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Cogging torque of permanent magnet electric machiens: An overview
2009 Canadian Conference on Electrical and Computer Engineering, 2009Permanent magnet electric machine (PMEM) is widely employed in variety of applications because of their numerous advantages beyond other electric machines. Cogging torque is caused by the reluctance change between the stator teeth and magnet poles on the rotor, this is an inherent characteristic of PMEM.
Zhenhong Guo, Liuchen Chang, Yaosuo Xue
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Cogging torque and torque ripple reduction of modular permanent magnet machines
2016 XXII International Conference on Electrical Machines (ICEM), 2016In order to minimize the cogging torque and torque ripple for surface mounted permanent magnet (SPM) machines, this paper proposes a C-core modular stator which can be obtained by inserting flux gaps (FGs) into every stator tooth. The electromagnetic performances of C-core modular PM machines such as open-circuit flux linkage, phase back-EMF, cogging ...
G. J. Li, B. Ren, Z. Q. Zhu
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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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Analytical prediction of the cogging torque and torque constant of a hybrid stepping motor
Journal of Magnetism and Magnetic Materials, 2002We present an analytic method to efficiently calculate the torque constant and cogging torque of a hybrid stepping motor. The feature of the proposed method is its computational efficiency in that it is a useful tool for the motor design which is aimed at reducing the level of cogging torque or increasing the torque constant. This method is verified by
Shyh-Jier Wang, Shir-Kuan Lin
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Torque and cogging torque in sandwich type CD-ROM spindle motor
IEEE Transactions on Magnetics, 1998The sandwich type CD-ROM spindle motor has intrinsic dominance of manufacture and cost. This paper will propose a reference formula of torque constant Kt according to the experimental results, accounting for the mechanism of dead point, and finally introducing a design method to prevent dead point and to reduce the cogging torque.
C.M. Chao +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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Study of cogging torque in permanent magnet machines
IAS '97. Conference Record of the 1997 IEEE Industry Applications Conference Thirty-Second IAS Annual Meeting, 2002Cogging torque is produced in a permanent magnet machine by the magnetic attraction between the rotor mounted permanent magnets and the stator. It is an undesired effect that contributes to the machines output ripple, vibration, and noise. This paper analyzes various cogging torque minimization techniques as applied to a permanent magnet machine used ...
C. Studer +3 more
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Cogging Torque Target and Design of Motor for EPS
SAE Technical Paper Series, 2006<div class="htmlview paragraph">This project studied a DC brushless motor for an EPS system that would not cause control performance to decline even when the vehicle was operated with a low steering angle at high vehicle speeds.</div> <div class="htmlview paragraph">First, a target for cogging torque was established to ensure that ...
Atsuhiko Yoneda +2 more
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An analysis of the cogging torque of a dc motor and a new technique of reducing the cogging torque
Electrical Engineering in Japan, 1983Makoto Goto, Kazutsugu Kobayashi
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