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

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3 Author(s)
Yonesoon Fun ; Sch. of Electr. Eng., Seoul Nat. Univ., South Korea ; Jung-Ho Kim ; Dong-il Cho

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

Published in:

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

Date of Conference:

2-6 Dec 1996