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In the last decade, modern vehicles have become very complex, being equipped with embedded electronic systems which include more than a thousand of electronic control units (ECUs). Therefore, it is mandatory to analyze the potential risk of automotive systems failure because it could have a significant impact on humans’ safety. This paper proposes a novel, functional safety concept at the power management level of a system basis chip (SBC), from the development phase to system design. In the presented case, the safety-critical application is represented by a powertrain transmission electronic control unit. A step-by-step design guideline procedure is presented, having as a focus the cost, safety, and performance to obtain a robust, cost-efficient, safe, and reliable design. To prove compliance with the ISO 26262 standard, quantitative worst-case evaluations of the hardware have been done. The assessment results qualify the proposed design with automotive safety integrity levels (ASIL, up to ASIL-D). The main contribution of this paper is to demonstrate how to apply the functional safety concept to a real, safety-critical system by following the proposed design methodology.
Diana Raluca Biba; Mihaela Codruta Ancuti; Alexandru Ianovici; Ciprian Sorandaru; Sorin Musuroi. Power Supply Platform and Functional Safety Concept Proposals for a Powertrain Transmission Electronic Control Unit. Electronics 2020, 9, 1580 .
AMA StyleDiana Raluca Biba, Mihaela Codruta Ancuti, Alexandru Ianovici, Ciprian Sorandaru, Sorin Musuroi. Power Supply Platform and Functional Safety Concept Proposals for a Powertrain Transmission Electronic Control Unit. Electronics. 2020; 9 (10):1580.
Chicago/Turabian StyleDiana Raluca Biba; Mihaela Codruta Ancuti; Alexandru Ianovici; Ciprian Sorandaru; Sorin Musuroi. 2020. "Power Supply Platform and Functional Safety Concept Proposals for a Powertrain Transmission Electronic Control Unit." Electronics 9, no. 10: 1580.
The wind turbine’s operation is affected by the wind speed variations, which cannot be followed by the wind turbine due to the large moment of the power plant’s inertia. The method proposed in this paper belongs to the wind turbine power curves (WTPC) approach, which expresses the power curve of the permanent magnet synchronous generator (PMSG) by a set of mathematical equations. The WTPC research papers published before now have not taken into consideration the total power plant inertia at time-variable wind speeds, when the wind turbine’s optimal operation is very difficult to be reached, and its efficiency is thus threatened. The study is based on a wind turbine having a large moment of total inertia, and demonstrates, through extensive simulation results, that the optimal values of the PMSG’s power can be determined based on the kinetic motion equation. This PMSG’s optimal power represents an ideal time-varying curve, and the wind turbine should be controlled so as to closely follow it. For this purpose, proportional integral (PI) and proportional integral derivative (PID) type-based control methods were implemented and analyzed, so that the PMSG’s power oscillations could be reduced, and the PMSG’s angular speed value made comparable to the optimal one, meaning that the wind turbine operates within the optimal operation area, and is efficient. The simulations are actually the numerical solutions obtained by using the Scientific Workplace simulation environment, and they are based on the wind speed measurements collected from a wind farm located in Dobrogea, Romania.
Mihaela-Codruta Ancuti; Sorin Musuroi; Ciprian Sorandaru; Marian Dordescu; Geza Mihai Erdodi. Wind Turbines Optimal Operation at Time Variable Wind Speeds. Applied Sciences 2020, 10, 4232 .
AMA StyleMihaela-Codruta Ancuti, Sorin Musuroi, Ciprian Sorandaru, Marian Dordescu, Geza Mihai Erdodi. Wind Turbines Optimal Operation at Time Variable Wind Speeds. Applied Sciences. 2020; 10 (12):4232.
Chicago/Turabian StyleMihaela-Codruta Ancuti; Sorin Musuroi; Ciprian Sorandaru; Marian Dordescu; Geza Mihai Erdodi. 2020. "Wind Turbines Optimal Operation at Time Variable Wind Speeds." Applied Sciences 10, no. 12: 4232.
