The use of AC Drives in the industry applications has seen tremendous growth over the last 40 years with the rapid development of high-power semiconductors, power converter topology, new control strategies, and their implementation with... more
The use of AC Drives in the industry applications has seen tremendous growth over the last 40 years with the rapid development of high-power semiconductors, power converter topology, new control strategies, and their implementation with the advanced digital processors. These have mode it possible to design drives with higher VA rating, with PWM and VC / DTC. However, this article present a real application in Kronospan S.A. Sebes Romania, where for the first time in Romania a medium voltage static converter was put in function with the load voltage of 6kV. The fast ascension of AC electric drives and static power converters was possible through a continuous and fabulous development of the performances of the semiconductor power devices during the last 50 years. There are two big categories of high power semiconductors: thyristors (which switch currents) where we can include switched rectifiers (SCR), gate-blocked thyristors (GTO), the thyristors with integrated switched gate (ICGT) ...
The paper presents many methods to produce synthetic loading of rotating electric machines (induction, synchronous and DC) without load to the shaft using power converter. The required equipment is simple. Setting-up time is considerably... more
The paper presents many methods to produce synthetic loading of rotating electric machines (induction, synchronous and DC) without load to the shaft using power converter. The required equipment is simple. Setting-up time is considerably reduced because it is not required to connect an external load to the machine's shaft. The range of r.m.s. current control is large beginning from no-load current to overload at rated speed and temperature, that the total losses in the machine can be identified by taking the average of the measured power over one cycle of synthetic loading of the machine.
The needs for life long learning are increased. So, virtual classrooms and virtual joint laboratories are used for individual learning as well for collective ones. These new learning places integrate many technologies and enhance their... more
The needs for life long learning are increased. So, virtual classrooms and virtual joint laboratories are used for individual learning as well for collective ones. These new learning places integrate many technologies and enhance their usability by net-based communication between learning students and connected real devices. Robotics animation and visualization can help student to complex programming robot in virtual and real world. Distributed learning environments that support such learning places enable learners to access a wide range of resources rapidly and economically and allow their active participation in social communities. Lot of experiments has been made with student's access to robotics laboratory equipment though Internet communication. In last decade this education space expanded in Ispace Laboratory Network I. INTRODUCTION The constant development of computers and information technology allows the implementation and application of new methods and systems they had...
In this paper is presented an intelligent approach for mobile robot simulation. One of the basic idea is how to modeling of robot manipulators. It has an expanding area of interest because it can aid the design and usage of robots. We... more
In this paper is presented an intelligent approach for mobile robot simulation. One of the basic idea is how to modeling of robot manipulators. It has an expanding area of interest because it can aid the design and usage of robots. We usually need design and testing of manipulators, robot action planning, on line control of robot manipulators, user interface, and training and education. RoboSim is a very good simulator developed for simulating the interaction, cooperation, and communication among various robots existing in a complex virtual environment. RoboSim is evaluated from 1995 year in very respectable tool. Usually Robosim used to perform simulations of many types of robots for working within a single, virtual environment. It usually provides a better way to develop various robotic applications in different enviroment. This work analysing the performance of Robosim simulator, various design changes applied to the simulator, and the implementation various architecture on the e...
The problem of finding the optimal path for the robot arm is one of the most important problems of industrial robot. Problem consists when robot looking for specific routes that require the lowest power consumption. Path that established... more
The problem of finding the optimal path for the robot arm is one of the most important problems of industrial robot. Problem consists when robot looking for specific routes that require the lowest power consumption. Path that established between any
two end points, can follow many paths. All these paths require different amounts of energy depending on the distance, velocity and acceleration. Path planning for robotic arms have a several degrees of freedom. This problem is solved by using neuro-fuzzy techniques. Using analytical and numerical techniques is very difficult to find a good solution. Mathematically is more
difficulty to move a robotic arm in the presence of obstacles, but child instinctively moving his hand in the presence of obstacles. A way that allows us to progress is a neuro-fuzzy fusion systems. Neural networks make the ability to learn, while Fuzzy logic is based on the emulation of thinking of an expert. In addition, as hardware technology advances, more and more value will be placed on solutions that can be used in parallel processing, such as neural networks and fuzzy logic with neural networks.
two end points, can follow many paths. All these paths require different amounts of energy depending on the distance, velocity and acceleration. Path planning for robotic arms have a several degrees of freedom. This problem is solved by using neuro-fuzzy techniques. Using analytical and numerical techniques is very difficult to find a good solution. Mathematically is more
difficulty to move a robotic arm in the presence of obstacles, but child instinctively moving his hand in the presence of obstacles. A way that allows us to progress is a neuro-fuzzy fusion systems. Neural networks make the ability to learn, while Fuzzy logic is based on the emulation of thinking of an expert. In addition, as hardware technology advances, more and more value will be placed on solutions that can be used in parallel processing, such as neural networks and fuzzy logic with neural networks.
