Results 231 to 240 of about 338,387 (269)

Cogging torque sensitivity to permanent magnet tolerance combinations

Archives of Electrical Engineering, 2013
Abstract This study presents the dependence of the level and harmonic structure of the cogging torque in permanent magnet synchronous motors (PMSM) to imperfections of permanent magnet (PM) dimensions and positions, which can not be avoided in massproduction.
Lovrenc Gašparin, Rastko Fišer
openaire   +1 more source

Study of cogging torque in permanent magnet machines

IAS '97. Conference Record of the 1997 IEEE Industry Applications Conference Thirty-Second IAS Annual Meeting, 2002
Cogging 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, A. Keyhani, T. Sebastian, S.K. Murthy   +3 more
openaire   +1 more source

Cogging Torque in Flux-Switching Permanent Magnet Machines

IEEE Transactions on Magnetics, 2009
The influence of manufacturing tolerances on the cogging torque waveforms, as well as the back-EMF waveforms, in 3- and 5-phase flux-switching permanent magnet (FSPM) machines having different numbers of stator/rotor poles is investigated by finite element analyses and experiments.
Z.Q. Zhu, A.S. Thomas, J.T. Chen, G.W. Jewell   +3 more
openaire   +1 more source

Cogging Torque Minimization in PM Motors Using Robust Design Approach

IEEE Transactions on Industry Applications, 2010
Cogging torque minimization is necessary for low torque ripple applications such as precision tooling, robotics etc. Various techniques are available but few techniques are proved to be effective in mass production under manufacturing tolerances/variations. The research provides a design approach to minimize cogging torque by making the motor robust to
Mohammad Islam, Rakib Islam, Tomy Sebastian, Ashok Chandy, Suat Ozsoylu   +4 more
openaire   +1 more source

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
openaire   +1 more source

Boundary element method in reduction of cogging torque

IEEE Transactions on Magnetics, 1998
A method to optimize the cogging torque of a brushless motor with parallel magnetized magnets is presented. The technique is based on the boundary element method. The optimal width of the magnet and the optimal shifts of the consecutive magnets are computed.
openaire   +1 more source

Study of Cogging Torque in Permanent Magnet Machines

Electric Machines & Power Systems, 1999
Cogging 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 ...
openaire   +1 more source

Torque Ripple and Cogging Torque Reduction Method of IPMSM Using Asymmetric Shoe of Stator and Notch in Stator

Journal of Electrical Engineering and Technology, 2022
J. Moon, Dong-Woo Kang
semanticscholar   +1 more source

Asymmetrical Magnets in Rotor Structure of a Permanent Magnet Brushless DC Motor for Cogging Torque Minimization

Journal of Electrical Engineering and Technology, 2022
T. A. Anuja, M. A. Doss
semanticscholar   +1 more source

Cogging torques in induction machines

Proceedings of the Institution of Electrical Engineers, 1969
J. Štěpina, K.J. Binns
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