Results 181 to 190 of about 3,143 (231)

Cogging torque reduction methods

2014 Electric Power Quality and Supply Reliability Conference (PQ), 2014
This paper considers the study of methods for reduction of the cogging torque in permanent magnet machines. Cogging torque has been analyzed to be reduced by slot skewing, width of slot opening, magnet pole radius and also by mounting of the magnets.
Oleg Kudrjavtsev, Aleksander Kilk
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A reduction method of cogging torque for IPMSM

2005 International Conference on Electrical Machines and Systems, 2005
This 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, T. Sato, I. Miki, M. Nakamura   +3 more
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Cogging Torque Reduction by Elementary-Cogging-Unit Shift for Permanent Magnet Machines

IEEE Transactions on Magnetics, 2017
This paper describes a method to reduce cogging torque in permanent magnet (PM) machines by shifting elementary-cogging unit (ECU). The ECU division principle and the feature of cogging torque produced by ECU are also discussed. The proper shift angles for each ECU are deduced according to both fractional and integral slot number per pole, by which any
Jian Gao, Guang Wang, Xiao Liu, Wenjuan Zhang, Shoudao Huang, Huimin Li   +5 more
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Reduction of cogging torque in permanent magnet motors

IEEE Transactions on Magnetics, 1988
Cogging 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 and torque ripple reduction of modular permanent magnet machines

2016 XXII International Conference on Electrical Machines (ICEM), 2016
In 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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Cogging Torque Reduction in a Permanent Magnet Wind Turbine Generator

ASME 2002 Wind Energy Symposium, 2002
Most small wind turbines use permanent magnet (PM) generators. The generators are usually direct-drive (i.e., no gearbox is required). Direct-drive PM generators are characterized by low maintenance and high efficiency. Small wind turbines are usually self-starting and require very simple controls.
E. Muljadi, J. Green
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Cogging Torque Reduction of a Single-Phase Brushless DC Motor

7th Joint MMM-Intermag Conference. Abstracts (Cat. No.98CH36275), 1998
In this research, the cogging torque of a newly designed single-phase brushless DC motor used in CD-ROM application is investigated. A finite element method is employed to numerically analyze the magnetic field distribution inside the motor, in which a three-dimensional mesh is constructed.
null Der-Ray Huang, null Tai-Fa Ying, null Shyh-Jier Wang, null Chi-mou Zhou, null Yin Kwang Lin, null Kai-Wen Su, C.-I.G. Hsu   +6 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, 2018
Purpose 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, Kamel Boughrara, Rachid Ibtiouen   +2 more
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Cogging Torque Reduction of Hybrid Excitation Flux Switching Motor

2015 Fifth International Conference on Instrumentation and Measurement, Computer, Communication and Control (IMCCC), 2015
This paper analyzes the cogging torque mechanism of the hybrid excitation flux switching motor. The finite element analysis (FEA) is used to study different cogging torque suppression methods of the motor. These methods include rotor skewing, variable tooth width, auxiliary slot, variable rotor arcs.
J.H. Hu, L. Wang, J.B. Zou, B. Zhao
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Cogging torque reduction with pole slot combination and notch

2014 International Conference on Electrical Engineering and Computer Science (ICEECS), 2014
In this paper, we examine the basic method of reducing cogging torque by using the combination of slot and pole number with a simple software. The methods were applied to basic permanent machine designs and the performance was calculated using finite-element analysis (FEA).
F. Yusivar, H. S. V. Roy, R. Gunawan, A. Halim   +3 more
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