STRIPS METHOD FOR EVALUATING A.C. LOSSES IN SLOT PORTION OF ROEBEL BARS - ERRORS ANALYSIS

摘要

This work deals with the additional losses minimization in the Roebel bar windings of high power synchronous generators. In order to solve this problem, in the paper is presented a strips-method that provides a high accuracy estimation of the elementary currents through the strand conductors. According to this method, the cross section of each strand in N parallel-strips with the slot basis was divided, so that the strip-current density could be considered as a constant. The aim of the paper is to analyze the computing-method errors and the influence of the strips number on these errors.