Arhive zilnice: mai 28, 2018

34-10 GENERATOARE CU MAGNEȚI PERMANENȚI PENTRU AGREGATE EOLIENE ȘI HIDRAULICE

Această intrare a fost publicată în 2018 Volumul 34 și etichetată Cristian Paul CHIONCEL Elisabeta SPUNEI Nicoleta GILLICH Petru CHIONCEL la de

PERMANENT MAGNETS GENERATORS FOR
WIND AND WATER PLANTS
This paper presents some particularities in the construction of synchronous generators for wind and hydro-plants and low power generators with permanent magnets with a simplified construction. Also, a comparison between variants of generators with electromagnetic excitation and permanent magnets is done.
The advantages of the use of supermagnete from rare earths, Neodim Iron Bor (NeFeB), especially the increase of the efficiency of these generators, are highlighted, and finally the maximization of efficiency is mentioned by replacing the conductive materials (copper, aluminium) with superconducting ceramic materials at ambient temperature.
Keywords: wind power, electrical generators, supermagnete
Cuvinte cheie: energie eoliană, generatoare electrice, supermagnet

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34-9 STUDIU PRIVIND REALIZAREA PRACTICĂ A UNUI AMPLIFICATOR AUDIO DE PUTERE – Partea a II-a

Această intrare a fost publicată în 2018 Volumul 34 și etichetată Eugen RĂDUCA Luminița BARBONI Mariana FILIP Mihaela MOLNAR la de

STUDY REGARDING THE SELF-CONSTRUCTION
OF AN AUDIO POWER AMPLIFIER – Part II
In this paper, beside the amplifiers concepts, the self-construction of the audio power amplifier (2 x 100 W) – UEMR, power amplifier with all its components (housing, supply block, tone corrector, mixing inputs, rectifier stage, preamplifier stages, output stages) respective the putting into operation, the advantages and disadvantages of the amplifier as well as the main conclusions are presented.
Cuvinte cheie: studiu, realizare practică, amplificator audio de putere
Keywords: study, self-construction, audio power amplifier

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34-8 STUDIU PRIVIND REALIZAREA PRACTICĂ A UNUI AMPLIFICATOR AUDIO DE PUTERE – Partea I

Această intrare a fost publicată în 2018 Volumul 34 și etichetată Alexandru SZUCS Lidia NEDELONI Luminița BARBONI Marian-Dumitru NEDELONI la de

STUDY REGARDING THE SELF-CONSTRUCTION
OF AN AUDIO POWER AMPLIFIER – Part I
This paper presents a study regarding the self-construction of an audio power amplifier, where beside the theoretical part regarding the electronic devices and electronic circuits, the motivation of research was mentioned, some current and future trends in power amplifiers were describes respectively, the initial model of the studied amplifier as well the 3D modeling of the audio power amplifier (2 x 100 W) were presented.
Cuvinte cheie: studiu, realizare practică, amplificator audio de putere
Keywords: study, self-construction, audio power amplifier

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34-7 PRIZA DE PAMÂNT ARTIFICIALĂ PE CONTUR POLIGONAL ÎNCHIS LA INSTALAȚIA ELECTRICĂ PENTRU CONSTRUCȚIILE NOI

Această intrare a fost publicată în 2018 Volumul 34 și etichetată Ştefan PAVEL la de

ARTIFICIAL GROUND CONNECTION ON CLOSED POLYGONAL CONTOUR AT THE ELECTRICAL INSTALLATION FOR NEW CONSTRUCTIONS
The resistance of ground connection depends on two important elements, namely the nature of the ground in which it is mounted and the method of installation.
Keywords: ground connection, horizontal electrode, strip form
Cuvinte cheie: priza de pământ, electrod orizontal, platbandă

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34-6 PIERDERILE PE LINIA DE ALIMENTARE A UNUI CONSUMATOR TRIFAZAT LEGAT ÎN TRIUNGHI

Această intrare a fost publicată în 2018 Volumul 34 și etichetată Vasile Mircea POPA la de