Abstract: - In this paper is analyzing the current operating conditions of one electric arc furnace (EAF) in order to evaluate the best option to solve the energy consumption problem. Experimental results show that EAFs represent a... more
Abstract: - In this paper is analyzing the current operating conditions of one electric arc furnace (EAF) in
order to evaluate the best option to solve the energy consumption problem.
Experimental results show that EAFs represent a substantial source of electric disturbances, such as voltage fluctuations, flicker, harmonics, and unbalance between phases. Improvement of the energetic performances of an EAF imposes a careful technical and economical analysis.
The possible compensation solutions include passive filter, SVC (static var compensator) and STATCOM (static synchronous compensator).
Finally, the guideline for compensator selection and performance estimation is obtained.
Key-Words: - Electric Arc Furnace, Flicker, Power Factor, Harmonic Analysis, Reactive Compensator,
Improvement.
order to evaluate the best option to solve the energy consumption problem.
Experimental results show that EAFs represent a substantial source of electric disturbances, such as voltage fluctuations, flicker, harmonics, and unbalance between phases. Improvement of the energetic performances of an EAF imposes a careful technical and economical analysis.
The possible compensation solutions include passive filter, SVC (static var compensator) and STATCOM (static synchronous compensator).
Finally, the guideline for compensator selection and performance estimation is obtained.
Key-Words: - Electric Arc Furnace, Flicker, Power Factor, Harmonic Analysis, Reactive Compensator,
Improvement.
Research Interests:
Research Interests:
... View colleagues of Gabriel Nicolae Popa. ... 5. Manuela Panoiu , Caius Panoiu , Mihaela Osaci ,Ionel Muscalagiu, Simulation result about harmonics filtering using measurement of some electrical items in electrical installation on UHP... more
... View colleagues of Gabriel Nicolae Popa. ... 5. Manuela Panoiu , Caius Panoiu , Mihaela Osaci ,Ionel Muscalagiu, Simulation result about harmonics filtering using measurement of some electrical items in electrical installation on UHP EAF, WSEAS Transactions on ...
Research Interests:
Research Interests:
Research Interests:
... 7. Gabriel Nicolae Popa , Sorin Deaconu ... 9. Manuela Panoiu , Caius Panoiu , Mihaela Osaci ,Ionel Muscalagiu, Simulation result about harmonics filtering using measurement of some electrical items in electrical installation on UHP... more
... 7. Gabriel Nicolae Popa , Sorin Deaconu ... 9. Manuela Panoiu , Caius Panoiu , Mihaela Osaci ,Ionel Muscalagiu, Simulation result about harmonics filtering using measurement of some electrical items in electrical installation on UHP EAF, WSEAS Transactions on Circuits ...
Research Interests:
Research Interests:
ABSTRACT In the present paper is carried out a theoretical and experimental study of dual stator winding squirrel cage asynchronous generator (DSWA) behavior in the presence of saturation regime (non-sinusoidal) due to the variable speed... more
ABSTRACT In the present paper is carried out a theoretical and experimental study of dual stator winding squirrel cage asynchronous generator (DSWA) behavior in the presence of saturation regime (non-sinusoidal) due to the variable speed operation. The main aims are the determination of the relations of calculating the equivalent parameters of the machine windings to optimal design using a Matlab code. Issue is limited to three phase range of double stator winding cage-induction generator of small sized powers, the most currently used in the small adjustable speed wind or hydro power plants. The tests were carried out using three-phase asynchronous generator having rated power of 6 [kVA].