In this paper, the operation of the wind power plants at small values of the wind speed is analyzed. The values of the wind turbine's delivered power are determined based on the experimental data from a wind farm located in Galbiori - Dobrogea, in order to observe, to what extent, its operation is in the optimum area from the point of view of the captured energy. The possibility of capturing the maximum wind energy existent at a certain moment is investigated. The time-evolution of the wind turbine's delivered power, at small wind speed values is also analyzed.
Emilia Dobrin; Mihaela-Codruta Ancuti; Sorin Musuroi; Ciprian Sorandaru; Razvan Ancuti; Meda Alexandra Lazar. Dynamics of the Wind Power Plants at Small Wind Speeds. 2020 IEEE 14th International Symposium on Applied Computational Intelligence and Informatics (SACI) 2020, 000187 -000192.
AMA StyleEmilia Dobrin, Mihaela-Codruta Ancuti, Sorin Musuroi, Ciprian Sorandaru, Razvan Ancuti, Meda Alexandra Lazar. Dynamics of the Wind Power Plants at Small Wind Speeds. 2020 IEEE 14th International Symposium on Applied Computational Intelligence and Informatics (SACI). 2020; ():000187-000192.
Chicago/Turabian StyleEmilia Dobrin; Mihaela-Codruta Ancuti; Sorin Musuroi; Ciprian Sorandaru; Razvan Ancuti; Meda Alexandra Lazar. 2020. "Dynamics of the Wind Power Plants at Small Wind Speeds." 2020 IEEE 14th International Symposium on Applied Computational Intelligence and Informatics (SACI) , no. : 000187-000192.
This paper presents an experimental study of junction temperature estimation for main electronics used to control a BLDC (Brushless Direct Current) motor. The BLDC motor is used in 48V mild-hybrid Powertrain applications such belt starter generator or electric oil pump. The real behavior of BLDC electronic interface (gate driver circuit and B6 power MOSFETS) in terms of thermal influence is strongly linked to the safety operation of entire transmission system. Therefore, the performance for normal and for high ambient temperature (HT) operation has been analyzed and validated ‘on-line’ by the experiments. The failure or the degradation of the power circuit caused by operating at HT can be predicted if the component self-heating is considered during design phase as shown in the proposed method. The experimental activities demonstrate that the junction temperature examination is simple and efficient without the need for additional thermal sensors on board or sophisticated procedure for measuring.
Diana-Raluca Biba; Ciprian Sorandaru; Codruta Ancuti; Sorin Musuroi. An Experimental Study of Temperature Influence for A Gate Driver and Power MOSFETS Used in A 48v Transmission Control Unit for A BLDC Actuator Control. 2019 International Conference on ENERGY and ENVIRONMENT (CIEM) 2019, 104 -108.
AMA StyleDiana-Raluca Biba, Ciprian Sorandaru, Codruta Ancuti, Sorin Musuroi. An Experimental Study of Temperature Influence for A Gate Driver and Power MOSFETS Used in A 48v Transmission Control Unit for A BLDC Actuator Control. 2019 International Conference on ENERGY and ENVIRONMENT (CIEM). 2019; ():104-108.
Chicago/Turabian StyleDiana-Raluca Biba; Ciprian Sorandaru; Codruta Ancuti; Sorin Musuroi. 2019. "An Experimental Study of Temperature Influence for A Gate Driver and Power MOSFETS Used in A 48v Transmission Control Unit for A BLDC Actuator Control." 2019 International Conference on ENERGY and ENVIRONMENT (CIEM) , no. : 104-108.
Ciprian Sorandaru; Ion-Rares Stanciu. Detecting Road Irregularities by Image Enhancements and Thresholding. IEEE EUROCON 2019 -18th International Conference on Smart Technologies 2019, 1 .
AMA StyleCiprian Sorandaru, Ion-Rares Stanciu. Detecting Road Irregularities by Image Enhancements and Thresholding. IEEE EUROCON 2019 -18th International Conference on Smart Technologies. 2019; ():1.
