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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
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Cogging Torque Characteristics of a Magnetic-Geared Motor
IEEJ Transactions on Industry Applications, 2012Purpose The purpose of this paper is to propose a magnetic-geared motor with permanent magnets only on the high-speed rotor as a solution to the problems of magnetic gears. Magnetic gears have some advantages such as no mechanical loss and maintenance-free operation that are not observed in conventional mechanical ...
Noboru Niguchi, Katsuhiro Hirata
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A Study on Reducing Cogging Torque of IPMSM Applying Rotating Tapering
IEEE transactions on magnetics, 2022The interior permanent magnet synchronous motor (IPMSM) has a structure, in which a permanent magnet is inserted inside the rotor and cogging torque is generated in its structure. To solve this problem, various methods for reducing the cogging torque are
Seung-Won Lee, In-Jun Yang, Won-Ho kim
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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
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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
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IEEE Conference on Electromagnetic Field Computation, 2022
In this paper, we investigate the mechanism of cogging torque reduction by optimizing the rotor surface of permanent magnet synchronous machines. The optimizations of both the surface and interior permanent magnet machines are carried out.
K. Yamazaki, Y. Seki
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In this paper, we investigate the mechanism of cogging torque reduction by optimizing the rotor surface of permanent magnet synchronous machines. The optimizations of both the surface and interior permanent magnet machines are carried out.
K. Yamazaki, Y. Seki
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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
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Cogging Torque Reduction by Using Double Skew of Permanent Magnets in Axial Gap Motor
International Conference on Electrical Machines, 2022This paper describes the reduction of cogging torque by designing the permanent magnets in the axial gap motor. In this method, the side shapes of the permanent magnet are designed as a multiplicative waveform.
D. Sato +3 more
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Cogging Torque Reduction by Elementary-Cogging-Unit Shift for Permanent Magnet Machines
IEEE Transactions on Magnetics, 2017This 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 +5 more
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IEEE Transactions on Transportation Electrification
The investigation of design parameters on the cogging torque has been a classical and common research subject over the last few decades. Nevertheless, an accurate analysis of major contributors to the cogging component is still difficult to find in past ...
S. Min
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The investigation of design parameters on the cogging torque has been a classical and common research subject over the last few decades. Nevertheless, an accurate analysis of major contributors to the cogging component is still difficult to find in past ...
S. Min
semanticscholar +1 more source