3-D finite element method for analyzing magnetic fields in electrical machines excited from voltage sources

Abstract

A new method for analyzing 3-D magnetic fields and currents in electrical machines excited from voltage sources using the A -# method has been developed.The basic idea and the finite element formulation of the method are described. The effectiveness of the method is shown by some examples of application.

Finite element modeling of a transformer feeding a rectified load: the coupled power electronics and nonlinear magnetic field problem

“…If the excitation IS a linear circuit, this circuit can be modeled by two basic methods. One method consists of adding the unknown circuit currents as unknowns to the finite element matrix equation [2], [3]. The other method consists of modeling the cvcuit wth zero-dimensional finite elements [4].…”

Factors affecting errors due to 2-D approximate analysis of 3-D magnetic fields with eddy currents (rotating machines)

“…Two pole pieces of semilength in the z-direction are put inside a infinite length. The coil is excited from a current or voltage source [2,3]. In order to only factors mentioned in Section I , the characteristic of the solid pole pieces is mil c i t e length) assumed to be linear and the relative permeability is taken to be 1000.…”

3-D Finite Element Analysis of Eddy Current in Laminated Cores of the Interior Permanent-Magnet Motor

“…In the magnetic-field analysis taking the voltage source into account, the equations of the magnetic field and the electric circuit are coupled, which are given by the magnetic vector potential and the exciting current as follows [7], [8]: (3)…”