|Autors: Spasov, V. K.|
Title: ENHANCING THE ACCURACY AND SPEED OF THE FINITE ELEMENT ANALYSIS OF OPEN BOUNDARY MAGNETIC PROBLEMS
Keywords: Open boundary magnetic problems, FEMM 4.2, electromagnetic force, truncation, mixed boundary conditions, Kelvin transformation.
Abstract: Three approaches for solving open boundary magnetic problems are analyzed - truncation, mixed boundary conditions and the Kelvin transformation. They are applied to compute the electromagnetic force of an open boundary problem consisting of three current-fed conductors. First the force is computed analytically. Based on the approaches, numerical models are developed and solved by the FEMM 4.2 program. The accuracy of the numerically computed forces is determined by the relative error with regard to the analytical values. A comparison is made from the viewpoint of accuracy, speed and visualization capabilities of the approaches. The results show that the Kelvin transformation greatly enhances the accuracy and speed of the finite element analysis of open boundary magnetic problems. Accuracy within 0.1% is easily achieved with the smallest number of finite elements and the tiniest discretized area.
Вид: публикация в международен форум, публикация в реферирано издание, индексирана в Scopus