Results 311 to 320 of about 116,465 (358)
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Airgapless Electric Motors With an External Rotor
IEEE Transactions on Industrial Electronics, 2018This paper proposes a new family of electric motors based on the concept of an airgapless device. In this type of device, the rotor is allowed to touch the stator at a contact point, which maximizes the internal flux and, therefore, the electromagnetic torque. A higher torque density motor is proposed in this paper due to a reduced reluctance caused by
Maryam Alibeik +4 more
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The rotor bearings of electricity meters
Journal of the Institution of Electrical Engineers, 1929In this paper an accumulation of experimental and statistical data which have been obtained by the author has been brought under review for the purpose of discussing the leading problem in the sphere of meter maintenance, namely that of worn bearings.Attention is drawn to the necessity for improving the reliability of meters in service in consequence ...
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Electric generator using a triangular diamagnetic levitating rotor system
Review of Scientific Instruments, 2009This paper describes a feasibility study of creating a small low friction and low maintenance generator using a diamagnetically stabilized levitating rotor. The planar rotor described in this paper uses a triangular configuration of magnets that generates emf by passing over coils placed below the rotor.
Joe Nhut, Ho, Wei-Chih, Wang
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Finite-Element Analysis for a Rolling-Rotor Electrical Machine
IEEE Transactions on Magnetics, 2010A method for finite-element analysis of a rolling-rotor electrical machine was developed. The conventional moving-band technique for modeling motion was replaced by an element structure of radial bands in the air gap. This finite-element scheme allows a large distortion of the elements at the contact point of stator and rotor without suffering of ...
Biernat, Adam +7 more
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2009 IEEE Power & Energy Society General Meeting, 2009
In this paper, decoupled control of rotor torque and rotor electric power in a reluctance wound rotor brushless doubly fed machine, (BDFM), is presented. The machine stator windings are fed from two separate voltage source inverters. The proposed control technique is applied to the inverters such that the BDFM is capable of producing mechanical torque ...
A. S. Abdel-Khalik +4 more
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In this paper, decoupled control of rotor torque and rotor electric power in a reluctance wound rotor brushless doubly fed machine, (BDFM), is presented. The machine stator windings are fed from two separate voltage source inverters. The proposed control technique is applied to the inverters such that the BDFM is capable of producing mechanical torque ...
A. S. Abdel-Khalik +4 more
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8th IET International Conference on Power Electronics, Machines and Drives (PEMD 2016), 2016
This paper investigates the torque and vibration signal spectra of wound rotor induction machines when subjected to different levels of rotor electrical unbalance. A harmonic machine model numerical study is first performed to identify the electromagnetic torque signal spectral components related to operation without or with electrical unbalance.
D.S. Vilchis-Rodriguez +5 more
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This paper investigates the torque and vibration signal spectra of wound rotor induction machines when subjected to different levels of rotor electrical unbalance. A harmonic machine model numerical study is first performed to identify the electromagnetic torque signal spectral components related to operation without or with electrical unbalance.
D.S. Vilchis-Rodriguez +5 more
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Rotor Surface Ferrite Permanent Magnets in Electrical Machines: Advantages and Limitations
IEEE Transactions on Industrial Electronics, 2017Permanent-magnet synchronous machines (PMSM) are gaining a foothold in a growing number of applications. However, the high cost of these machines compared with the prices of induction motors, whose production process is mature and material costs are low, limits the use of PMSMs with rare-earth permanent magnets in many potential cases.
Petrov, Ilya +4 more
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2011
The invention relates to a rotor (1) of an electric machine, which is formed from individual segments (2), wherein each individual segment (2) comprises a first part (4), which in the assembled state is in contact with a second corresponding part (5) of the adjacent individual segment.
DAIMLER AG, KOENIG WERNER
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The invention relates to a rotor (1) of an electric machine, which is formed from individual segments (2), wherein each individual segment (2) comprises a first part (4), which in the assembled state is in contact with a second corresponding part (5) of the adjacent individual segment.
DAIMLER AG, KOENIG WERNER
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ELECTRICAL MACHINE COMPRISING DISC ROTORS
2001The invention relates to an electrical machine comprising at least two disc rotors. Each disc rotor is equipped with a number of permanent magnets, which generate axially oriented magnetomotive forces and which are uniformly distributed over the periphery.
GENIUS INGENIEUR GMBH, POESCHL GUENTER
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Superconducting wound rotor for axially excited electrical motor
Journal of Physics and Chemistry of Solids, 2006The development of HTS motors of the fractional range has shown the relevance of the design of the rotor where the opportunity to apply HTS in both BSCCO tapes and YBCO bulks has been demonstrated as an efficient way to increase the power density. In this work we report on a BSCCO wound rotor axially excited showing the advantages over equivalent ...
A. González +3 more
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