THE SUPPLY LINE LOSS OF A THREE-PHASE LOAD IN DELTA CONNECTION
The electrical power system usually operated in a symmetrical three-phase steady state mode. But, there are certain situations that can cause non-symmetrical operations. The presence of the unbalanced three-phased loads induce the apparition of the non-symmetrical systems involving currents and voltages as well the extra-loss within the supply wire. In this work we present a mathematical proof in Mathcad of additional losses in the electrical energy transmission line working under non-symmetrical conditions. Was considered a simplified model in delta connection, but the obtained result generalizes to complex electrical circuits. Finally, we show the conclusions and references.
Keywords: three-phase load, delta connection, active power, electrical energy transmission line, supply line loss, unbalanced functioning regime, mathematical proof in the Mathcad of additional losses under unbalanced conditions
Cuvinte cheie: receptor trifazat, conexiune în triunghi, putere activă, linie de transport a energiei electrice, pierderi pe linia de alimentare, regim dezechilibrat de funcţionare, demonstraţie matematică în mediul Mathcad a pierderilor suplimentare în regim dezechilibrat

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34-5 CONSIDERAȚII ASUPRA CALCULULUI TERMOTEHNIC AL UNEI CLĂDIRI ÎN VEDEREA ELABORĂRII CERTIFICATULUI ENERGETIC Partea a II-a

Această intrare a fost publicată în 2018 Volumul 34 și etichetată Ioan Aurel CHERECHEŞ Ioan VIDICAN Mircea BEJAN la de

CONSIDERATIONS ON THERMOTHETICAL CALCULATION
OF A BUILDING FOR ELABORATION – ENERGY CERTIFICATE – II
In this paper some references are made to the thermo-technical calculation of residential buildings and apartments. Calculations also provide information on the total annual specific energy consumption for heating, lighting, hot water, ventilation, whereby the building falls into an energy class, and then measures are taken to improve the thermal energy performance of building.
Keywords: building, apartment, heat, electricity, thermal ventilation
Cuvinte cheie:clădire, apartament, căldură, electricitate, ventilație termică

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34-4 CONSIDERAȚII ASUPRA CALCULULUI TERMOTEHNIC AL UNEI CLĂDIRI ÎN VEDEREA ELABORĂRII CERTIFICATULUI ENERGETIC Partea I-a

Această intrare a fost publicată în 2018 Volumul 34 și etichetată Ioan Aurel CHERECHEŞ Ioan VIDICAN Mircea BEJAN la de

CONSIDERATIONS ON THERMOTHETICAL CALCULATION
OF A BUILDING FOR ELABORATION – ENERGY CERTIFICATE – I
In this paper some references are made to the thermo-technical calculation of residential buildings and apartments. Calculations also provide information on the total annual specific energy consumption for heating, lighting, hot water, ventilation, whereby the building falls into an energy class, and then measures are taken to improve the thermal energy performance of building.
Keywords: building, apartment, heat, electricity, thermal ventilation
Cuvinte cheie:clădire, apartament, căldură, electricitate, ventilație termică

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34-3 CALCULUL PARAMETRILOR UNUI MOTOR DE INDUCȚIE LA DIFERITE VALORI ALE SARCINII, FOLOSIND PROGRAME DE TIPUL ”IND”

Această intrare a fost publicată în 2018 Volumul 34 și etichetată Gheorghe VERTAN Lucian-Corneliu OCOLIŞAN Sebastian – Mihai IANCU la de

CALCULATION OF PARAMETERS OF AN INDUCTION MOTOR AT DIFFERENT VALUES OF LOAD, USING PROGRAMS SUCH AS „IND”
The paper presents IT and general aspects of how to calculate the parameters of an induction engine (MI) with „IND” type programs in the classic versions of Windows 2010/2015 and new modern versions, original Linux 2017/2018. The latest ones are based on native C language, with maximum compatibility and portability and, moreover, they are automatically plotting the features (MI); the equivalent executable binary code and global computing time are reduced (55 % and 99,99 %) including automatic graphic representation and export to 2 disk formats („.FIG” and MATLAB .png).
Keywords: induction machines, IND program, refurbishment, software, simulation modelling, MATLAB, Simulink, C, f2c, virtual machine
Cuvinte cheie: mașini de inducție, programul IND, retehnologizare, software, modelare simulare, MATLAB, Simulink, C, f2c, mașină virtuală

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34-2 ASPECTE IT PRIVIND MODUL DE CALCUL ȘI ANALIZĂ A PERFORMANȚELOR MAȘINILOR ELECTRICE DE INDUCȚIE UTILIZÂND PROGRAME DE TIP „IND”

