Results 161 to 170 of about 746 (206)

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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

Control Strategies for the Identification and Reduction of Cogging Torque in PM Motors

2019 International Conference on Electrical Drives & Power Electronics (EDPE), 2019
In this work two different methods for the identification of the cogging torque in three-phase Permanent Magnet (PM) motors are presented. The cogging torque map carried out from these methods is then used in a Field Oriented Control (FOC) algorithm to mitigate the ripple in speed and torque. The first method uses a high bandwidth position control loop
M. Sumega, P. Rafajdus, G. Scelba, M. Stulrajter   +3 more
openaire   +2 more sources

Review of Design Solutions for Internal Permanent-Magnet Machines Cogging Torque Reduction

IEEE Transactions on Magnetics, 2012
Internal permanent magnet synchronous machinesare spreading in industrial production.They feature high torque density and extended speed rangethat are key issues in many fields of applications, however theircogging torque is typically quite high.Many ...
Claudio Bianchini, Fabio Immovilli, Emilio Lorenzani   +2 more
exaly   +2 more sources

Simulation Study Of The Reduction Of Cogging Torque In Permanent Magnet Motors

1997 IEEE International Magnetics Conference (INTERMAG'97), 1997
The reduction of cogging torque in permanent magnet motors has been studied by varying the geometry shape of the saliencies of the armature core on stator of a 12-pole 9-tooth spindle motor. Mechanism of this reduction is explained by the minimum net integral of the product of normal and tangential magnetic flux with respect to the mechanical angle ...
Y.D. Yao, D.R. Huang, J.C. Wang, S.H. Liou, S.J. Wang, T.F. Ying, D.Y. Chiang   +6 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

A study of cogging torque reduction methods in brushless dc motor

2012 9th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology, 2012
The cogging torque is undesirable effect in the brushless dc (BLDC) motor, causing vibration and audible noises. It arises from the rotor permanent magnet interacting with the steel teeth on the stator. This paper studies the various reduction methods of cogging torque when designing a BLDC motor.
Teeradej Srisiriwanna, Mongkol Konghirun
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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
openaire   +1 more source

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
openaire   +1 more source