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Diversity of communication technologies in Internet of Things and increasing the amount of sensor data outlined the idea of using intermediate devices for storage and pre-processing — such as gateways in sensor networks. Moreover, semantic interoperability is emerging as an attractive solution for communication between autonomous entities or smart objects in Internet of Things, so the paper examines...
The paper deals with wound rotor synchronous motor synchronization when the motor starts in asynchronous regime. “The fineness” of the synchronization will be studied in terms of the following parameters: the value of the starting resistance, the value of the DC voltage and the position of the rotor against magnetic field of the stator at the moment when the excitation winding is connected to the...
This paper will conduct a study on determining the parameters of a single-phase synchronous motor with permanent magnets (PM). It is a low power motor used especially in household applications. The goal is the determination of the motor parameters by tests and simulations, without knowing the properties of the rotor permanent magnet. There are known all geometric dimensions and the number of turns...
The paper presents some considerations regarding the framework design for a medium voltage SF6 switch disconnector based on 3D Finite Element Method Simulation. The conflict between dielectric design, at one side and technologically challenges, costs and dimensions on the other side is the main issue of this research. The analytically designed configuration is implemented in CST Studio Suite environment...
The paper presents the effort of the authors to minimize the computational time and resources brought in electrical machines conception, design and analyses. The proposed methodology is a mixture between Finite Element Analysis and neural network interpretation of resulting data, with important conclusions about the minimum number of inputs asked by the desired accuracy. The methodology is illustrated...
This paper deals with sudden short-circuit transient regimes of a three-phase salient poles synchronous generator. The three-phase, two-phase and single-phase transient short-circuits of a synchronous generator with two pole pairs, 1500 rev/s, are studied analytically, by finite elements analysis (FEA) and experimentally. Analytic study was performed using Mathcad and FEA was performed using MagNet...
The wireless power transfer (WPT) is an technology from 1856, but not enough used for the moment. It is based on magnetic resonance between two or more coils. In this paper you will see a two simulations of the WPT, one made in FEMM to see the magnetic field between two coils (emitter and receiver), and other one to see how circuit work, and how the capacitor are charging, made in LT Spice.
In this paper we perform a study regarding capacitive touch sensors, structured on Finite Element Method applied on electrostatic field simulation. The behavior of the sensors for different architecture regarding: the electrodes, the ground planes or/and the shields, the overlay thickness and the influences of the nearby potentials is modeled and interpreted. The right setup of the Finite Element...
This paper proposes a method of finite elements analysis (FEA) of the rotor cage induction motor. In case of an induction motor supplied with constant voltage, the current during starting process is not constant. For that reason, FEA in frequency domain at constant current is not appropriate for direct start simulation. A motion analysis is required, the rotor speed being computed according to magnetic...
The paper presents some considerations about power system grounding based on analytical computation, Finite Element Analysis (FEA) combined with neural network. There are studied vertical rods buried on different depth in homogenous and double-layer soil. First, the analytical solutions are compared with the numerical results for certifying the FEA settings then, different configurations for electrodes...
The aim of this work is to provide the simplest way for estimate the energy production of a photovoltaic (PV) system anywhere on the earth. Irradiance, yearly irradiation, PV module temperature, yearly electricity production are computed quantities which lie on the basis of the final form of the method, namely a graph. The results are compared with those generated by available and trusted online software...
This paper presents the finite elements analysis (FEA) of a salient poles synchronous generator. The goal of this analysis is to determine the machine parameters in steady-state regime and in transient regime respectively. The used FEA techniques and obtained results for a case study will be presented as well. Finally the FEA results will be compared to the experimental ones and a 2D transient with...
In this paper a miniature circuit breaker (MCB) is analyzed using a finite method analysis (FEA) software. Once the 3D model was implemented, a series of simulations were carried out in order to find out the forces that appear inside the electromechanical trip unit and what influences the plunger to trip faster. Also, the influence of the material nonlinearity is emphasized in order to understand...
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