion systems.

Collaborations

Throughout his career, Nakagawa has collaborated with several talented individuals, including Nobuki Kitano and Naoto Kobayashi. These collaborations have fostered innovation and contributed to the successful development of his patented technologies.

Conclusion

In summary, Michihiro Nakagawa is a distinguished inventor whose work in power conversion technology has led to significant advancements in the field. His innovative patents and contributions to Daikin Industries, Ltd. highlight his commitment to enhancing energy efficiency and performance in electrical applications.