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Title:

Accurate Rotational Speed Measurement for Determining the Mechanical Power and Efficiency of Electrical Machines

Author(s):Zihang Song, Paula Weidinger, Rolf Kumme
Year:2023
Month:September
Physikalisch-Technische Bundesanstalt
olabel_conference_name:24th International Conference on Electrical Machines and Systems (ICEMS)
Gyeongju, Korea
olabel_conference_date:31 Oct.-3 Nov. 2021
DOI:

10.7795/EMPIR.19ENG08.CA.20230831A

File URL:

Download filet3://file?uid=9262 _blank

Abstract:Accurately measuring the mechanical power of electrical machines is essential for determining their efficiency. Conventionally, the machines' rotational speed is measured over a short time interval with a high measurement uncertainty. In this paper, we propose a rotational speed determination based on the angle covered within a longer time interval. This method is shown to achieve a higher accuracy for the determination of mechanical power and total efficiency with negligible systematic effect.

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