NAITOHｰHaruo

NAITOH Haruo

Title Professor
Department Department of Electrical, Electronic and Computer Engineering
Course Electrical and Electronic Course

Research fields

Haruo Naitoh received the B.E., M.E., and Ph.D. degrees, all in electrical engineering, from the University of Tokyo.
In 1980 he joined TOSHIBA Corporation. On leave from TOSHIBA, he was a Research Fellow at the California Institute of Technology in 1984 and served as a Visiting Assistant Professor at Virginia Polytechnic Institute and State University in 1985.
From 2000, He is a professor at Gifu University.
His research interests are power electronics and motor drive control.
One of his research works is a current control design for switched reluctance motors (SRMs). The electric transfer characteristic of the motors is studied first. Their transfer function is brought out to be represented by a pure resistive component, which is not constant but varies depending on the motor current and speed. The current control design for SRMs follows the classical design technique used for dc machines, where the zero of PI controller cancels the pole of Ls+R. Because the transfer function of SRMs does not have any poles, an integral controller is suitable for them. The integral gain should be adjusted in order to compensate the non-linearity, that is, the variation in the equivalent resistor of the SRMs' transfer function. The values of the integral gain are tuned and tabulated for the motor speed and current. Simulation and experiment demonstrate that the current and speed of the SRMs presents good responses without dependency on the motor speed.

Research Keywords

Switched reluctnace motors, Current control, Speed control

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