Variable structure control of AC servomotors for performance improvement in CNC applications

Author

Yonesoon Fun ; Kim, Jung-Ho ; Cho, Dong-il Dan

Author_Institution

Sch. of Electr. Eng., Seoul Nat. Univ., South Korea

fYear

1996

fDate

2-6 Dec 1996

Firstpage

579

Lastpage

583

Abstract

A variable structure controller is developed for AC servomotors used in computer-numerical-controlled (CNC) milling machines. The controller designed is implemented as an outer loop controller to a factory designed motor servo-pack system. The variable structure controller is designed for a fast response when the speed tracking error is large, and for small oscillations when the speed tracking error is small. The controller designed is installed on a CNC milling machine using a PC, and milling experiments were performed. The results show improved performance over the factory-designed controller

Keywords

AC motors; angular velocity control; closed loop systems; machine tools; machining; servomotors; tracking; variable structure systems; AC servomotors; CNC milling machines; closed loop system; computerised numerical control; outer loop controller; sliding mode; speed control; speed tracking error; variable structure control; AC motors; Automatic control; Computer numerical control; Control systems; DC motors; Electric variables control; Proportional control; Servomechanisms; Servomotors; Synchronous motors;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Technology, 1996. (ICIT '96), Proceedings of The IEEE International Conference on

Conference_Location

Shanghai

Print_ISBN

0-7803-3104-4

Type

conf

DOI

10.1109/ICIT.1996.601657

Filename

601657