Results 21 to 30 of about 53,368 (296)

Thermodynamic study of a synthetic analog of the famatinite mineral - Cu3SbS4

open access: yesФізика і хімія твердого тіла, 2021
Fundamental thermodynamic properties of the synthetic analog of the famatinite mineral - Cu3SbS4 were studied on the basis of electromotive force (EMF) measurements.
P.R. Mammadli   +3 more
doaj   +1 more source

Activity measurement of Ga in liquid Ga-Pb alloys by EMF method with zirconia solid electrolyte [PDF]

open access: yesJournal of Mining and Metallurgy. Section B: Metallurgy, 2002
EMF measurement of the electrochemical cell with zirconia as solid electrolyte was performed to determine the gallium activity from 950 to 1150K in the entire composition range of liquid Ga-Pb alloys.
Katayama I.   +5 more
doaj   +1 more source

Research on sensorless control of HSPMSM based on a discrete full-order sliding mode observer

open access: yesEnergy Reports, 2023
To address the inaccuracy of the observed rotor position caused by the large estimated back-electromotive force harmonics of the high-speed permanent magnet synchronous motor (HSPMSM) under the conventional sliding mode observer, this paper presents an ...
Shengwen Fan   +3 more
doaj   +1 more source

Influence of machine topology and cross-coupling magnetic saturation on rotor position estimation accuracy in extended back-EMF based sensorless PM brushless AC drives [PDF]

open access: yes, 2007
The influence of the machine topology and dq-axis cross-coupling on the rotor position estimation error in an extended back-EMF based sensorless brushless AC drive is investigated by both finite element analysis and experimentally on four brushless AC ...
Bingham, Chris   +4 more
core   +1 more source

Sensorless flux-weakening control of permanent-magnet brushless machines using third harmonic back EMF [PDF]

open access: yes, 2004
The sensorless control of brushless machines by detecting the third harmonic back electromotive force is a relatively simple and potentially low-cost technique.
Howe, D., Shen, J.X., Zhu, Z.Q.
core   +1 more source

Thermodynamic investigation of the Bi2Se3–Bi2Te3 system by the EMF method

open access: yesКонденсированные среды и межфазные границы, 2020
Binary and complex chalcogenides with a tetradimite-like layered structure are of great practical interest as topological insulators, thermoelectric, and optoelectronic materials.
Gunel S. Hasanova   +3 more
doaj   +1 more source

An idiographic approach to Idiopathic Environmental Intolerance attributed to Electromagnetic Fields (IEI-EMF) Part II. Ecological momentary assessment of three individuals with severe IEI-EMF

open access: yesHeliyon, 2022
IEI-EMF refers to a self-reported sensitivity characterized by attribution of non-specific physical symptoms to exposure to weak EMFs. The majority of empirical results do not support the existence of a causal relationship between EMF and IEI-EMF ...
Zsuzsanna Dömötör   +6 more
doaj   +1 more source

Improved rotor position estimation in extended back-EMF based sensorless PM brushless AC drives with magnetic saliency [PDF]

open access: yes, 2007
An improved extended back-EMF based sensorless control method is proposed for a brushless AC motor equipped with an interior permanent magnet rotor. It accounts for dq-axis cross-coupling magnetic saturation by introducing an apparent mutual winding ...
Bingham, Chris, Howe, D, Li, Y, Zhu, Z Q
core   +1 more source

Technogenic electromagnetic impact zones of electric grid facilities

open access: yesMATEC Web of Conferences, 2018
Introduction of technogenic physical fields including electromagnetic fields (EMF) to the environment can have an adverse impact on both humans and environment.
Bryukhan Fedor, Amirkhanyan Mariya
doaj   +1 more source

Torque Ripple Reduction Method in a Multiphase PM Machine for No-Fault and Open-Circuit Fault-Tolerant Conditions

open access: yesEnergies, 2021
This paper presents a method that has been developed to reduce the torque ripples under healthy and open-circuit fault-tolerant (OCFT) conditions for a multiphase permanent magnet (PM) machine.
Ali Akay, Paul Lefley
doaj   +1 more source

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