Research Interests:
Plate-type electrostatic precipitators are the main installations of separating particles from industries (especially for large gas flow) and must operate in its electromagnetic environment without interfering with the operation of other... more
Plate-type electrostatic precipitators are the main installations of separating particles from industries (especially for large gas flow) and must operate in its electromagnetic environment without interfering with the operation of other equipments. The power supplies have non-linear elements that cause distortions of the sources currents. The main objective of this work is to measure, simulate, and analyze, currents, voltages, total harmonic distortion, and powers from the sources that are used (thyristor- controlled reactor type) taking into account a news electric model, more close to reality, of the sections. It’s analyzed the modification of the current waves shape and total harmonic distortion in case of using shunt active filter.
Research Interests:
To optimal control of the dust emission at the precipitators?? output it is important to know the dependency between electrical and technological parameters. For an industrial precipitator were measured the total active (P), reactive (Q)... more
To optimal control of the dust emission at the precipitators?? output it is important to know the dependency between electrical and technological parameters. For an industrial precipitator were measured the total active (P), reactive (Q) and apparent (S) powers of precipitator from one section power supplies, mass-flow rate of steam (M) at the output of boiler, and dust emission (E) at the output of precipitator. To establish a mathematical model of a dependent parameter on other independent parameters, it can use the least squares method, which establishes minimum sum of square deviations for a certain mathematical function. To modeling of above parameters it was used least squares method to evaluate the evolution of dust emission E (dependent variable) depending the other parameters (from electrical power supplies: the active P, reactive Q and apparent S powers, and from the boiler: mass-flow rate of steam M). It was determined the mathematical modeling for E=f(Q,P), E=f(Q,M) with...
In the paper is present power quality measurement analysis of three sections plate-type electrostatic precipitators supplied with traditional d.c. energization with analogical controlled anti parallel thyristors. The control of constant... more
In the paper is present power quality measurement analysis of three sections plate-type electrostatic precipitators supplied with traditional d.c. energization with analogical controlled anti parallel thyristors. The control of constant firing angle of thyristors is set depending on the secondary reference current. Analysis of the measure electrical parameters is done according with power quality standards EN 50160 (for voltage) and IEC 61000-3-4 (for current). The measures were made in two regimes: a long period of time and short period of time.
The paper establishes the necessary connections meant to spot the earth connections and short circuits between the conductors of a power line, using the DC bridges meant for measuring resistances between conductors at the ends of the... more
The paper establishes the necessary connections meant to spot the earth connections and short circuits between the conductors of a power line, using the DC bridges meant for measuring resistances between conductors at the ends of the power line. Since it is a relative method, it imposes an exact knowledge of the faulty power line setting. For values of the resistances measured between the conductors of the power line having over 1Ω at one end, the measurement will be carried out with a Wheatstone bridge, and for values below 1Ω with a Thomson bridge. In order to accurately determine the place of the fault, it measured the distances from the end of the line up to the fault and then we performed a correction calculation for this distance.
Research Interests:
The use of AC Drives in the industry applications has seen tremendous growth over the last 40 years with the rapid development of high-power semiconductors, power converter topology, new control strategies, and their implementation with... more
The use of AC Drives in the industry applications has seen tremendous growth over the last 40 years with the rapid development of high-power semiconductors, power converter topology, new control strategies, and their implementation with the
advanced digital processors. These have mode it possible to design drives with higher VA rating, with PWM and VC / DTC. However, this article present a real application in Kronospan S.A. Sebes Romania, where for the first time in Romania a medium voltage static converter was put in function with the load voltage of 6kV.
advanced digital processors. These have mode it possible to design drives with higher VA rating, with PWM and VC / DTC. However, this article present a real application in Kronospan S.A. Sebes Romania, where for the first time in Romania a medium voltage static converter was put in function with the load voltage of 6kV.
Experimental data collected from different plate-type electrostatic precipitators used in a thermoelectric power plant has been analyzed. The following parameters were considered: the collection efficiency, average migration velocity of... more
Experimental data collected from different plate-type electrostatic precipitators used in a thermoelectric power plant has been analyzed. The following parameters were considered: the collection efficiency, average migration velocity of dust particles, velocity distribution of the gas in the input and output channels of precipitators. The average migration velocity of dust particles can be estimated using various mathematical models, and the gas velocity can be computed using the velocity distributions from the input channels of the precipitators. The traveling time of dust particles between the electrodes is smaller than the traveling time along the precipitator sections.