Chicago/Turabian StyleCiprian Sorandaru; Ion-Rares Stanciu. 2019. "Detecting Road Irregularities by Image Enhancements and Thresholding." IEEE EUROCON 2019 -18th International Conference on Smart Technologies , no. : 1.
Due to high mechanical inertia and rapid variations in wind speed over time, at variable wind speeds, the problem of operation in the optimal energetic area becomes complex and in due time it is not always solvable. No work has been found that analyzes the energy-optimal operation of a wind system operating at variable wind speeds over time and that considers the variation of the wind speed over time. In this paper, we take into account the evolution of wind speed over time and its measurement with a low-power turbine, which operates with no load at the mechanical angular velocity ωMAX. The optimal velocity is calculated. The energy that is captured by the wind turbine significantly depends on the mechanical angular velocity. In order to perform a function in the maximum power point (MPP) power point area, the load on the electric generator is changed, and the optimum mechanical velocity is estimated, ωOPTIM, knowing that the ratio ωOPTIM/ωMAX does not depend on the time variation of the wind speed.
Ciprian Sorandaru; Sorin Musuroi; Flaviu Frigura-Iliasa; Doru Vatau; Marian Dordescu. Analysis of the Wind System Operation in the Optimal Energetic Area at Variable Wind Speed over Time. Sustainability 2019, 11, 1249 .
AMA StyleCiprian Sorandaru, Sorin Musuroi, Flaviu Frigura-Iliasa, Doru Vatau, Marian Dordescu. Analysis of the Wind System Operation in the Optimal Energetic Area at Variable Wind Speed over Time. Sustainability. 2019; 11 (5):1249.
Chicago/Turabian StyleCiprian Sorandaru; Sorin Musuroi; Flaviu Frigura-Iliasa; Doru Vatau; Marian Dordescu. 2019. "Analysis of the Wind System Operation in the Optimal Energetic Area at Variable Wind Speed over Time." Sustainability 11, no. 5: 1249.
Metal oxide varistors are applied today inside modern surge arresters for overvoltage protection for all voltage levels. Their main issue is the thermal activation of their crossing current, which could lead to complete destruction by thermal runaway. This article presents a new technological solution developed in order to increase the thermal stability of metal oxide varistors. It consists in connecting in parallel two or more similar varistors (for dividing their current), having a thermal coupling between them (for equalizing their temperatures and forcing them to act together and simultaneously as much as possible). Starting from a finite element computer model performed for each situation (varistor standalone or parallel), up to real measurements, the thermal stability of the equipment was analyzed in permanent and impulse regime. Experiments were carried out in the same conditions. Experimental data obtain from two disk varistors corresponds very well to simulations, proving that parallel connection of varistors, combined with a thermal exchange between them is an efficient technical solution for thermal stability improvement, even if not apparently economically justified.
Flaviu Mihai Frigura-Iliasa; Sorin Musuroi; Ciprian Sorandaru; Doru Vatau. Case Study about the Energy Absorption Capacity of Metal Oxide Varistors with Thermal Coupling. Energies 2019, 12, 536 .
AMA StyleFlaviu Mihai Frigura-Iliasa, Sorin Musuroi, Ciprian Sorandaru, Doru Vatau. Case Study about the Energy Absorption Capacity of Metal Oxide Varistors with Thermal Coupling. Energies. 2019; 12 (3):536.
Chicago/Turabian StyleFlaviu Mihai Frigura-Iliasa; Sorin Musuroi; Ciprian Sorandaru; Doru Vatau. 2019. "Case Study about the Energy Absorption Capacity of Metal Oxide Varistors with Thermal Coupling." Energies 12, no. 3: 536.
