Results 11 to 20 of about 184,078 (165)

Investigation of Torque and Reduction of Torque Ripples through Assisted-Poles in Low-Speed, High-Torque Density Spoke-Type PMSMs

Machines
In this article, rotor designs utilizing assisted-poles are investigated for a high-torque density spoke-type permanent magnet synchronous machine (PMSM) with fractional slot concentrated winding (FSCW) to explore the rich air-gap magnetic field harmonics and torque generation mechanism.
Jian-Xin Shen, Sayyed Haleem Shah
exaly   +3 more sources

High Torque Density Permanent Magnet Brake

Journal of Physics: Conference Series, 2021
Abstract As the braking device of the aircraft electromechanical actuation system, the brake is a vital link in the aircraft attitude change or function adjustment. Among them, the permanent magnet brake has attracted extensive attention in the field of aerospace technology because of its advantages of low energy consumption and high ...
Qiang Yue, Hao Qian
openaire   +1 more source

An Axial Magnetic Gear With Improved Torque Density and Reduced Cogging Torque

Iranian Journal of Electrical and Electronic Engineering, 2021
A new axial magnetic gear (AMG) with enhanced torque density and reduced cogging torque is proposed in this paper. In the new structure, the direction and width of permanent magnets in high-speed rotor are changed and permanent magnets are removed from the modulator while the low-speed rotor remains unchanged.
Sepaseh, J., Rostami, N., Feyzi, M. R.
openaire   +2 more sources

Spin-transfer torque in helical spin-density waves [PDF]

Physical Review B, 2009
6 pages 2 ...
Wessely, O., Skubic, B., Nordstrom, L.
openaire   +2 more sources

High-Torque-Density IPMSM Rotor Pole Geometry Adjustment for Smooth Torque [PDF]

IEEE Access, 2019
High-torque-density electrical machines applied to traction operate at a varying torque and speed, and therefore, when minimizing the torque ripple, a wide variety of possible loads must be considered. Different loads need different current vectors, which affect the magnetic state of the machine.
Ilya Petrov, Pia Lindh, Markku Niemela, Eero Scherman, Juha Pyrhonen   +4 more
openaire   +2 more sources

Spin Transfer Torques in MnSi at Ultralow Current Densities [PDF]

Science, 2010
Spin Control Controlling and manipulating the spin of an electron is a central requirement for applications in spintronics. Some of the challenges researchers are facing include efficient creation of spin currents, minimization of Joule heating, and extending the lifetime of electronic spins, which is especially important for ...
Jonietz, F., Muhlbauer, S., Pfleiderer, C., Neubauer, A., Munzer, W., Bauer, A., Adams, T., Georgii, R., Boni, P., Duine, R. A., Everschor, K., Garst, Markus, Rosch, A.   +12 more
openaire   +7 more sources

The baroclinic secondary instability of the two-dimensional shear layer [PDF]

, 2000
The focus of this study is on the numerical investigation of two-dimensional, isovolume, high Reynolds and Froude numbers, variable-density mixing layers. Lagrangian simulations, of both the temporal and the spatial models, are performed. They reveal the
Altman, Beale, Brown, Chorin, Corcos, Corcos, Dimotakis, Dritschel, Ghoniem, Ghoniem, Grinstein, Inoue, Jean Reinaud, Laurent Joly, Leonard, Lundgren, Metcalfe, Michalke, Michalke, Patrick Chassaing, Rogers, Soteriou, Staquet, Thorpe, Thorpe   +24 more
core   +3 more sources

Iron loss in permanent-magnet brushless AC machines under maximum torque per ampere and flux weakening control [PDF]

, 2002
The airgap flux density distribution, flux density loci in the stator core, and the associated iron loss in two topologies of brushless AC motor, having a surface-mounted magnet rotor and an interior-mounted magnet rotor, respectively, are investigated ...
Chen, Y.S., Howe, D., Zhu, Z.Q.
core   +1 more source

High Torque Density Torque Motor With Hybrid Magnetization Pole Arrays for Jet Pipe Servo Valve

IEEE Transactions on Industrial Electronics, 2020
Torque motor is one key component that directly influences the dynamic performance of jet pipe servo valve in aircraft. In this paper, a novel torque motor with hybrid-magnetization pole arrays is proposed. By changing the magnetization patterns of permanent magnets, the torque motor can significantly improve the output torque by range of 47–52 ...
Qiongfang Zhang, Liang Yan, Zihao Duan, Zongxia Jiao, Chris Gerada, I-Ming Chen   +5 more
openaire   +2 more sources

Energy-efficient domain wall motion governed by the interplay of helicity-dependent optical effect and spin-orbit torque [PDF]

, 2019
Spin-orbit torque provides a powerful means of manipulating domain walls along magnetic wires. However, the current density required for domain wall motion is still too high to realize low power devices.
Hehn, Michel, Lin, Xiaoyang, Malinowski, Gregory, Mangin, Stéphane, Ravelosona, Dafiné, Xu, Yong, Zhang, Boyu, Zhao, Weisheng, Zhu, Daoqian   +8 more
core   +2 more sources