Nobuyoshi Muto is a prominent inventor based in Hitachi, Japan. He has made significant contributions to the field of electrical engineering, particularly in the area of pulse width modulation (PWM) technology. With a total of 6 patents to his name, Muto's work has had a substantial impact on the efficiency and control of electrical systems.

Latest Patents

Muto's latest patents include a "Method of controlling the output voltage of a pulse width modulation." This innovation involves controlling a PWM inverter using the fundamental wave voltage of the inverter output as a feedback quantity. The fundamental wave voltage is derived from a function determined by the amplitude ratio of a carrier wave and a modulated wave, along with the d.c. voltage input of the inverter. Another notable patent is the "Method and apparatus for controlling induction motor." This invention outlines a method for operating an induction motor via a PWM inverter, where the slip frequency is calculated to produce a phase compensation signal. This signal, combined with other parameters, helps in controlling the primary current of the induction motor effectively.

Career Highlights

Muto is currently employed at Hitachi, Ltd., a leading company in technology and engineering. His work at Hitachi has allowed him to develop and refine his innovative ideas, contributing to advancements in electrical engineering.

Collaborations

Muto has collaborated with notable colleagues such as Yasuo Matsuda and Keijiro Sakai. These partnerships have fostered a creative environment that has led to the development of groundbreaking technologies in their field.

Conclusion

Nobuyoshi Muto's contributions to pulse width modulation technology and induction motor control demonstrate his expertise and innovative spirit. His patents reflect a commitment to enhancing electrical systems, making him a significant figure in the engineering community.

Profile summary based on public USPTO records.

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