At the beginning, this article details the manufacturing procedures for varistor materials. Starting from the initial composition of two large series of varistors (those with two additive oxides and those with five additive oxides), there is a major overview of the main stages of the technological process and the equipment used for the production, emphasizing the technological changes that were made. The article continues with the study of the influence of the sintering pressure and the sintering temperature on the electrical properties of the varistor materials made before. There were two experimental series of 7 varistors, one series based on 2 additive oxides and one based on 5 additive oxides. Each varistor of these series was sintered at another temperature, the fundamental purpose being to determine an optimal sintering temperature for each chemical composition. A second activity consisted of manufacturing two more series of varistors with the same chemical composition (2 oxides and 5 additive oxides), which were sintered at two different pressures, for having a set of conclusions on the influence of sintering pressure on the electric performances. All conclusions are underlying a new process for manufacturing metal oxide based varistors.
Flaviu Mihai Frigura-Iliasa; Sorin Musuroi; Ciprian Sorandaru; Doru Vatau. New Technical Parameters and Operational Improvements of the Metal Oxide Varistors Manufacturing Process. Processes 2019, 7, 18 .
AMA StyleFlaviu Mihai Frigura-Iliasa, Sorin Musuroi, Ciprian Sorandaru, Doru Vatau. New Technical Parameters and Operational Improvements of the Metal Oxide Varistors Manufacturing Process. Processes. 2019; 7 (1):18.
Chicago/Turabian StyleFlaviu Mihai Frigura-Iliasa; Sorin Musuroi; Ciprian Sorandaru; Doru Vatau. 2019. "New Technical Parameters and Operational Improvements of the Metal Oxide Varistors Manufacturing Process." Processes 7, no. 1: 18.
The purpose of this paper is to develop an experimental model able to measure the currents in rotor cage bars of an induction machine. In order to achieve it, the authors propose a reversed machine mathematical model, in which the machine rotor represents the inductor and the armature becomes the stator.
Marcus Svoboda; Sorin Musuroi; Mihaela-Codruta Ancuti; Ciprian Sorandaru; Diana Biba. Experimental model for measuring the currents in the rotor cage bars of an induction machine. 2018 International Conference and Exposition on Electrical And Power Engineering (EPE) 2018, 0091 -0096.
AMA StyleMarcus Svoboda, Sorin Musuroi, Mihaela-Codruta Ancuti, Ciprian Sorandaru, Diana Biba. Experimental model for measuring the currents in the rotor cage bars of an induction machine. 2018 International Conference and Exposition on Electrical And Power Engineering (EPE). 2018; ():0091-0096.
Chicago/Turabian StyleMarcus Svoboda; Sorin Musuroi; Mihaela-Codruta Ancuti; Ciprian Sorandaru; Diana Biba. 2018. "Experimental model for measuring the currents in the rotor cage bars of an induction machine." 2018 International Conference and Exposition on Electrical And Power Engineering (EPE) , no. : 0091-0096.
There are many applications employing image processing and/or control algorithms. Video surveillance, visual inspection of manufactured goods are among the examples. Self - driven cars are today one of the hottest topic. Using powerful image processing, control and learning technologies, self-driven vehicles appears to be just around the corner. Another possible application are robots in charge of moving manufactured parts between the stations. Indeed, robotic-carriers (wheeled or tracked) may be visually guided to follow colored lines painted on the floor in order to automatically transport parts between the stations. This paper presents the construction and the implementation of such a visually guided vehicle which is able to follow a white line on a dark background. The vehicle is controlled by a so called embedded computer (a Raspberry Pi board) which uses a camera, minimal image processing and simple control law in order to command the vehicle to “stay on the line”. A description of the vehicle, the setup of the Raspberry Pi board and the image processing and control are also described. The obtained results are also presented.
Rares Stanciu; Ciprian Sorandaru. Low-cost visually servoed tracked vehicle. IEEE EUROCON 2017 -17th International Conference on Smart Technologies 2017, 680 -685.
AMA StyleRares Stanciu, Ciprian Sorandaru. Low-cost visually servoed tracked vehicle. IEEE EUROCON 2017 -17th International Conference on Smart Technologies. 2017; ():680-685.
