Three-dimensional nonlinear finite element modeling of a voltage source excited transformer feeding a rectifier load

Abstract

A h h d -A novel approach to model the coupling (loading effectr) in t r d o r m u r feeding switching loads is presented. In this approach t r d e r functioxu and nonlinear V-I relationships are used to model a voltage source excited three-dimensional transformer model. Three load C M C~ of the transformer model are considered: (1) no load, (2) linear load, and (3) rectifier load. The results obtained from the three load cues demonstrate that coupling (loading) effects are accounted for in the modeling approach.

A methodology for characterizing fault tolerant switched reluctance motors using neurogenetically derived models

“…In the direct approach, coupling is accounted for by adding the external circuit currents as unknowns directly into the finite-element matrix equation [5], or through the modeling of the circuit elements with zero-dimensional finite elements [6]. The direct approach requires extensive computational time and memory storage space to account for motion and magnetic material nonlinearities.…”

“…For the learning rate, the mutation was constructed so that the range of the mutated values remained in the range of [0,1]. The following equation describes the mutation for the learning rate and momentum: (6) where is a normal random number with a mean of one and a standard deviation of 0.1. This relation ensures that a value in the range [0,1] remains in that range and that the affect on the variable is symmetric with respect to the midpoint of the range of values.…”