Results 41 to 50 of about 1,734,199 (244)

Natural turbulence electrical power generator [PDF]

open access: yes, 1980
An energy conversion apparatus is disclosed in which a stator, fixed to a watertight housing, is coupled to a rotor by a helical spring which suspends the rotor from the housing. Natural turbulence of a fluid, such as water or air, causes acceleration of
Grana, D. C., Wilem, R. T.
core   +1 more source

Optimization of the switched-reluctance motor active part by the Nelder-Mead method

open access: yesИзвестия Томского политехнического университета: Инжиниринг георесурсов, 2016
The relevance of the work relates to an important practical problem for oil industry, such as improving the efficiency of oil extraction, the reliability of equipment and reduction of operating costs.
Alexander Dmitrievich Petrushin   +2 more
doaj   +2 more sources

Application of Advanced Vibration Monitoring Systems and Long Short-Term Memory Networks for Brushless DC Motor Stator Fault Monitoring and Classification

open access: yesEnergies, 2020
In this research, electric motors faults and their identification is reviewed. Brushless direct-current (BLDC) motors stator fault identification using long short-term memory neural networks were analyzed.
Tomas Zimnickas   +4 more
doaj   +1 more source

A novel dual-stator hybrid excited synchronous wind generator [PDF]

open access: yes, 2009
This paper presents a novel dual-stator hybrid excited synchronous wind generator and describes its structural features and operation principle. The no-load magnetic fields with different field currents are computed by 3-D finite-element method.
Chengfeng, Y.   +5 more
core   +1 more source

Optimization of Geometric Characteristics of Cycloidal Profiles of Gerotor Hydraulic Machines

open access: yesAdvanced Engineering Research, 2023
Introduction. The performance and reliability of gerotor hydraulic machines depend on the geometry of the cycloidal gearing  profile.  The  existing  methods  of  calculating  and  optimizing  the  profile  parameters  are  cumbersome,  multicriteria and
S. O. Kireev   +2 more
doaj   +1 more source

Structure and Function of the Bi-Directional Bacterial Flagellar Motor

open access: yesBiomolecules, 2014
The bacterial flagellum is a locomotive organelle that propels the bacterial cell body in liquid environments. The flagellum is a supramolecular complex composed of about 30 different proteins and consists of at least three parts: a rotary motor, a ...
Yusuke V. Morimoto, Tohru Minamino
doaj   +1 more source

Diagnosis of Inter-Turn Short Circuit for a Polyphase Induction Motor in Closed-Loop Vector-Controlled Drives [PDF]

open access: yes, 2007
The main objective of this paper is to develop and experimentally verify a new technique to detect an inter-turn short circuit in one phase of a stator winding of an induction motor energized from a vector-controlled drive.
Demerdash, Nabeel   +2 more
core   +2 more sources

Magnetic noise reduction of in-wheel permanent magnet synchronous motors for light-duty electric vehicles [PDF]

open access: yes, 2020
This paper presents study of a multi-slice subdomain model (MS-SDM) for persistent low-frequency sound, in a wheel hub-mounted permanent magnet synchronous motor (WHM-PMSM) with a fractional-slot non-overlapping concentrated winding for a light-duty ...
Asef, Pedram   +2 more
core   +1 more source

An Investigation on Stator Copper Loss by Using Different Stator Slot Size [PDF]

open access: yesInternational Journal of Information and Electronics Engineering, 2013
The input power to an induction motor is in the form of three phase electric voltages and currents. The first losses encountered in the machine are I2R losses in the stator winding. The stator copper loss occurs when the stator windings is energized. This can be reducing by increasing the stator slot size.
I. Daut   +3 more
openaire   +1 more source

Symmetric Resonance Mechanism for Elimination of Parasitic Torque of a Permanent Magnet Generator under Stable Load

open access: yesИзвестия высших учебных заведений и энергетических объединенний СНГ: Энергетика, 2022
Vibration and torque ripple of the permanent magnet generator axis cause excessive wearing up of the generator, noise, efficiency reduction. The article theoretically considers the possibility of eliminating the oscillation of the rotation torque of the ...
K. V. Dobrego, I. A. Koznacheev
doaj   +1 more source

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