Chicago/Turabian StyleRares Stanciu; Ciprian Sorandaru. 2017. "Low-cost visually servoed tracked vehicle." IEEE EUROCON 2017 -17th International Conference on Smart Technologies , no. : 680-685.
The goal of this paper is to develop a S-function in MatLab Simulink for a symmetrical induction machine with squirrel cage rotor, in abc coordinates, for having direct access to rotor bars currents. We also use the circuit equivalent method (MEC), for having a hybrid mathematical model. This hybrid model is a simplified combination between abc frame model and MEC For the simulation model of induction machine, was used a real parameters from a 4kW machine.
Marcus Svoboda; Diana Biba; Sorin Musuroi; Codruta-Mihaela Ancuti; Ciprian Sorandaru. Modeling of squirrel cage induction machine with S - function in MATLAB Simulink. 2017 14th International Conference on Engineering of Modern Electric Systems (EMES) 2017, 176 -179.
AMA StyleMarcus Svoboda, Diana Biba, Sorin Musuroi, Codruta-Mihaela Ancuti, Ciprian Sorandaru. Modeling of squirrel cage induction machine with S - function in MATLAB Simulink. 2017 14th International Conference on Engineering of Modern Electric Systems (EMES). 2017; ():176-179.
Chicago/Turabian StyleMarcus Svoboda; Diana Biba; Sorin Musuroi; Codruta-Mihaela Ancuti; Ciprian Sorandaru. 2017. "Modeling of squirrel cage induction machine with S - function in MATLAB Simulink." 2017 14th International Conference on Engineering of Modern Electric Systems (EMES) , no. : 176-179.
This paper presents two links between wind turbine (WT) functional quantities. The first connection is the dependence of the mechanical angular velocity (MAV), corresponding to maximum power point (MPP), labeled as ω OPTIM from the maximum MAV, labeled as ω MAX , at no load operation. In this paper, it is shown that this report for a given WT-PMSG has a constant value and it does not depend on wind speed. Based on this statement, an optimal control in terms of energy could be built on. The second connection is the dependence between the WT maximum power and ω OPTIM .
Ciprian Sorandaru; Sorin Musuroi; Mihaela-Codruta Ancuti; Gheza-Mihai Erdodi; Doru-Ionut Petrescu. Equivalent power for a wind power system. 2016 IEEE 11th International Symposium on Applied Computational Intelligence and Informatics (SACI) 2016, 225 -228.
AMA StyleCiprian Sorandaru, Sorin Musuroi, Mihaela-Codruta Ancuti, Gheza-Mihai Erdodi, Doru-Ionut Petrescu. Equivalent power for a wind power system. 2016 IEEE 11th International Symposium on Applied Computational Intelligence and Informatics (SACI). 2016; ():225-228.
Chicago/Turabian StyleCiprian Sorandaru; Sorin Musuroi; Mihaela-Codruta Ancuti; Gheza-Mihai Erdodi; Doru-Ionut Petrescu. 2016. "Equivalent power for a wind power system." 2016 IEEE 11th International Symposium on Applied Computational Intelligence and Informatics (SACI) , no. : 225-228.
An increased research effort on the topic of unity-power-factor rectifiers has been lately noticed. In this paper two highly efficient three-phase buck-type unity power factor rectifiers are proposed to be studied: the conventional six-switch (single-stage) and its two-stage version, referred as the interleaved six-switch solution. They are in here compared in terms of efficiency and performances. The interleaved switching strategy is more efficient due to the AC-side input current harmonics cancellation and to the DC-side voltage ripple reduction. Performances of the two PFC topologies are evaluated for various power ranges, based on simulation studies performed in GECKO Circuits environment. Much more, their efficiency evaluation is also provided and it seems that, for the interleaved topology, higher power efficiency than for the single-stage PFC rectifier solution is assured. The IEC 6000-3-2 standard requirements are met in both cases.
