Thermal Structure Analysis and Optimization of the Feeding System of the Permanent Magnet Linear Synchronous Motor

2014 ◽  
Vol 492 ◽  
pp. 128-134
Author(s):  
Jun Hai Jiang ◽  
Guo Yun Ye ◽  
Yue Tong Xu
Keyword(s):  
Permanent Magnet ◽  
High Speed ◽  
Thermal Structure ◽  
Response Speed ◽  
Element Model ◽  
Synchronous Motor ◽  
Cnc Machine Tools ◽  
Cnc Machine ◽  
Linear Synchronous Motor ◽  
Temperature Field Model

Because of its high dynamic response speed and acceleration, high rigidity and positioning accuracy, the permanent magnet linear synchronous motor (PMLSM) is able to meet the requirements of high-speed precision CNC machine tools. However, its thermal problems have seriously hampered its development. This paper establishes a PMLSM temperature field model, designs a cooling structure, determines the boundary conditions of the finite element model and conducts computer simulation of the model. The result shows that the designed cooling structure can effectively alleviate the motors thermal problems.

Design and Electromagnetic Analysis of a Double-Sided Permanent Magnet Linear Synchronous Motor

2013 ◽  
Vol 416-417 ◽  
pp. 270-275
Author(s):  
Xin Min Zhang ◽  
Chuan Ying Cheng ◽  
Qin Fen Lu ◽  
Yun Yue Ye ◽  
Xiao Sheng Tao
Keyword(s):  
Permanent Magnet ◽  
High Speed ◽  
Normal Force ◽  
Thrust Force ◽  
Cooling System ◽  
Element Model ◽  
Basic Structure ◽  
Synchronous Motor ◽  
Force Density ◽  
Linear Synchronous Motor

The permanent magnet linear synchronous motor (PMLSM) has a good application prospect due to many significant advantages such as high speed, high precision, high thrust force density, simple structure, energy saving and reliable operation etc., so the research and development are of great importance. This paper mainly focuses on the key design points of a double-sided water-cooled PMLSM. According to the required thrust force, the design is given out including the basic structure parameters, winding connection methods and water cooling system. Based on the erected finite-element model, the performances such as back-EMF, thrust force, normal force, power factor and efficiency are predicted. By comparing with a single-sided PMLSM with the same specifications, it is proved that this double-sided PMLSM has lower thrust force ripple and higher thrust force density. Moreover, the net normal force of its mover is almost zero. Finally, the predicted back-EMF is verified by measurement.

Skew and End-Teeth Optimization in Reduce Permanent-Magnet Linear Synchronous Motor Normal Force Fluctuation

2011 ◽  
Vol 383-390 ◽  
pp. 4853-4859 ◽  
Author(s):  
Jia Kuan Xia ◽  
Wei Yang Li ◽  
Li Shen
Keyword(s):  
Permanent Magnet ◽  
System Analysis ◽  
Normal Force ◽  
Synchronous Motor ◽  
Cnc Machine Tools ◽  
Feeding System ◽  
Cnc Machine ◽  
Force Fluctuation ◽  
Detent Force ◽  
Linear Synchronous Motor

Permanent-magnet linear synchronous motor (PMLS-M) exist the problem of normal force fluctuation, especially in the servo feeding system of high-precision CNC machine tools, the normal force fluctuation can cause the feeding table in vibration and produce resonance with other moving components of the servo feeding system .Analysis shows that detent force fluctuation is the predominant factor. Adopt the methods of end-teeth optimization combine with skew or V-skew can effectively reduce the detent force fluctuation. By using the Fourier regression analysis and limited enumeration method to calculate the optimal parameters, and applying the layered finite element analysis for simulation. The results of simulation prove that with the precondition of the thrust force loss slightly, adopt those optimization methods can reduce the normal force fluctuation significantly.

