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Cogging torques in induction machines
Proceedings of the Institution of Electrical Engineers, 1968Depending on the choice of design parameters, an induction machine can produce a cogging torque sufficiently high to give rise to locking at standstill. It is noted that the commonly used method of analysis of these torques, involving permeance waves, is strictly incorrect, and its use in conjunction with the ‘overlap’ method is inaccurate.
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A reduction method of cogging torque for IPMSM
2005 International Conference on Electrical Machines and Systems, 2005This paper describes a reduction technique of the cogging torque in an interior permanent magnet synchronous motor (IPMSM). IPMSM usually has the flux barrier for preventing the short circuit of magnetic flux near the magnet. The flux barrier can reduce the cogging torque, and therefore the shape of the flux barrier of IPMSM with concentrated winding ...
Y. Kawaguchi +3 more
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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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Permanent magnet shaping for cogging torque and torque ripple reduction of PMSM
COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, 2018Purpose This paper aims to the improvement of permanent magnet shape in the popular permanent magnet synchronous machine (PMSM) is proposed in this paper in view to mitigate cogging torque magnitude and torque ripple. Design/methodology/approach A two-dimensional exact analytical approach of magnetic field distribution is established for the PMSM ...
Brahim Ladghem Chikouche +2 more
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IEEE transactions on energy conversion, 2020
This article proposes a novel analytical model which combines subdomain method and magnet equivalent circuit (MEC) method to predict the cogging torque of surface-mounted permanent magnet (SPM) motors with rotor eccentricity and magnet defects in any ...
W. Tong +4 more
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This article proposes a novel analytical model which combines subdomain method and magnet equivalent circuit (MEC) method to predict the cogging torque of surface-mounted permanent magnet (SPM) motors with rotor eccentricity and magnet defects in any ...
W. Tong +4 more
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Reduction of cogging torque in permanent magnet motors
IEEE Transactions on Magnetics, 1988Cogging torque in a permanent magnet motor, which arises from the interaction of the rotor magnets with the steel teeth on the stator, can be reduced by skewing the stator teeth, but only at the expense of added complexity in stator construction and some loss of output torque.
null Touzhu Li, G. Slemon
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Cogging torque in SPM machine with segmented stator
COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering, 2016Purpose – The purpose of this paper is to evaluate the cogging torque in a surface-mounted permanent magnet (SPM) machine with both uniformly and non-uniformly segmented stator cores and to find out the optimal solution of stator core segmenting. Design/methodology/approach
Jian-Xin Shen +4 more
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Dual-Skew Magnet for Cogging Torque Minimization of Axial Flux PMSM With Segmented Stator
IEEE transactions on magnetics, 2020Reduction of the cogging torque is preferred during the design process of a permanent magnet (PM) synchronous machine (PMSM), especially in the low-speed traction applications.
Lun Jia +4 more
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A Method for Evaluating the Worst-Case Cogging Torque Under Manufacturing Uncertainties
IEEE transactions on energy conversion, 2020Permanent-magnet (PM) motors have been widely used in industrial applications and automobiles. However, owing to the design tolerances, manufacturing uncertainties, and material inconsistency, deviations from the ideal motor inevitably occur with ...
Yongxi Yang +5 more
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Reducing cogging torque by adopting isodiametric permanent magnet
2009 4th IEEE Conference on Industrial Electronics and Applications, 2009In this paper, being based on Fourier expansion and energy method, the analytical expression of cogging torque of permanent magnet(PM) motor is derived, which can be used to analyze the effects of design parameters on cogging torque. Then a new method for reducing cogging torque by adopting isodiametric magnetic pole is proposed.
null Yubo Yang +3 more
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