A New Hybrid Excited Magnetic Levitation Feeding Platform

Frictional resistance is an inherent problem to traditional feeding platforms of NC machine tools, while magnetic levitation is a good solution. The structure and operating principle of a magnetic levitation feeding platform based on the hybrid excited linear synchronous motor are proposed, and the FEA to the electromagnetic force and normal force of the motor is launched using Maxwell2D. To the problem of force ripple two optimization methods are adopted by simulating to prove the feasibilities of the direct driving by hybrid excited linear synchronous motors and the frictionless feeding of NC machine tools.

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Study on Dynamic Performance of Linear Direct Drive Based on Pole Placement

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.215-216.926 ◽

2012 ◽

Vol 215-216 ◽

pp. 926-929 ◽

Cited By ~ 2

Author(s):

Chao Pan ◽

Jian Min Zuo ◽

Mu Lan Wang

Keyword(s):

Theoretical Analysis ◽

Disturbance Rejection ◽

Machine Tools ◽

Dynamic Performance ◽

Parameter Variation ◽

Pole Placement ◽

Direct Drive ◽

Synchronous Motors ◽

Linear Synchronous Motors ◽

Force Ripple

Permanent magnet linear synchronous motors (PMLSM) can serve as direct drive actuators for machine tools. However, PMLSM is more easily affected by load disturbance, force ripple and parameter variation. As a result, the design of an appropriate controller and research on dynamic performance are very important for PMLSM. In this paper, a feedback controller based on pole-placement is proposed to achieve desired tracking performance. The effectiveness and feasibility of the proposed method are demonstrated through theoretical analysis. The dynamic response and disturbance rejection ability for linear servo system were researched and the parameters which influence the dynamic performance of the system were discussed.

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Research on Permanent Magnet Linear Motor without Friction Feed

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.383-390.681 ◽

2011 ◽

Vol 383-390 ◽

pp. 681-686

Author(s):

Yi Peng Lan ◽

Hui Zhao ◽

Hong Xuan Lan

Keyword(s):

Magnetic Field ◽

Permanent Magnet ◽

Electromagnetic Force ◽

Machine Tools ◽

Magnetic Levitation ◽

Linear Motor ◽

Virtual Displacement ◽

Nc Machine ◽

Nc Machine Tools ◽

Permanent Magnet Linear Motor

In order to eliminate the friction of the feed system in NC Machine Tools, this paper presented a novel direct magnetic levitation permanent magnet linear motor. First, the structure and magnetic levitation theory of the direct magnetic levitation motor were discussed. Second, on the basis of the motor magnetic hierarchical model, the expression of the magnetic field and the electromagnetic force was derived by the virtual displacement method. Finally, no-load magnetic field, load air-gap flux density and the electromagnetic force of the motor were simulated by using Ansoft Maxwell 2D software. The results of simulation test indicated that using direct magnetic levitation permanent magnet linear synchronous motor can realize the friction-free feed of NC Machine Tools.

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