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Reduction of cogging forces in linear synchronous motors
1999 IEEE Africon. 5th Africon Conference in Africa (Cat. No.99CH36342), 2003Cogging forces in linear synchronous motors are due to the interaction between the edges of the permanent magnet and the teeth of the primary core. Various techniques can be employed to reduce the cogging force, namely, the optimisation of the magnet length, the use of semi-closed slots, the variation of the air-gap length and skewing.
R.J. Cruise, C.F. Landy
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Magnetic gear: Radial force, cogging torque, skewing and optimization
2015 IEEE Energy Conversion Congress and Exposition (ECCE), 2015Magnetic gears are able to transmit torque between an input and an output shaft without mechanical contact. As for electrical drives, torque density, acoustic noise, and torque ripple are of primary concern. This paper describes the influence of the pole numbers on the radial forces and the cogging torques.
Gerald Jungmayr +4 more
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Research on the Method of Reducing Cogging Force of Vernier Motor
2019 22nd International Conference on Electrical Machines and Systems (ICEMS), 2019In this paper, the method of reducing the cogging force of permanent magnet vernier motor(PMVM) by auxiliary slots in the top of stator teeth is studied. Fourier decomposition of the analytical formula of the cogging force is carried out, the finite element software ANSYS Maxwell is used to model and simulate the auxiliary slot structure, and the peak ...
Ying Xie, Cheng Pi, Zhaoyang Ning
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Minimization of cogging force in a linear permanent magnet motor
IEEE Transactions on Magnetics, 1998A finite element/analytically based method is used to aid the minimization of cogging force, due to slotting and the finite length of the ferromagnetic core, in a tubular brushless permanent magnet motor. The method is validated against both finite element calculations and measurements on a prototype motor.
P.J. Hor +3 more
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Coordinated Adaptive Robust Contouring Control of an Industrial Biaxial Precision Gantry With Cogging Force Compensations [PDF]
IEEE Transactions on Industrial Electronics, 2010 Cogging force is an important source of disturbances for linear-motor-driven systems. To obtain a higher level of contouring motion control performance for multiaxis mechanical systems subject to significant nonlinear cogging forces, both the coordinated
Chuxiong Hu, Bin Yao, Qingfeng Wang
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Rolling Force Research on Cogging Rolling of H-Beam
Key Engineering Materials, 2010Due to the complexity of H-beam’s cross section, it is difficult to calculate the rolling force and force torque accurately using classic formulas conveniently when H-beams of new size are developed. This paper describes an investigation into the reversing process of H-beam using MARC software and compares the results with rolling data from the ...
Qin Qin +3 more
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Reduction of cogging force in slotlesslinear permanent magnet motors
IEE Proceedings - Electric Power Applications, 1997There are two potential causes of cogging force in linear permanent magnet motors, resulting from the slotting and the finite length of the iron-cored armature. The paper is concerned with slotless motors, for which a technique is described for minimising the cogging force which is produced when the armature has a mild steel sleeve (yoke). By analysing
Zhu, ZQ, Xia, ZP, Howe, D, Mellor, PH
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Study on Cogging Force of TPMLSM with Multi-Segment Primary
2016 IEEE Vehicle Power and Propulsion Conference (VPPC), 2016In this paper, a method of restraining the cogging force in tubular permanent magnet linear motor with multi-segment primary based on primary iron-cores shifting is proposed, the mechanism of weakening cogging force in tubular permanent magnet linear motor with primary iron-cores shifting is analyzed based on the energy method., and the formula of ...
Ning-Ning Ren +2 more
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Cogging Force Optimization of Double-Sided Tubular Linear Machine With Tooth-Cutting
IEEE Transactions on Industrial Electronics, 2022The double-sided tubular linear machine (DSTLM) has a more compact structure than general single-sided motors, resulting in a higher power density, typically at the cost of a higher cogging force. To reduce this aspect and make it more suitable for applications in wave energy conversion systems or elevator driver systems, a new tooth-cutting topology ...
Liang Guo 0006 +3 more
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