Research Interests:
This paper presents generic model of hybrid power system consisting in a combined solution one wind turbine with asynchronous generator and on hydro generator with synchronous machine. This technology was developed by to reduce the cost... more
This paper presents generic model of hybrid power system consisting in a combined solution one wind turbine with asynchronous generator and on hydro generator with synchronous machine. This technology was developed by to reduce the cost of supplying electricity in remote communities. The optimal wind penetration (installed wind capacity/peak electrical demand) for this system depends on the site availability of hydro energy and available wind resource. The optimal solution is evaluated first using HOMER – special design software for optimizing cost exploitation for a hybrid power systems. For the optimum solution we analyze the system by means of simulation in order to present the system behavior during normal operation.
Research Interests:
In this paper is presented an intelligent approach for mobile robot simulation. One of the basic idea is how to modeling of robot manipulators. It has an expanding area of interest because it can aid the design and usage of robots. We... more
In this paper is presented an intelligent approach for mobile robot simulation. One of the basic idea is how to modeling of robot manipulators. It has an expanding area of interest because it can aid the design and usage of robots. We usually need design and testing of manipulators, robot action planning, on line control of robot manipulators, user interface, and training and education. RoboSim is a very good simulator developed for simulating the interaction, cooperation, and communication among various robots existing in a complex virtual environment. RoboSim is evaluated from 1995 year in very respectable tool. Usually Robosim used to perform simulations of many types of robots for working within a single, virtual environment. It usually provides a better way to develop various robotic applications in different enviroment. This work analysing the performance of Robosim simulator, various design changes applied to the simulator, and the implementation various architecture on the e...
The paper presents many methods to produce synthetic loading of rotating electric machines (induction, synchronous and DC) without load to the shaft using power converter. The required equipment is simple. Setting-up time is considerably... more
The paper presents many methods to produce synthetic loading of rotating electric machines (induction, synchronous and DC) without load to the shaft using power converter. The required equipment is simple. Setting-up time is considerably reduced because it is not required to connect an external load to the machine's shaft. The range of r.m.s. current control is large beginning from no-load current to overload at rated speed and temperature, that the total losses in the machine can be identified by taking the average of the measured power over one cycle of synthetic loading of the machine.
The needs for life long learning are increased. So, virtual classrooms and virtual joint laboratories are used for individual learning as well for collective ones. These new learning places integrate many technologies and enhance their... more
The needs for life long learning are increased. So, virtual classrooms and virtual joint laboratories are used for individual learning as well for collective ones. These new learning places integrate many technologies and enhance their usability by net-based communication between learning students and connected real devices. Robotics animation and visualization can help student to complex programming robot in virtual and real world. Distributed learning environments that support such learning places enable learners to access a wide range of resources rapidly and economically and allow their active participation in social communities. Lot of experiments has been made with student's access to robotics laboratory equipment though Internet communication. In last decade this education space expanded in Ispace Laboratory Network I. INTRODUCTION The constant development of computers and information technology allows the implementation and application of new methods and systems they had...
In this paper is presented an intelligent approach for mobile robot simulation. One of the basic idea is how to modeling of robot manipulators. It has an expanding area of interest because it can aid the design and usage of robots. We... more
In this paper is presented an intelligent approach for mobile robot simulation. One of the basic idea is how to modeling of robot manipulators. It has an expanding area of interest because it can aid the design and usage of robots. We usually need design and testing of manipulators, robot action planning, on line control of robot manipulators, user interface, and training and education. RoboSim is a very good simulator developed for simulating the interaction, cooperation, and communication among various robots existing in a complex virtual environment. RoboSim is evaluated from 1995 year in very respectable tool. Usually Robosim used to perform simulations of many types of robots for working within a single, virtual environment. It usually provides a better way to develop various robotic applications in different enviroment. This work analysing the performance of Robosim simulator, various design changes applied to the simulator, and the implementation various architecture on the e...
Research Interests:
Research Interests:
Research Interests:
Research Interests:
This paper introduces a novel brushless, single winding and single stator, dual PM rotor axial-air-gap machine capable to deliver independently torque at the two rotors by adequate vector control. The proposed topologies, the circuit... more
This paper introduces a novel brushless, single winding and single stator, dual PM rotor axial-air-gap machine capable to deliver independently torque at the two rotors by adequate vector control. The proposed topologies, the circuit model, controlled dynamics simulation and preliminary 3D FEM torque production on a case study constitute the core of the paper. The proposed dual mechanical port system