Results 31 to 40 of about 85,414 (206)
Study on Rotor-Bearing System Vibration of Downhole Turbine Generator under Drill-String Excitation
EnergiesDownhole turbine generators (DHTG) installed within drill-string are susceptible to internal and external excitation during the drilling process, causing significant dynamic loads on bearings, and thereby reducing the bearing’s service life.
Benchun Yao +4 more
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Analysis of Progressively Unbalanced Induction Motor Current Signals Based on Information Entropy
Elektronika ir Elektrotechnika, 2018 The article presents the capabilities of a new fault identification method used for different fault levels. The method allows identifying unbalanced induction motor by only using stator current signals.
Ignas Andrijauskas, Rimas Adaskevicius
doaj +1 more source
From Real to Complex FLL With Unbalance and Harmonic Distortion Compensation
IEEE Access, 2021 This work presents a model-based frequency-locked loop (FLL) for three-phase systems subject to unbalance and harmonic distortion conditions. It is based on a pretty general model of a three-phase AC reference signal comprising a set of harmonic ...
Gerardo Escobar +5 more
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Aerospace, 2022 An aero engine fan rotor is composed of a multi-stage disk and multi-stage blades. Excessive unbalance of the aero engine fan rotor after assembly is the main cause of aero engine vibration.
Huibin Zhang +6 more
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Overview of three-phase inverter topologies for distributed generation purposes [PDF]
, 2010 The increasing presence of single-phase distributed generators and unbalanced loads in the electric power system may lead to unbalance of the three phase voltages, resulting in increased losses and heating.
De Kooning, Jeroen +5 more
core +1 more source
Energies, 2020 Electric railway power systems (ERPS) as one of the most critical and high-power end-user loads of utility grids are characterized by outlandish power quality (PQ) problems all over the world.
Hamed Jafari Kaleybar +4 more
doaj +1 more source
Energies, 2021 The current state of the art shows that unbalance and distortion on the voltage waveforms at the terminals of a grid-connected inverter disturb its output currents.
Israel D. L. Costa +4 more
doaj +1 more source
Noise Figure Measurement of Differential Amplifiers Using non-Ideal Baluns [PDF]
, 2011 This paper analyzes the noise and gain measurement of microwave differential amplifiers using two passive baluns. A general model of the baluns is considered, including potential losses and phase/amplitude unbalances.
García Muñoz, Luis Enrique +3 more
core +2 more sources
Frontiers in Mechanical EngineeringThis article presents experimental results on the algebraic identification of the magnitude and phase angle of unbalance in a rotor-bearing system in a Jeffcott configuration.
Jesús U. Quiroz-Bautista +3 more
doaj +1 more source
Lubricants, 2017 Floating ring bearings are the commonly used type of bearing for automotive turbochargers. The automotive industry continuously investigates how to reduce the bearing friction losses and how to create silent turbochargers.
Rob Eling +3 more
doaj +1 more source