Mihaela-Codruta Ancuti; Valeriu-Nicola Olarescu; Ciprian Sorandaru; Sorin Musuroi. High efficiency single-stage and two-stage six-switch three-phase PFC buck-type rectifiers. 2015 Intl Aegean Conference on Electrical Machines & Power Electronics (ACEMP), 2015 Intl Conference on Optimization of Electrical & Electronic Equipment (OPTIM) & 2015 Intl Symposium on Advanced Electromechanical Motion Systems (ELECTROMOTION) 2015, 794 -799.
AMA StyleMihaela-Codruta Ancuti, Valeriu-Nicola Olarescu, Ciprian Sorandaru, Sorin Musuroi. High efficiency single-stage and two-stage six-switch three-phase PFC buck-type rectifiers. 2015 Intl Aegean Conference on Electrical Machines & Power Electronics (ACEMP), 2015 Intl Conference on Optimization of Electrical & Electronic Equipment (OPTIM) & 2015 Intl Symposium on Advanced Electromechanical Motion Systems (ELECTROMOTION). 2015; ():794-799.
Chicago/Turabian StyleMihaela-Codruta Ancuti; Valeriu-Nicola Olarescu; Ciprian Sorandaru; Sorin Musuroi. 2015. "High efficiency single-stage and two-stage six-switch three-phase PFC buck-type rectifiers." 2015 Intl Aegean Conference on Electrical Machines & Power Electronics (ACEMP), 2015 Intl Conference on Optimization of Electrical & Electronic Equipment (OPTIM) & 2015 Intl Symposium on Advanced Electromechanical Motion Systems (ELECTROMOTION) , no. : 794-799.
In this paper, we present a method for controlling a wind system consisting in a wind turbine (WT) and a permanent magnet synchronous generator (PMSG) so as to achieve the operation in the optimum energy efficient zone at time-varying speeds of wind. It analyzes the operation of a WT in the maximum power zone by changing the generator load, while the wind speed varies significantly over time. The coordinates of the maximum power point (MPP) changes over time and they are determined by the values of the instantaneous wind speed and mechanical inertia. So not always the wind system can be brought quickly to operate in the MPP zone. By measuring wind speed, the optimum dc current (ICC-OPTIM) can be obtained, the generator load can be controlled and thus it can extract the maximum mechanical energy at time-varying wind speeds.
Ciprian Sorandaru; Sorin Musuroi; Mihaela-Codruta Ancuti; Gheza-Mihai Erdodi; Doru-Ionut Petrescu. The control of the wind power systems by imposing the DC current. 2015 IEEE 10th Jubilee International Symposium on Applied Computational Intelligence and Informatics 2015, 259 -264.
AMA StyleCiprian Sorandaru, Sorin Musuroi, Mihaela-Codruta Ancuti, Gheza-Mihai Erdodi, Doru-Ionut Petrescu. The control of the wind power systems by imposing the DC current. 2015 IEEE 10th Jubilee International Symposium on Applied Computational Intelligence and Informatics. 2015; ():259-264.
Chicago/Turabian StyleCiprian Sorandaru; Sorin Musuroi; Mihaela-Codruta Ancuti; Gheza-Mihai Erdodi; Doru-Ionut Petrescu. 2015. "The control of the wind power systems by imposing the DC current." 2015 IEEE 10th Jubilee International Symposium on Applied Computational Intelligence and Informatics , no. : 259-264.
The aim of this paper is to obtain the energy stored in the electric accumulators (EA), for a wind system operating at a time-variable wind speed. Mechanical energy captured by the wind turbine (VT) is converted into electric energy by permanent magnet synchronous generator, PMSG. The synchronous generator provides energy into an electric accumulator, by using a rectifier, in two ways: uncontrolled rectifier and controlled rectifier and adjusted load. The simulations performed in this paper can highlight the differences between the two situations.
Sorin Musuroi; Ciprian Sorandaru; Gheza-Mihai Erdodi; Doru-Ionut Petrescu. Wind system with storage in electrical accumulators. 2015 9th International Symposium on Advanced Topics in Electrical Engineering (ATEE) 2015, 797 -802.
