Full digital controller of permanent magnet AC servo motor for industrial robot and CNC machine tool

2002 ◽  
Author(s):  
Dong-Il Kim ◽  
Joon-Hyuk Kang ◽  
Sungkwun Kim
Keyword(s):  
Machine Tool ◽  
Permanent Magnet ◽  
Industrial Robot ◽  
Digital Controller ◽  
Cnc Machine Tool ◽  
Servo Motor ◽  
Cnc Machine ◽  
Ac Servo ◽  
Ac Servo Motor

Fault diagnosis of a machine tool rotary axis based on a motor current test and the ensemble empirical mode decomposition method

2011 ◽  
Vol 225 (5) ◽  
pp. 1121-1129 ◽  
Author(s):  
F Zhao ◽  
X Mei ◽  
T Tao ◽  
G Jiang ◽  
Y Zhou
Keyword(s):  
Machine Tool ◽  
Ensemble Empirical Mode Decomposition ◽  
Cnc Machine Tool ◽  
Current Signal ◽  
Servo Motor ◽  
Cnc Machine ◽  
Rotary Axis ◽  
Mode Decomposition ◽  
Empirical Mode Decomposition Method ◽  
Fault State

Faults frequently occur in the rotary axis of machine tools due to their complicated drive mechanism. The machining accuracy and life time span will decline when there is a fault in the machine tool. Hence, it is necessary to develop a method to detect faults efficiently. In this article, a fault diagnosis method of the rotary axis of a computer numerical control (CNC) machine tool based on servo motor current analysis is proposed. A two-degree-of-freedom dynamic model of worm and worm gear is used in this study to analyse the relationship between the current signal and the fault of the rotary axis of the CNC machine tool. The ensemble empirical mode decomposition method is used as a self-adaptive low-pass filter to extract valuable information from the current signal. A number of experiments are carried out on a CNC machine tool which is in a fault state to validate the presented method. The result shows that the current of the servo motor contains enough information to detect the fault state of the feed axis of the machine tool. After being calculated by the dynamic model, the current signal clearly reveals the fluctuation of stiffness of the teeth which is caused by the fault of the rotary axis.

Research on Servo System for CNC Machine Tool Driven by Permanent Magnet Synchronous Torque Motor

2012 ◽  
Vol 562-564 ◽  
pp. 1505-1508
Author(s):  
Mu Lan Wang ◽  
Kai Yun Xu ◽  
Chuan He ◽  
Lei Zhou
Keyword(s):  
Machine Tool ◽  
Permanent Magnet ◽  
High Performance ◽  
Control Method ◽  
Control Strategies ◽  
Servo System ◽  
Numerical Control ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Control Machine Tool

Permanent Magnet Synchronous Torque Motor (PMSTM) has the main characteristics of low speed, high torque, high precision and excellent stability, which can be applied to implement the direct driving technology for CNC (Computer Numerical Control) machine tool. In this paper, the mathematical model of PMSTM is simply introduced, and the various control strategies are discussed in detail. According to the requirement of high performance for PMSTM driving servo system in CNC machine tool, the corresponding suitable control method is employed in the feed servo system. The proposed scheme is also promoted to apply in the spindle system, the tool holder and the turntable of machine tool.

scholarly journals Design and Analysis of Permanent Magnet AC Servo Motor Based on ANSYS

2021 ◽  
Vol 1754 (1) ◽  
pp. 012151
Author(s):  
Hongdan Lei ◽  
Ying Chen ◽  
Dongdong Chen ◽  
Zongwei Li ◽  
Hongguan Zhu
Keyword(s):  
Permanent Magnet ◽  
Servo Motor ◽  
Ac Servo ◽  
Ac Servo Motor

scholarly journals Optimum Driving Condition of Permanent Magnet AC Servo Motor System

1986 ◽  
Vol 106 (10) ◽  
pp. 927-927
Author(s):  
Yoji Takeda ◽  
Soukichi Uehara ◽  
Takao Hirasa
Keyword(s):  
Permanent Magnet ◽  
Motor System ◽  
Servo Motor ◽  
Ac Servo ◽  
Driving Condition ◽  
Ac Servo Motor
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