Results 171 to 180 of about 2,663 (214)
Influence of Closed Stator Slots on Cogging Torque [PDF]
, 2013 Cogging torque results due interaction of magnetic field of magnets and stator slots, and have negative effects on permanent magnet machines such as vibrations, noise, torque ripples and problems during turbine start-up and cut-in. In order to reduce cogging torque this paper presents a study of influence of closed stator slots on cogging torque using ...
Ion, Trifu +2 more
openaire +2 more sources
Some of the next articles are maybe not open access.
Related searches:
Related searches:
Cogging Torque Dynamic Reduction Based on Harmonic Torque Counteract
IEEE Transactions on Magnetics, 2022This paper presents a method to reduce cogging torque in permanent magnet (PM) machines from dynamic control based on harmonic torque counteract (HTC). We find the possibility of dynamic cancellation of cogging torque and harmonic torque by studying their generation mechanism and period characteristics, and further study the current harmonic injection ...
Jian Gao +5 more
openaire +1 more source
Cogging Torque Analysis of Magnetic Gear
IEEE Transactions on Industrial Electronics, 2012This paper describes the harmonic spectra of the cogging torque of a magnetic gear. The operating principle of this gear is described, and the transmission torque under operation in accordance with the gear ratio is mathematically formulated. In particular, the harmonic order of the cogging torque is described in detail.
Noboru Niguchi, Katsuhiro Hirata
openaire +1 more source
Cogging torque reduction methods
2014 Electric Power Quality and Supply Reliability Conference (PQ), 2014This 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
2005 European Conference on Power Electronics and Applications, 2005
In this paper the cogging torque of an existing permanent magnet DC motor must be increased. Thus motors are frequently used in motor vehicles. In order to hold a position the motor must be under current, because in most cases the cogging torque is too small to keep the motor in position.
J. Bacher, G. Maier
openaire +1 more source
In this paper the cogging torque of an existing permanent magnet DC motor must be increased. Thus motors are frequently used in motor vehicles. In order to hold a position the motor must be under current, because in most cases the cogging torque is too small to keep the motor in position.
J. Bacher, G. Maier
openaire +1 more source
A reduction method of cogging torque for IPMSM
2005 International Conference on Electrical Machines and Systems, 2005This 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 +3 more
openaire +1 more source
Cogging Torque Calculation with Field Smoothing
INTERMAG 2006 - IEEE International Magnetics Conference, 2006The Maxwell stress tensor is one of the most widely used method that can get the force or torque values of electromagnetic devices. This method is very simple and easy to apply in both global and local force calculation. But, trying to use the Maxwell stress tensor method, we have to pay attention to the integration path and the discontinuity of ...
S. Won, J. Lee
openaire +1 more source
Cogging torque estimation for sensorless PMSM
2012 XXth International Conference on Electrical Machines, 2012A major issue for mass produced permanent magnet synchronous motors (PMSM) is the minimization of acoustic noise. A significant source of this noise is cogging torque. Design related cogging torque that does not vary between motors can be compensated by a predetermined control scheme.
Ben Saunders +3 more
openaire +1 more source
Cogging torques in induction machines
Proceedings of the Institution of Electrical Engineers, 1968Depending on the choice of design parameters, an induction machine can produce a cogging torque sufficiently high to give rise to locking at standstill. It is noted that the commonly used method of analysis of these torques, involving permeance waves, is strictly incorrect, and its use in conjunction with the ‘overlap’ method is inaccurate.
openaire +1 more source
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
openaire +1 more source