Această intrare a fost publicată în 2018 Volumul 34 și etichetată Gheorghe VERTAN Lucian-Corneliu OCOLIŞAN Sebastian – Mihai IANCU la de

IT ISSUES CONCERNING CALCULATION AND ANALYSIS
OF THE PERFORMANCE OF ELECTRICAL MACHINERY USING INDUCTION PROGRAMS ”IND”
The paper presents IT and general aspects of the optimal calculation and specific analysis of the performance of induction electric machines (MI) with IND programs in the classic versions of Windows 2010/2015 and new modern versions, original Linux 2017/2018. The latest ones are based on native C language, with maximum compatibility and portability and, moreover, they are automatically plotting the features (MI); the equivalent executable binary code and global computing time are reduced (with 55 % and 27 %) including automatic graphic representation and export to 2 disk formats („.FIG” and MATLAB ”.png”).
Keywords: induction machines, IND program, upgrading, software, simulation modelling, MATLAB, Simulink, FORTRAN’77, C
Cuvinte cheie: mașini de inducție, program IND, retehnologizare, software, modelare simulare, MATLAB, Simulink, FORTRAN’77, C

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34-1 ANALIZĂ EMPIRICĂ A IMPACTULUI FABRICAȚIEI CU SISTEME IOT ASUPRA INDUSTRY 4.0

Această intrare a fost publicată în 2018 Volumul 34 și etichetată Elisabeta Mihaela CIORTEA la de

EMPIRICAL ANALYSIS OF THE IMPACT OF MANUFACTURING WITH IOT SYSTEMS ON INDUSTRY 4.0
This paper presents a summary of the impact of manufacturing using IoT systems on Industry 4.0. They are theoretically presenting the programming model using JavaScript. The IoT concept should be used to facilitate the infrastructure, so every object must be represented on the Internet and interact with others. Communication within the network can take place between elements at the same conceptual level via an interface.
Keywords: IoT, fabrication, Petri networks
Cuvinte cheie: IoT, fabricatie, rețele Petri

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33-62 CERCETAREA IMPLEMENTĂRII LA BORDUL AUTOVEHICULELOR MERCEDES E CLASS COUPE A INFORMAȚIILOR ESENȚIALE PRIVITOARE LA ECONOMICITATEA DE COMBUSTIBIL ÎN EXPLOATARE

Această intrare a fost publicată în 2018 Volumul 33 și etichetată Doru Laurean BĂLDEAN Septimiu JOVREA la de

RESEARCHING THE IMPLEMENTATION AT ON-BOARD LEVEL OF MERCEDES E CLASS COUPE VEHICLES OF ESENTIAL INFORMATIONS CONCERNING
FUEL-ECONOMY IN OPERATION
The present scientific research develops a practical endeavor on the infotainment packages presented through graphical images and numerical data at on-board level in Mercedes E Class Coupe as a modern solution for vehicles. Analyzing the existing technological solution available on the upper level class of luxury cars may be facilitated improvement and optimization in the whole automotive sector.
Today automotive products are studied in order to improve their evolution and performance from state of the art to a better adapted version in the future production. That determines the designers and the researchers to combine all knowledge available in the science and data transfer.
The significance of researching the dash-board graphical representations is based on the necessity of adequate optimization of important data presentation and infotainment, which is handy for the occupants on board.
Keywords: Benz, dash-board, data, fuel economy, Mercedes E
Cuvinte cheie: Benz, bord, date, economie de combustibil, Mercedes E

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33-61 CERCETĂRI PRIVIND IMPACTUL VITEZEI DE CIRCULAȚIE ȘI A TRECERILOR DE PIETONI ASUPRA CONGENTIEI TRAFICULUI RUTIER. STUDIU DE CAZ B-DUL MIHAI VITEAZUL, SIBIU

Această intrare a fost publicată în 2018 Volumul 33 și etichetată Marinela INŢĂ la de

