Optimization of PMSMs Considering Multi-Harmonic Current Waveforms: Theory, Design Aspects, and Experimental Verification

This article is about investigating the potential of multi-harmonic design permanent magnet synchronous machines. Thereby, refers to temporal periodic characteristics linked fluxes and currents stator phases in order ensure high-efficient operation with very low torque ripple. At first, a suitable model allowing for evaluation derived. Consequently, an interior-rotor IPM machine studied. In have fair comparison conventional PMSMs featuring sinusoidal currents, optimization scenario defined where same outer dimensions as well copper volume both variants are considered. The use multiple current harmonics requires dedicated strategy evaluating designs, $dq$ -grid analysis cannot be utilized. introduced approach applied results illustrated. Prototypes were manufactured designs subsequently evaluated through experiments. A valuable lesson learned during practical implementation regarding rotor angle determination highlighted. Measurement reveal that adding more degrees freedom terms can give significant improvements performance measures efficiency particularly holds if already considered throughout process, rather than only at post-processing stage.