Results 31 to 40 of about 7,207,987 (296)

Voltage harmonic reduction for randomly time-varying source characteristics and voltage harmonics [PDF]

open access: yes, 2006
This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of Brunel University's products or services. Internal or personal use of this material is permitted.
Zobaa, AF
core   +1 more source

Investigations of power quality problems in modern buildings [PDF]

open access: yes, 2011
This thesis was submitted for the degree of Master of Philosophy and awarded by Brunel University.This thesis presents the results of measurements made in a typical office building (Tower A) and a Residential building (Kilmorey Hall), all located in the ...
Olatoke, Abraham
core   +7 more sources

Study the Effect of Serial Inductance on Reducing the Current Harmonic Distortion of Three-Phase Bridge Rectifier

open access: yesTikrit Journal of Engineering Sciences, 2018
The aim of this paper is to analyze the influence of adding serial inductance in AC side of the ‎‎3ph -6 pulse bridge rectifier on the reduction of harmonic distortion rate. A simulated model ‎with serial inductance was analyzed.
Ghanim Thiab Hasan   +2 more
doaj   +1 more source

Model-Based Spatial Harmonics Vector Compensation Method for Three-Phase Mutually Coupled Switched Reluctance Machine With Sinusoidal Current Excitation

open access: yesIEEE Open Journal of Power Electronics, 2020
This paper presents a spatial harmonics compensation method for mutually coupled switched reluctance machines (MCSRMs) with sinusoidal current excitation. The regulation by linear controllers to achieve sinusoidal currents in MCSRMs is challenging due to
Peter Azer   +2 more
doaj   +1 more source

Influence of Travelling Current Linkage Harmonics on Inductance Variation, Torque Ripple and Sensorless Capability of Tooth-Coil Permanent-Magnet Synchronous Machines [PDF]

open access: yes, 2014
This paper introduces an important source of torque ripple in PMSMs with tooth-coil windings (TC-PMSMs). It is theoretically proven that saturation and cross-saturation phenomena caused by the non-synchronous harmonics of the stator current linkage cause
Petrov, Ilya   +2 more
core   +1 more source

Testing Sensitivity of A-Type Residual Current Devices to Earth Fault Currents with Harmonics

open access: yesSensors, 2020
In many applications, modern current-using equipment utilizes power electronic converters to control the consumed power and to adjust the motor speed. Such equipment is used both in industrial and domestic installations.
Stanislaw Czapp
doaj   +1 more source

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

open access: yesAdvanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal   +2 more
wiley   +1 more source

Current Harmonic Suppression for Dual Three-Phase Permanent Magnet Synchronous Motor Drives

open access: yesIEEE Access, 2019
Due to motor asymmetry and system nonlinear factors, the dual three-phase permanent magnet synchronous motor (PMSM) drives produce a large number of current harmonics during operation. Based on the Vector Space Decoupling model, the six-phase currents of
Zhihuang Ruan, Wenxiang Song, Yan Yan
doaj   +1 more source

Is an Apple an Orange? A Large Language Model Benchmark for Candidate Term Extraction and Subclass Decisions Against Upper Ontologies in Engineering and Materials Science

open access: yesAdvanced Engineering Materials, EarlyView.
Building machine‐readable vocabularies for materials science is slow, expert‐driven work. This study benchmarks 13 large language models on two of its first steps: finding candidate terms in engineering articles and deciding where they belong in a class hierarchy.
Thomas Bjarsch   +3 more
wiley   +1 more source

The Impact of an Overlaid Ripple Current on Battery Aging: The Development of the SiCWell Dataset

open access: yesBatteries, 2022
Fast-switching semiconductors induce ripple currents on the high-voltage DC bus in the electric vehicle (EV). This paper describes the methods used in the project SiCWell and a new approach to investigate the influence of these overlaid ripples on the ...
Erik Goldammer   +7 more
doaj   +1 more source

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