**7. Conclusions**

In this paper, an accurate measurement procedure for the control algorithm's impact on the electrical drive's efficiency has been addressed and discussed. For this purpose, an extended experimental investigation has been carried out on an IPMSM electric drive with the use of two different measurement equipment that presents different accuracy and, consequently, different costs. In order to validate the proposed measurement methodology, the behaviors of two different control algorithms have been simulated by changing the magnetization level of the IPMSM under test. This methodology allows estimating the power losses variations ΔΔ*P*, which represents a valuable index for the comparison between different PDS control algorithms. A first analysis of the experimental results has shown that a highly accurate and expensive measurement system is needed for the PDS classification according to the standard IEC-61800. However, further analysis of the ΔΔ*P* uncertainty has been carried out. This analysis has shown that the ΔΔ*PPDS* values are coincident for both systems, demonstrating that the ΔΔ*P* parameter results as a valuable index for the characterization of the control system since it can be measured even with low-precision and cheap measurement system.

**Author Contributions:** Conceptualization, C.N. and C.S.; methodology, C.S.; software, A.O.D.T. and C.N.; validation, G.L., C.N. and C.S.; formal analysis, C.N.; investigation, G.L. and C.N.; resources, R.M. and C.S.; data curation, C.N. and C.S.; writing—original draft preparation, M.C. and C.N.; writing—review and editing, M.C. and R.M.; visualization, M.C., C.N. and R.M.; supervision, A.O.D.T., R.A.M., R.M., C.S. and M.T.; project administration, R.A.M., R.M. and M.T. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research received no external funding.

**Acknowledgments:** This work was financially supported by PON R&I 2015–2020 "Propulsione e Sistemi Ibridi per velivoli ad ala fissa e rotante—PROSIB", CUP no:B66C18000290005, by H2020-ECSEL-2017-1-IA-two-stage "first and european sic eightinches pilot line-REACTION", by Prin 2017—Settore/Ambito di intervento: PE7 linea C—Advanced power-trains and -systems for full electric aircrafts, by PON R&I 2014-2020—AIM (Attraction and International Mobility), project AIM1851228-1 and by ARS01\_00459-PRJ-0052 ADAS+ "Sviluppo di tecnologie e sistemi avanzati per la sicurezza dell'auto mediante piattaforme ADAS".

**Conflicts of Interest:** The authors declare no conflict of interest.
