Results 61 to 70 of about 8,400 (309)

An Improved PLL-Based Speed Estimation Method for Induction Motors through Harmonic Separation

open access: yesEnergies, 2022
The real-time speed estimation of induction motors (IMs) is important for the motors’ state monitoring and control. The utilization of rotor slot harmonics (RSHs) due to the inherent cogging effect is regarded as a promising way to realize the speed ...
Jie Yu, Youjun Zhang, Xiaoqin Zheng
doaj   +1 more source

Flux Weakening Strategy Optimization for Five-Phase PM Machine with Concentrated Windings [PDF]

open access: yes, 2012
The paper applies an Efficient Global Optimization method (EGO) to improve the efficiency, in flux weakening region, of a given 5-phase Permanent Magnet (PM) machine. An optimal control for the four independent currents is thus defined.
ASLAN, Bassel   +3 more
core   +4 more sources

Identification of a 7-phase claw-pole starter-alternator for a micro-hybrid automotive application [PDF]

open access: yes, 2008
This paper deals with the identification of a new high power starter-alternator system, using both: a Finite Element Method (FEM) modeling and an experimental vector control.
BOUSCAYROL, Alain   +6 more
core   +6 more sources

Electrochemical Behavior of Flame‐Sprayed Sc‐Doped AlCoCrFeMo High‐Entropy Alloy Coatings in 3.5% Sodium Chloride Solution

open access: yesAdvanced Engineering Materials, EarlyView.
Scandium (Sc)‐doped AlCoCrFeMo HEA coatings are fabricated via flame spraying with 0.1, 0.3, and 0.5 wt% Sc additions. Among these, the HEA‐Sc0.3 coating exhibits the highest corrosion resistance, indicated by a more positive corrosion potential and lower current density.
Pankaj Kumar   +7 more
wiley   +1 more source

Adaptive Online Extraction Method of Slot Harmonics for Multiphase Induction Motor

open access: yesEnergies, 2022
The accurate extraction and analysis of slot harmonics caused by slotting in an induction motor are important for the motor’s performance evaluation and state monitoring.
Jie Yu   +3 more
doaj   +1 more source

An Integral Battery Charger with Power Factor Correction for Electric Scooter [PDF]

open access: yes, 2009
This paper presents an integral battery charger for an electric scooter with high voltage batteries and interior-permanent-magnet motor traction drive.
Armando, Eric Giacomo   +2 more
core   +2 more sources

Auto‐Generated Valence States in Electrocatalysts for Boosting Oxygen and Hydrogen Evolution Kinetics in Alkaline Water/Alkaline Seawater/Simulated Seawater/Natural Seawater

open access: yesAdvanced Functional Materials, EarlyView.
This review systematically highlights the latest achievements in mixed‐valence states relevant to hydrogen and oxygen evolution reactions, providing essential insights into future directions and methods for large‐scale practical implementation. This critical review is expected to provide an overview of recent advancements in diverse valence‐state metal
Jitendra N. Tiwari   +4 more
wiley   +1 more source

ОСНОВНІ ТЕНДЕНЦІЇ РОЗВИТКУ ВЕНТИЛЬНО-ІНДУКТОРНИХ ДВИГУНІВ ДЛЯ КОМЕРЦІЙНИХ БПЛА

open access: yesПраці Інституту електродинаміки Національної академії наук України
The article provides an overview of the design features, advantages, and disadvantages of motors used for commercial unmanned aerial vehicles. A review and analysis of multiphase classical SRMs is presented.
О.В. Бібік
doaj   +1 more source

Bio‐Inspired Molecular Events in Poly(Ionic Liquids)

open access: yesAdvanced Functional Materials, EarlyView.
Originating from dipolar and polar inter‐ and intra‐chain interactions of the building blocks, the topologies and morphologies of poly(ionic liquids) (PIL) govern their nano‐ and micro‐processibility. Modulating the interactions of cation‐anion pairs with aliphatic dipolar components enables the tunability of properties, facilitated by “bottom‐up ...
Jiahui Liu, Marek W. Urban
wiley   +1 more source

Bearing Current and Shaft Voltage in Electrical Machines: A Comprehensive Research Review

open access: yesMachines, 2023
The reliability assessment of electric machines plays a very critical role in today’s engineering world. The reliability assessment requires a good understanding of electric motors and their root causes.
Kotb B. Tawfiq   +2 more
doaj   +1 more source

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