RESEARCH ON THE IMPACT OF SPEED AND PEDESTRIAN CROSSING ON THE ROAD TRAFFIC CONGENTION. CASE STUDY- MIHAI VITEAZUL BVD, SIBIU
The speed is a significant constraint in terms of traffic, because it is directly related to safety, time, convenience and economical aspect for any type of road. Pedestrian crossings are a major concern for road safety as pedestrians are the most vulnerable road users, especially when they are involved in an accident. The paper aims to analyse the traffic velocity and queues on Mihai Viteazul Bvd., where, due to intensive traffic and the existence of ten crosswalks there are blockages and search solutions for improving circulation. The results of this analysis can be used by decision makers to optimize artery and design ideal pedestrian facilities.
Keywords: traffic volume, speed, pedestrian crossing, queues

Cuvinte cheie: volum trafic, viteză, trecere de pietoni, cozi de așteptare

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33-60 CONTRIBUȚII LA CERCETAREA ȘI DEZVOLTAREA EXPERIMENTALĂ A UNOR METODE AVANSATE DE ANALIZĂ ȘI RAPORTARE A EVENIMENTELOR RUTIERE

Această intrare a fost publicată în 2018 Volumul 33 și etichetată Doru Laurean BĂLDEAN Ioan Aurel CHERECHEŞ la de

CONTRIBUTIONS TO EXPRIMENTAL RESEARCH AND DEVELOPMENT OF SOME ADVANCED METHODS FOR ANALYZE AND REPORT THE ROAD EVENTS
The experimental research and development work searches the significant factors, methods and materials in order to redefine the evaluation, analyze and reporting the car crashes and roads events. Thus in this present paper are considered few aspects of a particular road event that are analyzed with unconventional methods after the crash took place in order to improve on the report. The best way is that an accident never takes place but it is too idealistic due to the intricate structure of real traffic on public roads. So in order to improve the overall safety and awareness the prospective work shows some aspects that by analyze and automation could save time, energy and even life or protect health of living beings. The materials, methodology and result are able to be integrated in data bases and post-used for better understanding and redefining tools in real and virtual crash test technical inspection and analyze.
Keywords: accidents, Dacia Logan, events, road, research
Cuvinte cheie: accidente, Dacia Logan, evenimente, rutiere, cercetare

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33-59 CONTRIBUȚII LA STUDIUL PROCEDURILOR DE OMOLOGARE A UNUI AUTOVEHICUL ELECTRIC ÎN ERA TRANZIȚIEI

Această intrare a fost publicată în 2018 Volumul 33 și etichetată Cristina MOCAN Doru Laurean BĂLDEAN la de

CONTRIBUTIONS TO THE PROCEDURE STUDY OF ELECTRIC VEHICLE HOMOLOGATION IN TRANSITION AGE
In the first stage the objective is to improve traffic and decrease noise and vibrations, but also meanwhile the technological megatrends have directed the research and development towards the grater energy efficiency, higher output, improved road safety and lower waste in human society.
To reach all these significant objectives in electric vehicle development it is mandatory to increase the number of clean and digital controlled systems in the urban area. In the near future stage (in space-time), electrical and smart cars will be fully operational and completelly developed for most common transportation tasks. The standards for type approval in various economies are studied in this paper. The actual research applied to the homologation procedure as well as the data obtained by collecting, centralizing and analyzing all found norms and regulations facilitated the developing of procedures. Homologation process is started as soon as car-development is finished and detailed.
A successful procedure is to be fulfilled when there is a type approval for each component, for each system or part or equipment or assembly before the whole vehicle is put to be type approved at RAROM. The present paper and the specific documents that are refered to in it, may nowadays be considered as a strong basis for developing and initiating the homologation procedure.
Keywords: automotive, electric, power-train, motor, vehicle
Cuvinte cheie: automobilism, electric, moto-propulsie, motor, vehicul

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33-58 STUDIUL NIVELULUI DE IMPLEMENTARE A STAȚIILOR DE ALIMENTARE CU ENERGIE ELECTRICĂ PENTRU AUTOVEHICULE RUTIERE ÎN ZONA METROPOLITANĂ CLUJ-NAPOCA

Această intrare a fost publicată în 2018 Volumul 33 și etichetată Doru Laurean BĂLDEAN la de

