Serwis Infona wykorzystuje pliki cookies (ciasteczka). Są to wartości tekstowe, zapamiętywane przez przeglądarkę na urządzeniu użytkownika. Nasz serwis ma dostęp do tych wartości oraz wykorzystuje je do zapamiętania danych dotyczących użytkownika, takich jak np. ustawienia (typu widok ekranu, wybór języka interfejsu), zapamiętanie zalogowania. Korzystanie z serwisu Infona oznacza zgodę na zapis informacji i ich wykorzystanie dla celów korzytania z serwisu. Więcej informacji można znaleźć w Polityce prywatności oraz Regulaminie serwisu. Zamknięcie tego okienka potwierdza zapoznanie się z informacją o plikach cookies, akceptację polityki prywatności i regulaminu oraz sposobu wykorzystywania plików cookies w serwisie. Możesz zmienić ustawienia obsługi cookies w swojej przeglądarce.
2017 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM) & 2017 Intl Aegean Conference on Electrical Machines and Power Electronics (ACEMP)
In battery supplied multilevel converters it is a common problem to maintain the energy balance between the energy storage placed in different modules. Large unbalance between the state-of-charge (SoC) appears when a damaged battery module is exchanged, and with high probability the newly inserted battery module has different SoC than the other modules. In case the unbalance is large it takes long...
The performance of the hybrid structures PV/TEG/STC which consist of photovoltaic cells PV, thermoelectric elements TEG and solar collector STC is studied in this paper function of different levels of illumination from 30 suns to 130 suns (1 sun = 1000 W/m2). The concentrated light is obtained using a solar simulator with four parabolic xenon lamps and an optical mixer to ensure the quasi homogenous...
This paper presents the design of a system for studying photovoltaic cells PV, thermoelectric generators TEG, a solar collector SC and different hybrid structures comprising two or three of them in concentrated light. The concentrated light is obtained using a Fresnel lens and a sun tracker. The advantages of the system are: the reduction of the photovoltaic cells area, the use of the photovoltaic...
The active filtering and regeneration systems used in active DC traction substations must allow the natural transition from filtering to regeneration mode and vice versa. In the both operation modes, active filtering and regeneration, the grid current must be sinusoidal. Consequently, the magnitude of the fundamental network current is necessary in the control part, in order to generate the reference...
This paper presents the results of voltage and current Total Harmonic Distortion (THD) minimization for a three-phase cascaded H-bridge inverter with a fundamental staircase modulation. Theoretically optimal switching angles are found using THD minimization time domain constraint optimization problem formulations. Numerically obtained optimal switching angles and minimal voltage and current THD values...
The world population depends highly on fossil fuels (for power generation, transportation, etc), this leads to oil price increases because of the depletion of fossil fuels. This paper is dealing with the use of RES in transportation. Pollution from the today transportation means, based on ICE (burning gas) especially in urban conglomerates and is off great concern. The renewable energy sources (RES)...
This treatise deals with Transistor Clamped Five Level Inverter using Non-Inverting Double Reference Single Carrier PWM (NIDRSC PWM) Technique. Conventional or two level inverter have drawbacks like: i) Requirement of fast switching devices, ii) Very high dv/dt, iii) High Electromagnetic Interferences (EMI), iv) Bulky filters, v) Faster heating of switches, and vi) Not suitable for high voltage applications...
This paper focuses on an analysis on compatibility between power grid quality voltage and dispatchable photovoltaic plant integration. In this order, based on a simulation, voltage dips have been calculated on the bus bars of a test system (IEEE-RTS). The method for voltage dip estimation used in this paper provides the frequency of voltage dips, due to symmetrical and unsymmetrical faults in the...
Indoor exploration based on panoramic images has been of interest in both navigation and visualization scenarios of mobile intelligent systems, becoming an appealing research topic in hardware design and computational algorithms. A detailed profile of an indoor scene further used for 3D reconstruction purposes or visualization requires an accurate high-resolution rendering from multiple camera shots...
The microelectronic industry is driven by the continuous demand for processing capabilities and performance. As such, most processing is performed nowadays in a digital fashion. Analog however is not to be neglected. A key feature in modern mixed-signal processing is wide-range tuning of the analog processing sections. One step forward is the implementation of digitally programmable analog. The aim...
FPGAs are continuously increasing in both chip size and operating frequency. Dynamic reconfiguration is easier and more stable with current generation of hardware and software tools. These characteristics have made them more accessible to generic acceleration tasks instead of specialized functions. As a consequence, FPGAs are being deployed in more computing clusters than in the past. This leads to...
A hardware-in-the-loop technique is developed to control a permanent magnet synchronous motor. The chosen motor is a commercial one and is used for positioning a solar tracker over the azimuth or the elevation directions. The control strategy was initially tested on a real time controller and adapted afterwards for the given electromechanical system. A Matlab/Simulink simulation is provided for the...
A PDE variational image interpolation framework is proposed in this work. We construct a variational model which minimizes an energy cost functional that is specially designed for the inpainting process. A nonlinear anisotropic diffusion-based scheme is then derived from this minimization problem by determining the Euler-Lagrange equation and using the steepest descent method. The achieved second-order...
The 13C is a non-harmful, stable isotope that has essential uses in various fields of science: biology, chemistry, pharmaceutical research, medicine and different fields of engineering. Being very rare, a separation process is needed to obtain high concentration quantities. The automation of such a process is a challenge in the field of control engineering. This paper discusses the separation system,...
Predictive maintenance is a promising approach but upgrading existing machinery is expensive and difficult, thus replacing the machines is economically not worthwhile. A simple solution to upgrade existing machinery is required. With the proposed age estimation of electronic devices a first step towards such a system is taken. A test setup for accelerated aging of switched mode power supplies as well...
The paper addresses the problem of image processing techniques used for conservation-restoration works from the Cultural Heritage. It compares the results of image processing obtained by using the histogram equalize and Retinex algorithms, by means of two metrics proposed by the International Commission of Illumination. The paper intends to stress some differences that exist between the uses of images...
Thermal comfort inside buildings is obtained by using advanced automatic heating systems. Whatever the complexity of these systems, controlling the amount of heat produced in a heating installation that operates with boilers and radiators is always done by controlling temperature of thermal agent. In this article there are made the models for two types of automatic systems that control the temperature...
This paper presents the simulation of a variable gain amplifier from three perspectives: functional, using LTspice circuit simulator; signal-to-noise-ratio, computed with Excel and power consumption, estimated with ACEplorer power simulator. The architectural decisions are taken based on these simulations to meet the following requirements: a dynamic range greater than 60 dB, the frequency domain...
This paper proposes an FPGA based circuit for angular position estimation using inertial measurement units (IMU). Angular position estimation is done by fusing the data measured by the accelerometer and the gyroscope. The accelerometer measures multiple forces that act on the sensor making the measured data noisy therefore unreliable, data measured on the gyroscope has data drifting problems. The...
Podaj zakres dat dla filtrowania wyświetlonych wyników. Możesz podać datę początkową, końcową lub obie daty. Daty możesz wpisać ręcznie lub wybrać za pomocą kalendarza.