A PROCEDURE FOR SPECIFIC MAGNETIC LOSSES CALCULATION IN FeSi ELECTRICAL SHEETS
Journal Title: ANALELE UNIVERSITATII DIN CRAIOVA - Seria Inginerie electrica - Year 2010, Vol 34, Issue 34
Abstract
The losses in the magnetic circuit of electrical machines produce machine heating and reduce efficiency with implications in lifetime and energy save. The factors that affect the losses in magnetic circuits of electrical machines are: material performances, geometry of magnetic circuit, load characteristics and working frequency. Taking into account all these factors, the paper analyzes the magnetic losses in the FeSi electrical sheets used in magnetic circuit of electrical machines construction and proposes a new and fast mathematical model for specific magnetic losses calculation in a specific range of magnetization. A procedure of losses division for hysteresis losses, eddy currents losses and additional magnetic losses is proposed, resorting to a minimum of experimental data. The proposed model has as advantage rapidity of magnetic losses determination due to the use of variable coefficients involved in hysteresis losses determination, reported to magnetization frequency and magnetic induction. Validation model was made over a frequency range of 10 Hz to 200 Hz and magnetic induction from 0.1 T to 1.5 T, with errors compared with those of classical model.
Authors and Affiliations
Marius-Daniel CALIN, Carmen LUNGOCI, Elena HELEREA
Keywords
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