Yokogawa Electric Corporation

Hideo Banzai

Yutaka Ono

Yasuhiko Muramatsu

Mitsuhiro Nikaido

Koichi Sato

Yutaka Koizumi

Shigeru Hashida

Haruo Higuchi

Shotaro Shindo

Yoichi Kikukawa

Susumu Ohta

Hiroyuki Shinomiya

Yayoi Tsuchiya

Toshihiro Kanehara

Norihiko Hatano

Syotoro Shindo

A motor drive system used with industrial robots, processing machines, and the like comprising an external interface part ready for connecting a plurality of kinds of host controllers generating a command signal; a sensor interface part to which a motor rotation detecting sensor is connected; a main control part operating for feedback control of a motor according to signals provided by way of the interfaces; and a power amplification part for feeding a current to motor coils according to a control signal from the main control part and wherein the external interface part, the sensor interface part, the main control part, and the power amplification part are separate and modularized as cards. Advantageously, the various controllers, sensors and power systems are changeable to flexibly meet different user requirements.

Motor drive system

A direct drive motor system for controlling driving of the joints of a multi-jointed robot, comprising a motor portion, a rotation detecting portion, a position control portion, a speed control portion, a driving circuit and a tuning portion, wherein the motor portion is of an inductor type, the rotation detection portion uses an optical rotary encoder or magnetic resolver, and the position control portion is arranged to control in a feedback manner the rotational position of the motor with a tertiary servo system with software. The system's driving circuit has a feedback control loop for the current of the motor coil, and a detection circuit for the current includes a small signal isolator. The tuning portion tunes the servo systems of the speed control portion and the position control portion. As a result, the system simultaneously satisfies various requirements of such a direct drive motor.

Direct drive motor system

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Tokyo, Japan

Hideo Banzai