A comparative analysis of methods for calculating the transientvoltage distribution within the stator winding of an electric machinesubjected to steep-fronted surge

摘要

Three approaches are presented for predicting the magnitude anddistribution of the transient voltages in the stator winding of anelectric machine subjected to a steep-fronted surge. In this paper,multiconductor transmission line theory forms the basis of the threemethods described. These methods utilise some aspects of the previousworks to achieve simplification of solution without loss of accuracy.Indirect boundary integral equation method has been used to calculatethe necessary capacitances in this analysis. Duality existing betweenthe electric field and the magnetic field has been use to calculate thenecessary inductances. Results predicted by these methods have beencompared with experimental results. Recommendations for machines fedfrom a frequency converter are also included