This study presents an analysis of the harmonic content on the dc-link (battery) side in electric drives with permanent-magnet synchronous machines (PMSMs) adopting fractional-slot concentrated windings (FSCWs) which can have a significant harmonic content. An analytical expression for predicting the ripple content in the dc-link (battery) current utilising data from a two-dimensional finite element method (2D-FEM) based model is presented and found to be in good agreement with corresponding experimental results. The FEM model is also used to demonstrate that the resulting harmonic content in the phase currents when operating at speeds well above the bandwidth of a conventional proportional + integral type controller can result in a substantial increase in magnet losses. Finally, a previously reported, experimentally evaluated model of an automotive traction battery and the associated battery cable is combined with an implemented model of the FSCW-PMSM (utilising data from the 2D-FEM model), converter and control to predict the resulting harmonic content in the battery current. The presented methods can be utilised when analysing the impact of harmonics on both the ac and dc sides of an automotive electric drive system.
Dc-link and machine design considerations for resonant controllers adopted in automotive PMSM drives
IET Electrical Systems in Transportation ; 10 , 1 ; 75-80
2019-10-15
6 pages
Article (Journal)
Electronic Resource
English
analytical expression , permanent magnet machines , automotive traction battery , automotive electrics , phase currents , two-dimensional finite element method , permanent magnet motors , magnet losses , eddy current losses , corresponding experimental results , conventional proportional + integral type controller , electric drives , associated battery cable , significant harmonic content , dc sides , permanent-magnet synchronous machines , resulting harmonic content , 2D-FEM model , traction , dc-link side , machine windings , automotive electric drive system , automotive PMSM drives , machine design considerations , fractional-slot concentrated windings , ripple content , synchronous motors , resonant controllers , finite element analysis , dc-link current utilising data , synchronous motor drives , synchronous machines , battery current
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