Fanuc Corporation

Hitachi, Ltd.

Fujitsu Fanuc Limited

Yo Ikebe

Hidetsugu Komiya

Hideaki Oku

Shigeki Kawada

Yoshinori Kohzai

Yoichi Amemiya

Hiromu Hirai

Takeshi Nakamura

Jun Ikebe

Method for drivingly controlling a variable reluctance type motor

Deflection-insensitive optical rotary encoder

An electric servo system has an electrical drive and a controllable object driven by the electrical drive whereby an error between an actual amount of actuation of the controllable object and a target value toward which the object is controlled is applied to the electrical drive to control the same so that the amount of actuation of the controllable object coincides with the target value. A compensator is provided on the input side of the electrical drive, for compensating the load characteristics of the controllable object such that the output of the electrical drive does not have apparent dependency on torque of the load.

Electric servo system

A positioning control system which has a servo system provided with a position feedback system for detected positional information and a velocity feedback system for detected velocity information of a motor and in which the motor is driven by the servo system in accordance with commanded positional information to position a movable machine part of a numerical-controlled machine. The disparity between the detected velocity of the movable machine part and the detected motor velocity is fed back to the control input side of the motor, thereby suppressing vibration of the movable machine part at the moment of completion of the positioning operation.

Positioning control system

Growing community of inventors

Yamanashi, Japan

Yo Ikebe