Abstract
The authors analyze the possibility of separating total losses in electrical steel of magnetic circuits of electric machines into the following three components: losses caused by hysteresis, classical eddy currents, and anomalous eddy currents. The solution to this technical problem will make it possible to effectively design and construct electric machines with magnetic cores having low magnetic losses. Such separation is associated with time-consuming measurements using special equipment, and involves large errors. The following two methods have been suggested to determine losses in steel based on the existing dependencies of the above loss components on magnetization frequency and temperature: the three-frequency method and the three-temperature method. According to these methods, the loss components are determined based on the results of three no-load experiments carried out at three frequencies or at three temperatures of electric machine cores. The results of measuring the values of active power spent for core heating were used to calculate the power of losses caused by hysteresis, classical eddy currents, and anomalous eddy currents. The results of the experiments carried out by the three-frequency and three-temperature methods agree well with each other, thus confirming the adequacy of these methods and the possibility of their use in practice. The advantages and challenges of implementing each method have been analyzed. The methods can be used to effectively minimize losses in the steel of electric machines.
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Translated from Izmeritel’naya Tekhnika, No. 9, pp. 53–58, September, 2023. Russian DOI: https://doi.org/10.32446/0368-1025it.2023-9-53-58.
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Original article submitted May 02, 2023; approved after reviewing August 31, 2023; accepted for publication September 01, 2023.
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Plotnikov, S.M., Iksil, N. Determination of loss components in the steel of magnetic circuits of electric machines. Meas Tech 66, 699–707 (2023). https://doi.org/10.1007/s11018-024-02283-4
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DOI: https://doi.org/10.1007/s11018-024-02283-4
Keywords
- Magnetic circuit (core)
- Hysteresis losses
- Eddy-current losses
- Anomalous losses
- No-load experiment
- Three-frequency method
- Three-temperature method