Results 311 to 320 of about 108,858 (358)
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Electrical Rotors in the Heart
1991Electrophysiological processes in the heart are responsible for impulse formation and conduction. The normal action of these processes is necessary for the production of an efficient contraction. Interruption of impulse formation or conduction [3, 18] by either biological, pathological, or toxicological mechanisms can cause a disruption of the normal ...
D. W. Frazier +4 more
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Determining the Displacement of the Rotor Shaft in an Electrical Machine
Russian Engineering Research, 2019A device is developed for eliminating the displacement of the rotor shaft in electrical machines. The displacement is determined by measuring the transducer capacitance at four equidistant points around the circumference relative to the shaft.
T. A. Novozhilov +2 more
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Measurement of electrical polar symmetry in turbogenerator rotors
Measurement Science and Technology, 2012This paper presents a measurement technique and an analysis of the electrical polar symmetry in turbogenerator rotors using the so-called recurrent pulse comparison with the injection of charge as the excitation source. The polar symmetry should be measured because it provides information that allows electrical insulation failures in the rotor winding ...
A González Vázquez, J Ramírez-Niño
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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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Internal rotor airgap-less electric motors
2017 IEEE Energy Conversion Congress and Exposition (ECCE), 2017This paper proposes a new family of electric motors based on the concept of an airgap-less device with an internal rotor. The internal flux and therefore electromagnetic torque is maximized because the rotor is allowed to touch the stator. The proposed family of motors are competitive in applications where hydraulic motors are prevalent, i.e., low ...
Euzeli Cipriano dos Santos +4 more
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Study on electric motors with bulk superconductors in the rotor
Journal of Materials Processing Technology, 2001Abstract We have studied electric motors using YBCO bulk superconductors in the rotor. The superconductor can be used as a screening material, a magnetic hysteresis material, a flux source, or a secondary conductor, and form several types of motors.
Yuichi Tsuboi, Hiroyuki Ohsaki
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Balancing flexible rotors of large electrical machines
2010 Record of Conference Papers Industry Applications Society 57th Annual Petroleum and Chemical Industry Conference (PCIC), 2010This paper describes how rotors of large electrical machines with bending modes within the speed range can be balanced. A method is described, that allows for high speed balancing in a safe environment (a balancing facility) and avoids correctional balancing in the complete machine setup.
Lutz Huebner, Martin Regener
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Advanced measurement of rotor vibration in electric drives
IEEE Aerospace and Electronic Systems Magazine, 1998The combination of microelectronic acceleration transducers and an RF telemetry link can provide a reliable means of measuring shaft vibrations of electric drives. Clear advantages include the possibility of installing the instrumentation into currently existing motor systems without any need to use flexible couplings or mounts.
P. Eskelinen, Olli Pyrhonen
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Electric Drive with Magnetic Reduction of the Helicopter Main Rotor [PDF]
Russian Aeronautics, 2019 The design and main calculation relations are presented for the driving electric motor with magnetic gear box to drive the helicopter main rotor. The design advantages in terms of volume and reliability are noted.
N. A. Rybushkin +2 more
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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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