Results 51 to 60 of about 14,335,537 (251)

Submodule Capacitor Voltage Ripple Reduction of Full-Bridge Submodule-Based MMC (FBSM-MMC) with Non-Sinusoidal Voltage Injection

open access: yesEnergies, 2023
The full-bridge submodule (FBSM)-based modular multilevel converter (FBSM-MMC) offers promising performance due to its ability to output negative FBSM voltage.
Ming Huang
doaj   +1 more source

Comments on “apparent power - a misleading quantity in the non-sinusoidal power theory: are all non-sinusoidal power theories doomed to fail?”

open access: yes, 1994
It is shown in this comment that recent development in the power theory of systems with non‐sinusoidal waveforms contradicts the conclusions presented in the paper “Apparent Power ‐ a Misleading Quantity in the Non‐Sinusoidal Power Theory: Are all Non ...
L. S. Czarnecki, Czarnecki, L. S.
core   +1 more source

A Novel Approach to Estimate the Transition Temperature via Dynamic Nanoindentation

open access: yesAdvanced Engineering Materials, EarlyView.
A new dynamic nanoindentation‐based method was developed that uses the stiffness ratio as an indicator of the elastic–plastic deformation contributions at different temperatures. The approach successfully identified transition temperatures in ferritic steel and distinguished them from continuously ductile austenitic steel.
Stefan Zeiler   +4 more
wiley   +1 more source

Analysis of non-active power in non-sinusoidal circuits using geometric algebra [PDF]

open access: yes, 2019
A new approach for the definition of non-active power in electrical systems is presented in this paper. Thanks to the use of geometric algebra, it is possible to define a new term called geometric non-active power that is applicable to both sinusoidal ...
Viciana Gámez, Eduardo José   +4 more
core   +1 more source

Effects of Non-Sinusoidal Motion and Effective Angle of Attack on Energy Extraction Performance of a Fully-Activated Flapping Foil

open access: yesJournal of Applied Fluid Mechanics, 2021
Flapping foil energy harvesting systems are considered as highly competitive devices for conventional turbines. Several research projects have already been carried out to improve performances of such new devices. This paper is devoted to study effects of
A. Boudis   +5 more
doaj  

Improved Harmonic Mitigation Using Dual Three-Phase iUPQC [PDF]

open access: yesE3S Web of Conferences
This study simplifies iUPQC administration by employing a dual three-phase design, which makes the methodology behind the study more transparent. By utilising a parallel (shunt) and series active filter, it is possible to limit the amount of harmonics ...
Kumar Y. Anil   +5 more
doaj   +1 more source

Optimal passive filter design for effective utilization of cables and transformers under non-sinusoidal conditions [PDF]

open access: yes, 2014
Transformers and cables have overheating and reduced loading capabilities under non-sinusoidal conditions due to the fact that their losses increases with not only rms value but also frequency of the load current.
Zobaa, AF   +7 more
core   +1 more source

Materials‐Driven Additive Manufacturing for Electrical Machines: Qualification‐Oriented Design Beyond Geometric Freedom

open access: yesAdvanced Engineering Materials, EarlyView.
This perspective reframes additive manufacturing for electrical machines as a qualification‐limited materials and architecture design problem. It links process–structure–property–performance relationships to magnetic, conducting, dielectric, and thermal property windows, highlighting where AM can enable segmented magnetic circuits, permanent magnet ...
Dénes Fodor, Loránd Szabó
wiley   +1 more source

Laser‐Induced Graphene from Waste Almond Shells

open access: yesAdvanced Functional Materials, EarlyView.
Almond shells, an abundant agricultural by‐product, are repurposed to create a fully bioderived almond shell/chitosan composite (ASC) degradable in soil. ASC is converted into laser‐induced graphene (LIG) by laser scribing and proposed as a substrate for transient electronics.
Yulia Steksova   +9 more
wiley   +1 more source

Analysis and Demonstration of Control Scheme for Multiple Operating Modes of Energy Storage Converters to Enhance Power Factor

open access: yesMathematics, 2022
Rectifiers are required by the devices connected to the distribution end of the electrical power networks for AC/DC conversion. The line current becomes non-sinusoidal when a capacitor with a significant value is used to mitigate the output voltage ...
Khalid Javed   +2 more
doaj   +1 more source

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