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Title: Dynamic performance analysis of permanent magnet contactor with a flux-weakening control strategy
Authors: Wang, X
Lin, H
Fang, S
Jin, P
Wang, J
Ho, SL 
Keywords: Contactors
Finite element analysis
Intelligent control
Magnetic flux
Permanent magnets
Pulse width modulation
Runge-Kutta methods
Issue Date: 1-Apr-2011
Publisher: American Institute of Physics
Source: Journal of applied physics, 1 Apr. 2011, v. 109, no. 7, 07E707, p. 1-3 How to cite?
Journal: Journal of applied physics 
Abstract: A new flux-weakening control strategy for permanent magnet contactors is proposed. By matching the dynamic attraction force and the antiforce, the terminal velocity and collision energy of the movable iron in the closing process are significantly reduced. The movable iron displacement is estimated by detecting the closing voltage and current with the proposed control. A dynamic mathematical model is also established under four kinds of excitation scenarios. The attraction force and flux linkage are predicted by finite element method and the dynamics of the closing process is simulated using the 4th-order Runge-Kutta algorithm. Experiments are carried out on a 250A prototype with an intelligent control unit to verify the proposed control strategy
ISSN: 0021-8979 (print)
1089-7550 (online)
DOI: 10.1063/1.3549554
Rights: © 2011 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in X. Wang et al., J. Appl. Phys. 109, 07E707 (2011) and may be found at
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