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 following topics are dealt with: computational electromagnetics; design and optimisation; numerical methods; coupled problems and hybrid methods; CEM methods and techniques.
The use of time domain methods for the solution of electromagnetic field problems is a widely established technique, especially when it comes to consider problems with strong nonlinear material properties or complex multi-physically coupled field problems. In these schemes, the geometric discretization of Maxwell equations yields large time-continuous systems of ordinary differential or differential-algebraic...
The surface current components for two parallel loop antennas were investigated, for different operating frequencies and spacing distances. The modelling method used employed a two-dimensional electric surface patch integral-equation formulation, solved by independent piecewise-linear basis function methods in the circumferential and axial directions of the wire. The loops are each fed by simple axially-directed...
The deformation due to magnetic forces and magnetostriction can be computed on the basis of the magnetoelastic equations derived in previous papers. This paper focusses on two aspects of this computation method, viz the magnetic couple density, which can be represented by equivalent volume and surface force densities, and magnetoelastic interactions, i.e. the interaction between the magnetic and elastic...
Basic principles and mathematical background of various lumped parameter identification methods for different types of electrical machines (e.g. synchronous machine, induction machine) are discussed in this paper. The idea is to provide a common theoretical framework and clearly differentiate the different approaches commonly encountered in literature.
The block-P3M algorithm is a new development ot the P3M (particle-particle/particle-mesh) method. It gives O(N log N) complexity and O(N) storage of action-at-a- distance convolution sums for any distribution of sources and for any displacement invariant green's function. It gives optimal accuracy and, unlike the Fast multipole method, it does not suffer from low frequency breakdown problems.
This paper presents an improved buffered block forward backward (BBFB) technique for the solution of 3D wave scattering problems. The BBFB method displays rapid convergence when the eigenvalues of the associated iteration matrix are small. Conversely when the eigenvalues are large it displays poorer convergence. The optimised step presented in this paper helps to circumvent the poor convergence of...
A scheme for the totally error controlled simulation of three-dimensional transient magnetic field problems is presented, combining lowest order Whitney finite elements with Zienkiewicz-Zhu-type gradient recovery error estimators for spatial mesh adaptivity with higher order embedded SDIRK schemes for adaptive time step selection. Numerical results are presented for a magnetoquasistatic benchmark...
In this paper, a comparison completeness of the three kernel approximations that are commonly used in smoothed particle hydrodynamics (SPH) to polynomial functions and their derivatives is conducted. Those are applied for the time domain Maxwell's curl equations and the numerical results is compared with analytic solution. It is shown that the smoothed particle method for Maxwell's equations - smoothed...
The paper develops an efficient computational method for establishing equivalent characteristics of magnetic joints of transformer cores, with special emphasis on step-lap design. This enables comparative analysis of designs without the need for difficult measurements.
GRASPTM is used as a quasi optical (QO) design tool. It has been demonstrated to be a suitable tool for modelling an FSS among a train of reflectors constituting a typical QO feed system. Such a capability facilitates later studies of aberration introduced specifically by the FSS.
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.