Inventors with similar research interests:
Location History:
- Hitachiota, JP (2008)
- Hitachi, JP (1998 - 2012)
- Mito, JP (2010 - 2015)
- Ibaraki, JP (2016)
- Hitachinaka, JP (2001 - 2021)
Company Filing History:
38 out of 42,485 
12 out of 2,028 
11 out of 248 
Years Active: 1998-2021
Title: Yutaka Matsunobu: Innovator in Rotary Electric Machine Technologies
Introduction
Yutaka Matsunobu, a prominent inventor hailing from Hitachinaka, Japan, has made significant contributions to the field of rotary electric machines. With a total of 57 patents to his name, Matsunobu's work has paved the way for advancements in electric machinery and energy efficiency.
Latest Patents
One of Matsunobu's latest patents is focused on the control device of a rotary electric machine and its corresponding control method. The primary objective of this invention is to reduce torque pulsation. The control device comprises a sinusoidal wave generation circuit that produces a sinusoidal wave signal based on the magnetic pole position of the rotor. It also includes a current command circuit that generates speed and torque commands based on actual speed information and the sinusoidal wave signal. Additionally, a current control circuit regulates an inverter circuit to enable the flow of sinusoidal current to the stator winding, adjusting the current phase periodically when the machine operates under specific torque and rotational frequency conditions. This innovative approach enhances the efficiency and stability of rotary electric machines.
Another notable invention by Matsunobu involves the stator design of the rotating electric machine. This design features multi-phase stator coils with salient pole concentrated windings, a stator iron core with multiple teeth, and connection rings to interlink the stator coils. The arrangement optimizes the winding end position for improved performance.
Career Highlights
Throughout his career, Yutaka Matsunobu has worked with leading companies in the industry, including Hitachi, Ltd. and Hitachi Automotive Systems, Ltd. His invaluable work within these organizations has garnered recognition and acclaim, contributing significantly to the evolution of electric machine technologies.
Collaborations
Matsunobu has collaborated with esteemed colleagues such as Fumio Tajima and Shouichi Kawamata. Together, they have driven innovation and research in the field, reflecting a strong commitment to advancing electric machinery.
Conclusion
Yutaka Matsunobu's extensive patent portfolio and collaborative efforts highlight his dedication to innovation in rotary electric machinery. His contributions continue to influence the industry, making him a key figure in the advancement of electric machine technology.
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