Title :
Research on Speed Stability of Permanent Magnet Synchronous Servo System
Author :
Xu, Dong ; Wang, Tianmiao ; Liu, Jingmeng ; Wei, Hongxing
Author_Institution :
Beijing Univ. of Aeronaut. & Astronaut., Beijing
Abstract :
The paper concerns with the speed stability of permanent magnet synchronous servo system. Used in numerical control machines, the servo system is required to output steady rotor speed. Based on vector control theory, a servo system is designed with PID module as the regulators of the speed and current loops. The effect of important factors including speed regulator, current regulator, the speed and current feedback are analyzed. Then the methods to enhance the rotor speed stability are discussed, including optimizing the regulators and filtering the current signals. The feedback speed gotten from positional sensor whose precision is decided by the sensor adapts to this servo system. The result of both simulation and screw thread process experiments on NC lathe validated their effectiveness.
Keywords :
angular velocity control; electric current control; machine control; permanent magnet motors; stability; synchronous motors; three-term control; PID module; current loops regulators; permanent magnet synchronous servo system; speed regulators; speed stability; vector control theory; Computer numerical control; Feedback; Machine vector control; Optimization methods; Permanent magnets; Regulators; Sensor systems; Servomechanisms; Stability; Three-term control;
Conference_Titel :
Industrial Electronics and Applications, 2007. ICIEA 2007. 2nd IEEE Conference on
Conference_Location :
Harbin
Print_ISBN :
978-1-4244-0737-8
Electronic_ISBN :
978-1-4244-0737-8
DOI :
10.1109/ICIEA.2007.4318529
