114 articole găsite pentru „magneti”.
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EFFECTS OF POWER LINE OPERATING CONDITIONS ON NEARBY GAS PIPELINES
Lecturer Eng. Denisa STET PhD, Assoc. Prof. PhD. Eng. Dan D. MICU, Eng. Levente CZUMBIL PhD Student, Eng. Liviu ANCAS
Obiectivul lucrarii consta in evaluarea tensiunilor induse intr-o retea de doua conducte subterane de transport a gazelor naturale, care impart un coridor de distributie comun cu o linie electrica aeriana de inalta tensiune (LEA-IT), cu scopul de a determin…
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PERMANENT MAGNET TRANSVERSE FLUX MOTOR (PMTFM) FOR A SHIP PROPULSION DRIVE SYSTEM
Emil PADURARIU, Ioan Adrian VIOREL, Kay HAMEYER (Germania), Liviu SOMESAN
Motorul cu magneti permanenti si flux transversal (PMTFM) comparativ cu motoarele electrice conventionale este caracterizat printr-o densitate de putere mare si constructie modulara specifica. PMTFM de obicei, are o constructie complicata, este un adevarat m…
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EXTERNAL ROTOR SHAPE ESTIMATION OF AN INDUCTION MOTOR BY FEM ANALYSIS
Ana-Maria MIHAI, Alecsandru SIMION, Leonard LIVADARU, Adrian MUNTEANU, Ana-Maria MIHAI, Sorin VLASCEANU
Optimizarea unui motor electric pentru a fi utilizat intr-o alta aplicatie decat pentru cea care a fost initial proiectat, implica cunoasterea in totalitate a structurii circuitului electric cat si magnetic. Aceasta lucrare prezinta o analiza comparativa a fo…
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P M TUBULAR LINEAR SYNCHRONOUS GENERATOR FOR WAVE ENERGY CONVERSION
Adrian MUNTEANU, Alecsandru SIMION, Leonard LIVADARU, Adrian MALANCIUC
Lucrarea de fata prezinta un generator sincron cu magneti permanenti de tip tubular cu deplasare liniara pentru exploatarea energiei valurilor. Modelul propus este studiat prin realizarea unor simulari 3D cu ajutorul MEF. Rezultatele preliminare obtinute sunt…
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STUDY OF A 3 PHASE (6/4) SWITCHED RELUCTANCE MOTOR CONTROL
Nicolae-Daniel IRIMIA, Alecsandru SIMION, Leonard LIVADARU, Sorin VLASCEANU, Ovidiu DABIJA, Ana-Maria MIHAI
Controlul masinilor cu reluctanta variabila a cunoscut un interes din ce in ce mai crescut in ultima perioada, ca urmare a avantajelor si a diferitelor posibilitati de utilizare pe care le ofera aceste categorii de masini electrice. In lucrarea de fata este …
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DIELECTRIC PROPERTIES CHARACTERISATION AND 3D VISUALIZATION OF NANO-CONDUCTIVE COMPOSITE
Maria URSAN, George-Andrei URSAN
In aceasta lucrare este prezentat un material nanocompozit sub forma de film, format din polisulfona si magnetita 5%. Acestui material i-au fost analizate proprietatile dielectrice (constanta dielectrica, factorul de pierderi dielectrice, tangenta unghiului …
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SIMULAREA NUMERICA 3D A REGIMULUI TERMIC CORESPUNZATOR FIRULUI DE CONTACT AL SUSPENSIEI CATENARE
Ing. Constantin-Florin OCOLEANU, Prof. dr. ing. Gheorghe MANOLEA, Ing. Iulian ENACHE
In lucrarea de fata sunt prezentate rezultatele simularii numerice 3D a regimului termic stationar corespunzator firului de contact al suspensiei catenare. Firul de contact utilizat este de tip TF 100, sectiune 100 mm2, folosit in sistemele de tractiune ele…
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A SOCIO-ECONOMIC REGULARITY ESTABLISHED BASED ON AN ANALOGY WITH THERMODYNAMIC PROCESSES WITH FINITE SPEED - An Equation for Standard of Living -
Ioan GANEA, Adrian S. PETRESCU, Liliana TIMOFAN , Stoian PETRESCU, Monica COSTEA
This paper proposes a quantitative description of the flows of energy, mass and information in a country, based on recently developed concepts in Thermodynamics with Finite Speed. An equation for Standard of Living is derived. As shown in the ‘70 by Georgescu…
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INTERNAL RESONANT TRANSFORMER WITH DISTRIBUTED OPEN MAGNETIC CORE
Andrei MARINESCU, Aurelia SCORNEA, Ionel DUMBRAVA
The on-site dielectric tests on cables and high power electric machines requires the achievement of some medium voltage testing facilities with reduced dimensions and weights, allowing the compensation of the important reactive energy required by the own capa…
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MAGNETIC CHARACTERISTICS OF NON-ORIENTED SILICON IRON STRIPS OBTAINED THROUGH MECHANICAL, LASER, ELECTRICAL DISCHARGE AND WATER JET CUTTING TECHNOLOGIES
Horia GAVRILĂ, Veronica MĂNESCU (PĂLTÂNEA), Gheorghe PĂLTÂNEA, Gheorghe SCUTARU, Ioan PETER
The increase of the asynchronous motors efficiency may be usually made by decreasing the total energy losses in the magnetic circuits. Non-oriented silicon iron (NO Fe-Si) sheets are soft magnetic materials with a nearly isotropic grain texture. They are used…
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MÖSSBAUER EFFECT INVESTIGATION OF FE-C STEEL ELECTROLYTIC GALVANISATION
Ion BIBICU, Caius BULEA, Vasile RUS
Galvanizing is a very well known industrial process for anticorrosive and protection coatings. At first sight, galvanizing should not need any further important research and development involvement but many reasons contradict this appreciation: the constant e…
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Aprecieri si comparatii intre sistemul clasic roata-sina si sistemul prin sustentatie magnetica la vehiculele feroviare
Ion COPACI, Aurelia TANASOIU
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On the use of magnetic fluids in solar energy installations
Ioan Luminosu, Coleta De Sabata, Aldo De Sabata, Traian Jurca
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Impactul câmpului electromagnetic din statia electrica 400/220 kV Rosiori din cadrul C.N. Transelectrica S.A. Starea de sanatate a personalului - aspect important al sistemului electroenergetic românesc
Nicolae Daniel Fîta