Optimal Design of a Double-Sided Permanent Magnet Linear Synchronous Motor for Ropeless Elevator System

2013 ◽  
Vol 416-417 ◽  
pp. 99-103
Author(s):  
Li Ren Huang ◽  
Ji Wei Dong ◽  
Qin Fen Lu ◽  
Yun Yue Ye ◽  
Yi Chen
Keyword(s):  
Permanent Magnet ◽  
Low Cost ◽  
Element Model ◽  
Synchronous Motor ◽  
Underground Mines ◽  
Force Density ◽  
Iron Core ◽  
Linear Synchronous Motor ◽  
Deep Underground ◽  
Force Ripple

The ropeless elevator driven by linear motor is expected to be a new solution to vertical transportation of skyscrapers and the deep underground mines. Due to high thrust force density, low force ripple and low cost etc., a double-sided permanent magnet linear synchronous motor (DPMLSM) with slotted iron core and multi-segment primary is proposed and designed. Based on the erected 2D finite element model, the structure is optimized in order to reduce the detent force. Moreover, the influence of manufacture error on force performance is also investigated. It is shown the proposed DPMLSM is suitable for the ropeless elevator.

Detection and Analysis of Stator Winding Inter-Turn Short Circuit Fault in Permanent Magnet Linear Synchronous Motor

2012 ◽  
Vol 529 ◽  
pp. 322-326
Author(s):  
Cai Xia Gao ◽  
Chen Hao ◽  
Yue Bing Zhao
Keyword(s):  
Finite Element ◽  
Permanent Magnet ◽  
Short Circuit ◽  
Element Model ◽  
Synchronous Motor ◽  
Stator Winding ◽  
Element Analysis ◽  
Harmonic Content ◽  
Linear Synchronous Motor ◽  
Short Circuit Fault

A two-dimensional finite element model of PMLSM is build based on the finite element analysis software Magnet to research the diagnosis of stator winding inter-turn short circuit fault in PMLSM. The velocity, thrust, the stator current performance curve are obtained by simulation using Magnet when PMLSM is normal and under different extent inter-turn short circuit fault, the harmonic content of speed and thrust are analyzed using Matlab / Simulink , the conclusion that the thrust of the harmonic content is used as the Permanent Magnet Linear Synchronous Motor (PMLSM) stator inter-turn short circuit fault feature is proposed , which provided a basis for detection of stator winding inter-turn short circuit fault in PMLSM.

scholarly journals A Review on Disturbance Analysis and Suppression for Permanent Magnet Linear Synchronous Motor

Actuators ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 77
Author(s):  
Xuezhen Wang ◽  
Feixue Chen ◽  
RenFeng Zhu ◽  
Xiaolu Huang ◽  
Na Sang ◽  
...  
Keyword(s):  
Permanent Magnet ◽  
Thermal Effects ◽  
High Speed ◽  
Synchronous Motor ◽  
Ball Screw ◽  
Mitigation Measures ◽  
Feed System ◽  
Residual Vibration ◽  
Linear Synchronous Motor ◽  
Disturbance Analysis

In high-end testing and manufacturing equipment, a trend exists whereby the traditional servo feed system with a ball screw and rotary motor will gradually be replaced by a direct drive system. The precision motion system driven by a permanent magnet linear synchronous motor (PMLSM) offers several advantages, including high speed, high acceleration, and high positioning accuracy. However, the operating precision of the feed device will be affected by the PMLSM robustness to nonlinear and uncertain disturbances, such as cogging force, friction, thermal effects, residual vibration, and load disturbance. The aim of this paper was to provide a survey on disturbance analysis and suppression approaches to improve the dynamic performance of PMLSM motion systems. First, the origin and inhibition methods of thrust ripple and friction are presented. Second, the mechanisms, modeling approaches, and mitigation measures of thermal effects are introduced. Additionally, the residual vibration characteristics and suppression methods are discussed. Finally, disturbance observers of periodic and aperiodic loads are introduced. These suppression methods from structural design and control compensation are then discussed in order to improve the dynamic response and steady-state accuracy of PMLSM.

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