Results 281 to 290 of about 2,164,521 (333)

Minimization of cogging force in a linear permanent magnet motor

IEEE Transactions on Magnetics, 1998
A finite element/analytically based method is used to aid the minimization of cogging force, due to slotting and the finite length of the ferromagnetic core, in a tubular brushless permanent magnet motor. The method is validated against both finite element calculations and measurements on a prototype motor.
P.J. Hor, Z.Q. Zhu, D. Howe, J. Rees-Jones   +3 more
openaire   +1 more source

Cogging force reduction of two-phase linear hybrid stepping motor

IEEE Transactions on Magnetics, 2005
This paper presents a /spl pi//4-multiple-coupled two-phase linear hybrid stepping motor (LHSM) that has two windings per phase, one of which shares the other phase winding. The proposed motor shows a unique ability to deliver low cogging force without any complex control scheme or additional power electronics hardware in microstepping control.
null Jul-Ki Seok, null Tai-Sik Hwang
openaire   +1 more source

Cogging force analysis of linear motor arrays driving the Thirty Meter Telescope

2011 IEEE 54th International Midwest Symposium on Circuits and Systems (MWSCAS), 2011
A finite element analysis of the cogging force generated by an array of linear synchronous motors moving on a curvilinear track is presented. This system is under consideration as the driving system for the two main axes of the Thirty Meter Telescope that will be built in Mauna Kea, Hawaii.
Gilardi, Gabriele, Szeto, Kei, Huard, Steve, Park, Edward J.   +3 more
openaire   +2 more sources

Analytical Cogging Torque and Unbalanced Magnetic Force Calculations in Slotted Surface-PM Machines Assuming Finite Iron Permeability

IEEE Transactions on Transportation Electrification
In this article, a fast analytical approach is proposed to predict the magnetic field distribution in slotted surface mounted permanent magnet machines (SSPMMs) using a generalized formulation of Fourier analysis.
M. H. Javanmardi, A. Rahideh, V. Z. Faradonbeh   +2 more
semanticscholar   +1 more source

Design Modifications for Cogging Force Reduction in Linear Permanent Magnet Machines

2020 IEEE International Conference on Power and Energy (PECon), 2020
The capability of Linear Permanent Magnet (LPM) machines to produce high thrust and power density are being utilized in industrial and defense sectors these days. However, the reluctance variation faced by secondary magnet flux due to primary slotting and end effects produces detent or cogging force, which results in high force ripples, noise and ...
Praveen Kumar, Lovesh B. Xaxa, R. K. Srivastava   +2 more
openaire   +1 more source

Cogging force mitigation of tubular permanent magnet machines with magnet dividing

2007 International Conference on Electrical Machines and Systems (ICEMS), 2007
Cogging force produced in a tubular permanent magnet machines due to the interaction between the permanent magnets and the stator teeth causes an undesired vibration and noise. In applications such as robotics there is a need for precise position control and for this purpose force pulsation should be minimized.
Mahdi A. Shabani, Jafar Milimonfared, Samad Taghipour   +2 more
openaire   +1 more source

Research of the Cogging Force in TPMLSM with Unequal Pole-Pitch

2016 IEEE Vehicle Power and Propulsion Conference (VPPC), 2016
Cogging force is one of the main factors causing the thrust fluctuation of permanent magnet synchronous linear motor, in order to effectively suppress the influence of cogging force on the thrust fluctuations, cogging force is analytical analyzed based on energy method and Fourier decomposition method ,this paper proposes unequal pole-pitch method of ...
Ning-Ning Ren, Huai-Shu Li, Zhi-Qiang Xue   +2 more
openaire   +1 more source

Reduction of cogging force in PM linear motors by pole-shifting

IEE Proceedings - Electric Power Applications, 2005
A technique is described to reduce cogging force in permanent-magnet linear motors due to the interaction between the permanent magnets (PMs) and the stator teeth. It consists of a proper shift of the PMs so that this effect is compensated for among the poles of the machine.
BIANCHI, NICOLA, BOLOGNANI, SILVERIO, DELLA FRANCESCA CAPPELLO A.   +2 more
openaire   +2 more sources

Quantitative feedback control of a linear positioning stage with cogging force compensation

2008 3rd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, 2008
Quantitative feedback control of a linear positioning stage with cogging force compensation is presented. Positioning stage direct-driven by linear motors commonly suffers from significant mechanical resonances at high acceleration rates. Which is solved by using a tracking control scheme based quantitative feedback theory (QFT).
null Shangying Zhang, null Xuedong Chen, null Haihua Mu, null Hui Zhao   +3 more
openaire   +1 more source

Determination of tooth cogging force in a hard-disk brushless DC motor

IEEE Transactions on Magnetics, 2005
The paper proposes a new method to determine the tooth cogging force in a brushless DC (BLDC) motor which is used in a hard-disk application. This force might be a source of tooth vibrations and motor noise. In the new method, the permanent-magnet (PM) poles are substituted with their equivalent currents.
M. Markovic, M. Jufer, Y. Perriard
openaire   +1 more source