AMA StyleSorin Musuroi, Ciprian Sorandaru, Gheza-Mihai Erdodi, Doru-Ionut Petrescu. Wind system with storage in electrical accumulators. 2015 9th International Symposium on Advanced Topics in Electrical Engineering (ATEE). 2015; ():797-802.
Chicago/Turabian StyleSorin Musuroi; Ciprian Sorandaru; Gheza-Mihai Erdodi; Doru-Ionut Petrescu. 2015. "Wind system with storage in electrical accumulators." 2015 9th International Symposium on Advanced Topics in Electrical Engineering (ATEE) , no. : 797-802.
This paper proposes two different low-cost ferrite solutions: first a V permanent magnet assisted synchronous reluctance rotor (VPMSynRM) and the second a permanent magnet synchronous rotor with flux concentrator (PMSM-FC) as an alternative solution to the rare earth inserted tangential permanent magnet synchronous motor (PMSM). Finite element (FEM) approach has been utilized to show the performance of the proposed rotors. The purpose of the proposed solution is to replace only the rotor of such a PMSM that is already in production, so the size of the stator and the number of windings will remain unchanged. The motivation of this study is to reduce the cost of the rotor by changing the type of PM and by the choice of suitable rotor geometry.
Sorin Musuroi; Ciprian Sorandaru; M. Greconici; V.N. Olarescu; M. Weinman. Low-cost ferrite permanent magnet assisted synchronous reluctance rotor and permanent magnet synchronous rotor with flux concentrator an alternative for rare earth permanent magnet synchronous motors. 2014 International Conference on Applied and Theoretical Electricity (ICATE) 2014, 1 -6.
AMA StyleSorin Musuroi, Ciprian Sorandaru, M. Greconici, V.N. Olarescu, M. Weinman. Low-cost ferrite permanent magnet assisted synchronous reluctance rotor and permanent magnet synchronous rotor with flux concentrator an alternative for rare earth permanent magnet synchronous motors. 2014 International Conference on Applied and Theoretical Electricity (ICATE). 2014; ():1-6.
Chicago/Turabian StyleSorin Musuroi; Ciprian Sorandaru; M. Greconici; V.N. Olarescu; M. Weinman. 2014. "Low-cost ferrite permanent magnet assisted synchronous reluctance rotor and permanent magnet synchronous rotor with flux concentrator an alternative for rare earth permanent magnet synchronous motors." 2014 International Conference on Applied and Theoretical Electricity (ICATE) , no. : 1-6.
The main objective of this work is the determination of the relationship between wind speed and optimum speed. In this paper we determine the mechanical energy captured from the wind turbine (WT) and transformed into electricity by permanent magnet synchronous generator (PMSG) connected to WT. We can determine, through simulation, the mechanical angular speed (MAS), ω OPTIM and optimum load resistance (R OPTIM ) for the PMSG where the energy is high, considering the wind speed variable over time.
Gheza-Mihai Erdodi; Doru-Ionut Petrescu; Ciprian Sorandaru; Sorin Musuroi. The determination of the maximum energetic zones for a wind system, operating at variable wind speeds. 2014 18th International Conference on System Theory, Control and Computing (ICSTCC) 2014, 256 -261.
AMA StyleGheza-Mihai Erdodi, Doru-Ionut Petrescu, Ciprian Sorandaru, Sorin Musuroi. The determination of the maximum energetic zones for a wind system, operating at variable wind speeds. 2014 18th International Conference on System Theory, Control and Computing (ICSTCC). 2014; ():256-261.
Chicago/Turabian StyleGheza-Mihai Erdodi; Doru-Ionut Petrescu; Ciprian Sorandaru; Sorin Musuroi. 2014. "The determination of the maximum energetic zones for a wind system, operating at variable wind speeds." 2014 18th International Conference on System Theory, Control and Computing (ICSTCC) , no. : 256-261.