THE STUDY OF IMPLEMENTATION LEVEL OF ELECTRIC ENERGY SUPPLY STATIONS FOR AUTOMOTIVE VEHICLES IN METROPOLITAN AREA OF CLUJ-NAPOCA
The present study makes an analysis in the actual level of implementation and operating specs regarding the electrical energy supply stations for automotive fleet in the metropolitan area of Cluj-Napoca. Using all the available material in mentioned area were determined the places specifically built to allow vehicle charging. Also there were estimated the major players in the field at the present moment and for the next five years at least in the region. The importance of monitoring the electricity supply stations and the important players in the field at different levels consists in the fact that these vectors have a great influence on the technic-social movement and automotive marketing trend in the near future, which consequently will further determine the air pollution on one hand and road safety on the other hand. Further improvement and cloning of the electric energy supply stations for road e-vehicles are considered.
Keywords: electricity, energy, supply, stations, transport
Cuvinte cheie: electricitate, energie, furnizare, stații, transport

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33-57 STUDIUL EXPERIMENTAL AL POSIBILITĂȚII SPORIRII EFICIENȚEI ENERGETICE PRIN CONTROLUL FRECĂRII ÎN LAGĂRELE CU ROSTOGOLIRE ALE SISTEMULUI DE RULARE DE LA DACIA SOLENZA

Această intrare a fost publicată în 2018 Volumul 33 și etichetată Adela-Ioana BORZAN Cornel GABRIAN Doru Laurean BĂLDEAN la de

EXPERIMENTAL STUDY OF THE POSSIBILITY OF INCREASING ENERGY EFICIENCY THROUGH THE CONTROL OF FRICTION IN ROLLER BEARINGS
OF THE WHEEL TRAIN FROM DACIA SOLENZA
The present study shows in known technical concepts and methods from experimental testing the problematic aspects concerning the friction in wheel train from Dacia Solenza 1.4 MPI car. After symptoms appearance with noises when cornering at some speeds the diagnostic procedure was applied and the wheel bearings with increased wear level were detected and changed. The worst case scenario is when the wheel bearing is so advanced in degradation than stops the wheel from turning leading to higher damages of the wheel train of the vehicle. Analysing the situation in the present case it was outlined that after some kilometres travelled in various conditions and monitoring the noise emission and type of vibration with decibel meter microphone and stethoscopes rear wheel has problems. The development of present paper shows the simplified procedure of replacing the wheel bearing on vehicle Dacia Solenza. First is a theoretical description of the problematic situation and there are located the wheel bearings in general terms and then there are presented the main components of the wheel train. Finally there is a short description of the simplified method for the wheel bearing exchange on the studied vehicle.
Keywords: Dacia, bearings, friction, efficiency, wheels
Cuvinte cheie: Dacia, rulmenți, frecare, randament, roți

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33-56 STUDIU APLICATIV ASUPRA ETAPELOR TEHNOLOGICE DE REPARARE ȘI ÎNLĂTURARE A UNOR ASPECTE SIMPTOMATICE ÎN CAZUL SISTEMULUI DE FRÂNARE HIDRAULIC DE LA DACIA SOLENZA

Această intrare a fost publicată în 2018 Volumul 33 și etichetată Adela-Ioana BORZAN Cornel GABRIAN Doru Laurean BĂLDEAN Ferenc GÁSPÁR Ioan Aurel CHERECHEŞ la de

APPLIED STUDY ON TECHNOLOGICAL PHASES OF REPAIRING AND PRECLUDING OF SOME SIMPTOMATIC ASPECTS IN THE CASE OF HYDRAULIC BRAKING SYSTEM FROM DACIA SOLENZA
The present applied study highlights, in usual technical terms and strategies from practical expertize, the problematic aspects concerning the brake friction in operating surfaces of drum and brake shoes from Dacia Solenza. After a period of testing, inspecting and diagnosing the noise and operational behavior an applied endeavor was initiated. This was the initiating point for the present experimental study in order to manage the data and to record a contribution to practical experience. The braking system is one of the most important safety systems on the vehicle especially in relation with the steering system. Its performance and predictable operation is the basis of every safe journey and transports of material goods. Occasionally it is going not so well or as expected and during these periods of time it makes the ride unpleasant and unsafe. There is a know-how needed in order to preclude these problematic aspects in operation and to restore the safety level to acceptable. In this paper is synthesized the applied part of brake study and repair process in the case of Dacia Solenza.
Keywords: Dacia, brake, braking-shoes, brake-drum
Cuvinte cheie: Dacia, frână, saboți-frână, tambur

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