The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this work, the shock survivability of MEMS gyroscopes under different shock conditions are investigated. Both shock experiments and numerical simulations are carried out to study the influences of the shock load level, duration and damping conditions. The simulation results are consistent with the experimental results. The results indicate that the selections of natural frequencies and air-damping...
This paper proposes a novel approach to faulty phase selection using S-transform and phase current integration for the fast transmission line protection. The paper analyzes the modulus characteristics of various types of fault and the characteristics of phase current for two phases to ground fault. On the basis of it, the phase selection algorithm first uses S-transform to get single frequency phasor...
A new method for identification of defects in winding insulation of switched off electric motors connected by a cable to a power source. To assess condition of a motor, rectangular voltage pulse is applied to one of motor connection phases. Mathematical simulation and experimental studies of motors with defects have shown that AC voltage between phases emerges at the subsequent discharge of interphase...
In this paper, we report results of parametric study on the radiation efficiency of woven textile antennas using full-wave simulations and measurements. The parameters of interest are the conductive thread diameter and intervals between the threads consisting of a rectangular woven patch. In a full-wave simulation tool, rectangular patch antennas are modeled by weaving conductive threads with different...
Active power loss reduction in distribution system is most important for power loss minimization in distribution system which results in simple operation and planning of distribution system. The main aim of this paper is to show the active or real power loss reduction in distribution system by network reconfiguration method which can be obtained by changing the configuration of the distribution system...
This paper proposes to analyze the influence of the displacement of the capacitor plates on the performances of an electrical coupled contactless power transfer system. The armatures are of circular form and the values of their radii are different. Some formulae are obtained and based on them graphical representations are made in order to analyze the nonlinear behavior. Then these variable values...
In this paper, we proposed a new mathematical model of the I-V characteristic of a faulty photovoltaic generator. It presents its behavior in normal and faulty operations. In particular, when its basic components such as cells, bypass and blocking diodes are subjected to the impedance or reversed polarity faults. The developed model of the faulty PV generator will allow studying of the I-V characteristic,...
In this paper, we proposed a new mathematical model of a faulty photovoltaic generator operation. It presents its behavior, when it's subjected to the open-circuit and the short-circuit faults at its basic components as: cells, bypass diodes and blocking diodes. Such kind of modeling will allow developing fault detection and diagnosis methods. Indeed, the proposed model will be used to set normal...
In this simulation, the cardiovascular model was developed base on the physiological study. The parameter identification and validation was done with physiological data using Matlab/Simulink. This study has adopted the principle differential equation using analog-lump parameter model. The wave forms such as pressure, volume and flow in cardiovascular system were simulated. The simulation of cardiovascular...
Electricity demand is mounting around the world due to increased world population. For the years, conventional energy resources have been employed for the purpose of power generation. Rapid depletion plus their environmental and economic concerns has challenged the compatibility of conventional resources to deal with this mounting electricity demand. Therefore, it is necessary to exploit the renewable/alternative...
This paper presents the mathematical model of the useful movement of the electric vehicles. On the mathematical model basis it is built the structural diagram and the SIMULINK model associated of the useful movement. The SIMULINK model is used to calculate the energy consumption for different running regimes and different route configurations and to identify energy efficient train control methods.
In this paper there are presented a series of dynamic regimes obtained for the case when some disturbances occur during the operation of a reluctance synchronous motor operation: the decrease of the sinusoidal supply voltage value and the supply by a non-sinusoidal source of voltage (indirect voltage and frequency converter voltage source with PWM command and voltage inverter with pre-computed moments...
This paper present the speed controller based on fuzzy logic applied to photovoltaic water pumping systems driving by a brushless permanent magnet motor. The study proposed model consists essentially of photovoltaic generator associated to chopper converter controlled by fuzzy logic to ensure the maximum power point tracking. However, in order to have the desired performances, a robust controller...
In this study, implementation of design and simulation programme of a solar energy (photovoltaic panel) supported hybrid electric vehicle was designed, which is considered to be widely used in the 21st century. In the study, DC motor was simulated for a serial hybrid electric vehicle in ICE-generator and photovoltaic panel matlab/simulink environment. Moreover, a .m file was written by calculating...
Recently, semiconductor counterfeiting has become a serious problem. Physical Unclonable Function (PUF) prevents counterfeiting. It utilizes random characteristic patterns which are difficult to control artificially. PUF can identify genuineness semiconductor, even if all circuit patterns are duplicated. However, the conventional PUF is weak against modeling attacks. This study proposes a PUFID generating...
With the growing use of electronic soft-starters for starting fixed-speed three-phase squirrel-cage induction motors with a rated power higher than 4 kW, the six-terminal star/delta-connection stator windings with delta as the nominal connection, used for the typical contactor-based star-delta starting, are not mandatory. In fact, when a motor is to be started with an electronic soft-starter, it can...
Quasi-ballistic electron transport in ultrashort FDSOI devices is analyzed using Multi-Subband Monte Carlo (MSMC) simulations, taking into account the main scattering mechanisms: phonons, surface roughness, and charged impurities in the access regions. In particular, the ballistic resistance (defined as the resistance of the channel in absence of scattering) was extracted from ballistic simulations,...
In this paper, three existing distributed PV system configurations are reviewed and compared in depth. A novel ultra-high-frequency-AC (UHFAC) PV system for residential application is proposed. Compared with traditional DC parallel PV systems, this new approach eliminates the high voltage DC bus by replacing it with UHFAC bus, which avoids the DC arcing fault and enables ultra-fast short circuit protection...
The complexity of electromagnetic simulation of high-speed interconnects drastically rises as frequency moves upwards. Although full wave simulation is with high precision and capable of electromagnetic simulation through dc to hundreds of gigahertz, for consideration of high efficiency the quasi-static-electromagnetic-field-based parameters extraction combined with the circuit simulation still remains...
A method for estimating induction motor's rotor speed is proposed in this paper. The proposed rotor speed estimation method is based on model reference adaptive identification theory. By applying the proposed rotor speed estimation method, the induction motor control system can simultaneously estimate the stator resistance and the rotor speed of the induction motor. The proposed speed sensorless control...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.