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Research on Cogging Torque Weakening of Direct‐Drive Permanent Magnet Motor with Inner Enhance Force
IEEJ TRANSACTIONS ON ELECTRICAL AND ELECTRONIC ENGINEERING, 2021This paper proposes a simple and efficient method to weaken the cogging torque of the direct‐drive permanent magnet motor with inner enhance force (IEF‐DDPMM).
Jiaxu Zhang +3 more
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Cogging force alleviation in linear permanent magnet generators
AFRICON 2009, 2009In this paper a three-phase linear permanent magnet generator is designed for direct waves energy conversion. Its performance is then simulated using analytical and finite element method. Cogging force in this generator causes the oscillatory output power, shortens life time and increases the maintenance cost of the generator.
Jawad Faiz +2 more
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Cogging Force Reduction in Tubular Permanent Magnet Actuators
2007 IEEE International Electric Machines & Drives Conference, 2007This paper describes a method to reduce cogging force in the design of a tubular slotted PM actuator for industrial applications. A comprehensive analysis is undertaken by considering a pre-established design in coherence with extended 2D finite element analysis, which enables the determination of the cogging force associated both with the stator ...
Janssen, J.L.G. +3 more
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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 Linear Permanent-Magnet Generators
IEEE Transactions on Magnetics, 2010Although linear permanent-magnet generators (LPMGs) are widely used for converting wave energy into electrical energy, they suffer from large cogging force. The cogging force causes oscillatory output power, which shortens lifetime and increases the maintenance costs of the generators.
Jawad Faiz +2 more
openaire +1 more source
Cogging-force-reduction techniques for linear permanent-magnet machines
IEE Proceedings - Electric Power Applications, 2005The paper describes two techniques for reducing the cogging force associated with the finite length of the ferromagnetic armature core of a tubular permanent-magnet machine. Analytical expressions for predicting the cogging force which is associated with armature cores having skewed or stepped end faces are established, and a cogging-force-minimisation
J. Wang, M. Inoue, Y. Amara, D. Howe
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Reduction of cogging force in linear generators for wave energy harvesting
OCEANS 2022, Hampton Roads, 2022Due to huge energy potential of sea waves, many technologies have been proposed in the last few years. Some concepts have been developed and sometimes also tested in the open sea. Some prototypes use linear generators to directly convert the vertical motion of buoys into electrical energy. This solution minimizes the numbers of energy conversion steps,
Curto, Domenico +7 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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2016 Eleventh International Conference on Ecological Vehicles and Renewable Energies (EVER), 2016
A novel linear-rotary permanent magnet actuator (LRPMA) is proposed in this paper, in which ferromagnetic poles and PM poles are mounted on the mover surface. A 3D analytical model without considering the stator slotting effect is presented for calculating no-load air-gap magnetic field, which transfers the tubular mover of the proposed LRPMA into a ...
Kaikai Guo +5 more
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A novel linear-rotary permanent magnet actuator (LRPMA) is proposed in this paper, in which ferromagnetic poles and PM poles are mounted on the mover surface. A 3D analytical model without considering the stator slotting effect is presented for calculating no-load air-gap magnetic field, which transfers the tubular mover of the proposed LRPMA into a ...
Kaikai Guo +5 more
openaire +1 more source
A linear hybrid switched reluctance motor with zero cogging force
2015 IEEE Magnetics Conference (INTERMAG), 2015Linear permanent magnet motors (LPMM) and linear switched reluctance motors (LSRMs) are suitable for translational, direct-drive position control applications. Several linear permanent magnet motors (LPMMs) have been investigated [1-3]. However, there often exists unavoidable cogging forces from LPMMs that require additional control algorithms to ...
Y. Zou, S. Or, J. Pan
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