Analysis on Cogging Torque of Permanent Magnet Synchronous Motor for NC Machine Tool Servo-System

2010 ◽  
Vol 44-47 ◽  
pp. 1878-1882
Author(s):  
Shen Bo Yu ◽  
Hui Dong ◽  
Xin Feng ◽  
Jing Yuan
Keyword(s):  
Machine Tool ◽  
Permanent Magnet ◽  
Optimization Design ◽  
Permanent Magnet Synchronous Motor ◽  
Fem Simulation ◽  
Servo System ◽  
Synchronous Motor ◽  
Cogging Torque ◽  
Nc Machine Tool ◽  
Nc Machine

This paper presents a procedure of calculating cogging torque of Permanent Magnet Synchronous Motor (PMSM) for NC machine tool servo-system based on finite element method (FEM). Simulation models of PMSM are established to complete coupled calculation between magnetic fields and mechanical dynamics. Furthermore, the distributions of magnetic flux and electromagnetic force densities are also gained. Finally, the cogging torque of the motor in operating process is suppressed by changing slot opening configuration. The references for the optimization design on NC machine tool servo-system are provided by the simulation model.

Position Servo Control Technology Based on Sliding Mode Variable Structure for Permanent Magnet Linear Synchronous Motor

2014 ◽  
Vol 556-562 ◽  
pp. 2342-2347
Author(s):  
Ji Gui Zheng ◽  
Hong Xing Wu ◽  
Ying Xu ◽  
Ping Zheng
Keyword(s):  
Permanent Magnet ◽  
Optimization Design ◽  
Sliding Mode ◽  
High Reliability ◽  
Complex Structure ◽  
Permanent Magnet Synchronous Motor ◽  
Servo System ◽  
Synchronous Motor ◽  
Main Process ◽  
Servo Motor

The traditional rocket and missile actuator usually uses the hydromantic servo system or pneumatic servo system, because of their better dynamic characteristic and structural adaptability. While with heavy weight, complex structure and expensive cost, it is difficult to realize. The permanent magnet active current servo motor has many advantages, such as high torque, small inertia, high efficiency, the high ratio of power to inertia, cramped construction, firmness, easy maintaining and high reliability. The electrical servo system using the permanent magnet active current servo motor as the power unit satisfies the need of the tactical missile gas vane and air vane servo system, because the range of its transmitted power is wide, its response is quick, and control power is low. This paper analyzed the pole shoe’s shape optimization characteristic against the interior permanent magnet synchronous motor for actuator, presents the design method and main process of permanent magnet synchronous motor for actuator using the field-circuit method. Optimal design can be acquired by the equivalent magnetic circuit method and the finite-element method conveniently and precisely. The analytical result of the prototype motor validated the feasibility of the optimization design.

Analysis and Optimization Design of Self Magnetic-Suspension Permanent Magnet Linear Synchronous Motor

2011 ◽  
Vol 383-390 ◽  
pp. 4762-4767
Author(s):  
Wu Zhang ◽  
Yi Peng Lan ◽  
Feng Ge Zhang
Keyword(s):  
Permanent Magnet ◽  
Optimization Design ◽  
Synchronous Motor ◽  
Magnetic Suspension ◽  
Feed System ◽  
Nc Machine Tool ◽  
Linear Synchronous Motor ◽  
Nc Machine ◽  
Christoffel Transformation ◽  
The Magnetic Field

In order to eliminate the friction force of linear motor nc machine tool feed system and improve the machining precision, a new Self Magnetic-Suspension Permanent Magnet Linear Synchronous Motor(PMLSM)is putted forward in this paper, which can generate the suspending power by itself. In this paper, the magnetic field distribution is calculated by means of equivalent magnetizing current and Schwarz-christoffel transformation, and is further analyzed and verified by using Finite Element Method. Furthermore, the method of optimizating the length of the primary iron-cored is adopted to design the motor. The experimental results shows that self magnetic suspension -PMLSM can generate thrust and suspending force separately, and the thrust and suspending force are improved by applying optimized method.

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