Results 181 to 190 of about 3,245 (229)

Ending Forced Labor In ICE Detention Centers: A New Approach

SSRN Electronic Journal, 2020
Privately managed detention centers hold the majority of immigrant detainees in Immigration and Customs Enforcement custody. Coerced detainee labor in these for-profit facilities is commonplace. The practice contributes significantly to the financial viability of CoreCivic and GEO Group, the two corporations that manage ICE detention centers, but it ...
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Detent Force Calculations of a PMLSM Using the Finite Element Method

IEEJ Transactions on Industry Applications, 2009
This paper presents a Finite Element Analysis of a Permanent Magnet Linear Synchronous Motor. The aim is to obtain an accurate estimation of the detent force without oversize computation. First, some usual techniques dedicated to the calculation of the forces in electromagnetic devices, such as the Virtual Work Method and the Maxwell Stress Tensor, are
Remy, Ghislain, Krebs, Guillaume, Tounzi, Abdelmounaïm, Barre, Pierre-Jean   +3 more
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Detent force minimization of an improved linear permanent magnet synchronous motor

International Journal of Applied Electromagnetics and Mechanics, 2018
Permanent magnet synchronous linear motors (PMSLMs) have been widely used in industry applications due to their outstanding dynamic characteristics and improved servo-capability. However, the detent force of PMSLM is an inevitable problem, which causes vibration and affects the positional accuracy of the machine.
Guo, Rong, Yu, Haitao, Wang, Yao, Chen, Hao, Liu, Xiaomei, Xia, Tao   +5 more
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Characteristics Analysis of a Novel Detent-Force-Based Magnetic Suspension System

Advanced Materials Research, 2011
A novel Detent-force-based Magnetic Suspension System (DMSS) is presented. The topological structure and operating principle of DMSS are analyzed. The characteristics of the axial, radial force and magnetic field and torsion moment are studied with FEA method respectively.
Xiao Zhuo Xu, Xiao Feng Qin, Xu Dong Wang   +2 more
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Research on Detent Force Characteristics of a Linear Flux-Switching Permanent-Magnet Motor

IEEE Transactions on Energy Conversion, 2021
Linear flux-switching permanent-magnet (LFSPM) motors have been proposed for electromagnetic launch system (EMLS). Benefiting from the permanent magnet (PM) settled on the long double-sided primary and the yokeless secondary, the proposed structure has the advantage of high thrust force density and simple structure compared with the traditional linear ...
Ruiwu Cao, Danni Shen, Wei Hua
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Detent force reduction in permanent-magnet linear synchronous motor utilizing auxiliary poles

2009 8th International Symposium on Advanced Electromechanical Motion Systems & Electric Drives Joint Symposium, 2009
This paper proposes a novel technique to reduce the detent force in permanent magnet linear synchronous motor (PMLSM) using auxiliary poles. The detent force that is caused by the attraction between permanent magnet (PM) and the iron core without input current can be divided into two components: the slot effect and the end effect.
Y.W. Zhu, Y.H. Cho
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Design strategy for detent force reduction of permanent magnet linear synchronous motor

Journal of Shanghai University (English Edition), 2008
The detent force of a permanent magnet linear synchronous motor (PMLSM) is analyzed and the corresponding optimization methods are presented to reduce it. The detent force, which is divided into two components, i.e. resulting from the end effect and resulting from the slotting effect, can be analyzed respectively by the finite element method (FEM).
Ying Zhang, You-ping Chen, Wu Ai, Zu-de Zhou   +3 more
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Optimal design of FRLSM to increase thrust and reduce the detent force

Digests of the 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation, 2010
This study presents an optimal configuration of Flux-Reversal Linear Synchronous Motor (FRLSM) with the optimal number of attachment permanent magnets (PMs). The optimal model of 2000 (N) is designed to reduce detent force by redesigning the air-gap structure and skewing.
null Ki-Bong Jang, null Se-Ho Pyo, null Ho-Jin An, null Gyu-Tak Kim   +3 more
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Digital upgrade of drainage detention devices for forced retention

Journal of Environmental Management
Current urban challenges related to local urban flooding require effective preventive measures. This applies particularly to various methods of stormwater retention, including forced retention, and solutions that enable cooperation between small individual retention systems and drainage systems. Therefore, this study presents the results of research on
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Control-Based Reduction of Detent Force for Permanent Magnet Linear Synchronous Motor

IEEE Transactions on Magnetics, 2009
The detent force of the permanent magnet linear synchronous motor (PMLSM) is caused by the interaction between the permanent magnet and the iron core of the mover without input current. It is a function of the mover position relative to the stator. This paper proposes a control based method to reduce the detent force for the PMLSM.
null Yu-Wu Zhu, null Sang-Min Jin, null Koon-Seok Chung, null Yun-Hyun Cho   +3 more
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