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.
The paper presents the possibilities, advantages and author's experience in application of electromagnetic field modeling in the teaching process in the study of electrical engineering specialties. The aim is to demonstrate how on the basis of computer simulations, the students can examine the field distribution for different geometry and operating conditions of given device. In addition, students...
In this article we consider an example of application of GMSH + GetDP software for the calculation of non-stationary electromagnetic fields of electrotechnical devices. The question of the importance of flexible configuration software designed to solve such problems was raised. The article provides an example of the configuration choice for the software complex GMSH + GetDP for the numerical simulation...
One of the common faults encountered in 3 Phase squirrel-cage induction motors (IM) is broken rotor bar faults which constitutes nearly 7% of all the IM failure. In this work, a study on the electromagnetic characteristics of open-loop pulse width modulated (PWM) inverter fed IM is carried out under healthy condition & broken bar fault condition using Finite Element Method (FEM) analysis. The...
This paper describes large-scale full-wave analyses of electromagnetic fields using numerical human body models. This is achieved by the use of the parallel finite element method with iterative domain decomposition. The numerical human body models provided by the National Institute of Information and Communications Technology (NICT) in Japan are composed of voxel data with all sides of 2mm and include...
KERI have been expanding their high power laboratory from 2011 to 2015. Expansion test category includes short time and peak withstand test as well as short-circuit test. In case of short time and peak current with stand test, test current is mainly dependent on the line impedance of secondary part of short time withstand transformer since the secondary side voltage is 1000V or 500V. Because one of...
The main objective of this paper is to determine the capability of the machine to operate at nominal load when some stator coils bars that are cut. Finite element electromagnetic simulations were carried out on an existing hydro generator of 32.5 MVA, 13.2 kV, 60 Hz, 68 poles, 432 stator slots, operating at nominal load with bypassed stator coil. The obtained results in terms of flux density and currents...
The analysis presented in this paper is divided into two main parts. The first part concerns the experimental study of the profile of the electric field and magnetic field generated by the high voltage line transmission at ground level (0 m). While the second part is a simulation study of the profile of the electric field and the magnetic field at different levels above the ground, from 0 m to the...
In this paper the authors consider a real-world set of cables on which Power Line Communication (PLC) signals are transmitted in the power distribution network of a ship. The electrical signals which convey PLC data are carried by unshielded cables and may therefore interact with the external environment and affect the functioning of other devices. On the basis of a set of working assumptions, several...
On the basis of the theoretical analysis, this paper designed a new bearing replacer based on induction heating technique by finite element method. The regularities of the distribution of electromagnetic-thermal coupled field in the replacer, temperature changes with time course and expansion size in shaft and bearing inner race had been simulated during the course of induction heating. The FEM simulation...
It is important to measure thickness of slag dynamically in the process of steelmaking in order to produce high quality steel, eddy current testing has lots advantage to measure it, and system design is based on the analyzing of impedance of sensors. In this paper, we take example of measuring the thickness distribution of liquid slag layer in mold of metallurgical industry; Impedance property is...
In this paper, the cusp electromagnetic field is researched to improve the quality of single crystal. The cusp electromagnetic field in 8 inch single crystal furnace is modeled with ANSYS software, the electromagnetic field distribution, intensity and the factors that influence electromagnetic field intensity, such as current of the coil, distance between two coils and etc., of the cusp electromagnetic...
This paper presents a computation method for analyzing the impact torque characteristics of a new noncontact electromagnetic impact mechanism employing our 3-D FEM code. In this method, magnetic field analysis is coupled with electric circuit analysis and motion analysis. The operating principle of this mechanism is described, and torque performances are shown. The validity of the analysis is verified...
Radio communications is spreading more increasingly and people exposure to non-ionizing electromagnetic fields has increased due to emitting antennas. Human beings are complex electrochemical systems that communicate with the environment through electrical pluses. Electromagnetic field penetrates the human body and can alter functions of his cell, tissue and organs by modifying the biochemical processes...
A generalized macroscopic representation of electrical steels used in transformer manufacturing industry is developed. The proposed representation is specifically formulated for integration in the finite element method. Usage of the specific technique enables the accurate evaluation of electromagnetic field distribution of transformer cores under heavily saturated conditions. Advantages over conventional...
This document contains possibilities of additional asynchronous torque development due to the high harmonics and their general derivation. Also, there is calculated a pulsating torque of 3-phase induction machine with power 1.1kW from electromagnetic field and example of additional asynchronous torque calculation. Whole analysis is done by finite element method in ANSYS. The torque is calculated via...
Permanent magnet brushless DC motors used in aerospace generally have numerous qualities such as light weight, small size, and high efficiency. This means that the thermal design of those motors is very serious. In order to obtain an accurate thermal field simulation of a permanent magnet brushless DC motor, both electromagnetic and thermal fields have to be calculated in a coupled simulation. In...
Power Line Communications (PLC) are a very popular technology having numerous applications ranging in a wide area of industrial and information engineering. In this paper the authors focus on the recently stated promising field of application of PLC to naval transportation systems. Specifically, they take into consideration a real-world set of cables in the power distribution network of a ship, on...
A new four-arm spiral antenna for microwave hyperthermia is presented in this paper. The finite element method was used to simulate the distributions of the electromagnetic fields and the specific absorption rate (SAR) of the four-arm spiral antenna in phantom muscle tissues. The simulation results show heating region of the four-arm spiral antenna can change as the frequency of input excitation....
For a long time, power window was thought to be a criterion of nonthermal effects by researchers in microwave chemistry and bioelectromagnetics. In this paper, we prove that the power window is not one of inherent characteristics of nonthermal effects. We support this by calculating the heating process of sodium chloride solution by microwaves in a transverse electromagnetic (TEM) cell with finite...
A new and simple formulation of equivalent conductivity in the direction normal to the laminations is derived by analyzing and comparing the electromagnetic fields and the eddy current losses in a laminated iron core and a single lamination. Then the anisotropic conductivity tensor is updated. The conductivity formulation can make it easier to calculate numerically three-dimensional eddy current fields...
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.