This paper proposes two low-cost ferrite V permanent magnet assisted synchronous reluctance rotors (VPMSynRM) as an alternative solution to the rare earth inserted tangential permanent magnet synchronous motor (PMSM). Finite element (FEM) approach has been utilized to show the performance of the proposed rotors. The purpose of the proposed solution is to replace only the rotor of such a PMSM that is already in production, so the size of the stator and the number of windings will remain unchanged. The motivation of this study is to reduce the cost of the rotor by changing the type of PM and by the choice of suitable rotor geometry.
Sorin Musuroi; Ciprian Sorandaru; M. Greconici; V.N. Olarescu; M. Weinman. Low-cost ferrite permanent magnet assisted synchronous reluctance rotor an alternative solution for rare earth permanent magnet synchronous motors. IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society 2013, 2966 -2970.
AMA StyleSorin Musuroi, Ciprian Sorandaru, M. Greconici, V.N. Olarescu, M. Weinman. Low-cost ferrite permanent magnet assisted synchronous reluctance rotor an alternative solution for rare earth permanent magnet synchronous motors. IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society. 2013; ():2966-2970.
Chicago/Turabian StyleSorin Musuroi; Ciprian Sorandaru; M. Greconici; V.N. Olarescu; M. Weinman. 2013. "Low-cost ferrite permanent magnet assisted synchronous reluctance rotor an alternative solution for rare earth permanent magnet synchronous motors." IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society , no. : 2966-2970.
In this paper a method for tuning the load of the photovoltaic solar panels (PVSP) based on measuring short-circuit current, I SC , and calculating the optimum current I OPTIM currents corresponding points of maximum power (MPP) is presented. Consequently, a permanent operation in MPP is ensured.
Ciprian Sorandaru; Marius Babescu; Sorin Musuroi. Load control method for photovoltaic solar panels based on the measurement of short circuit currents. 2013 17th International Conference on System Theory, Control and Computing (ICSTCC) 2013, 503 -506.
AMA StyleCiprian Sorandaru, Marius Babescu, Sorin Musuroi. Load control method for photovoltaic solar panels based on the measurement of short circuit currents. 2013 17th International Conference on System Theory, Control and Computing (ICSTCC). 2013; ():503-506.
Chicago/Turabian StyleCiprian Sorandaru; Marius Babescu; Sorin Musuroi. 2013. "Load control method for photovoltaic solar panels based on the measurement of short circuit currents." 2013 17th International Conference on System Theory, Control and Computing (ICSTCC) , no. : 503-506.
Due of its significant economical impact, Power-Quality (PQ) analysis is an important domain today. Severe voltage distortions affect the consumers and disturb their activity. They may be caused by short circuits (in this case the voltage drops significantly) or by varying loads (with a smaller drop). These two types are the PQ currently issues. Monitoring these phenomena (called dips or sags) require powerful techniques. Digital Signal Processing (DSP) algorithms are currently employed to fulfill this task. Discrete Wavelet Transforms, (and variants), Kalman filters, and S-Transform are currently proposed by researchers to detect voltage dips. This paper presents a Lab VIEW implementation of the α-β-γ tracking filter. Discovered and tested during the cold-war era, these algorithms can estimate one-step-ahead a parameter of interest based of previously recorded values. This algorithm was tested using real data representing the 110kV power line. The obtained results are also presented.
Florin Molnar-Matei; Ciprian Sorandaru. LabVIEW implementation of tracking filters for voltage dip detection. Eurocon 2013 2013, 897 -902.
AMA StyleFlorin Molnar-Matei, Ciprian Sorandaru. LabVIEW implementation of tracking filters for voltage dip detection. Eurocon 2013. 2013; ():897-902.
Chicago/Turabian StyleFlorin Molnar-Matei; Ciprian Sorandaru. 2013. "LabVIEW implementation of tracking filters for voltage dip detection." Eurocon 2013 , no. : 897-902.