The paper discusses metrology of power loss in soft magnetic materials with focus on a ring sample measurement. Loss data at 1 T for 50 Hz and at 50 mT for 5 kHz is shown collected with a newly developed experimental setup. We carry out a comprehensive analysis of the measurement uncertainty (MU). Ten different parameters contribute to the total MU budget. Relative MUs ≤ 0.2 % for confidence interval k = 2 are obtained in the measurements, which is well below the IEC 60404-6 standard requirements.

Magnetic steel is utilized in electric motors/generators and transformers, where the cyclic magnetization of the material results in notable energy losses. With the increasing emphasis on boosting energy efficiency, there is a demand for more effective evaluation methods to quantify these losses in challenging operational conditions involving high frequency, elevated temperatures, and also distorted flux conditions. This investigation seeks to assess the accuracy of techniques employed for measuring losses in thin steel sheets, as well as in nanocrystalline and ferrite materials. The evaluation extends beyond the established IEC 60404 standards by broadening the ranges of induction, frequency, and temperature. These measurements play a pivotal role in advancing magnetic materials and power electronics devices, facilitating the development of materials with enhanced energy performance in practical operating scenarios. Consequently, this supports the application of the Ecodesign Directive 2009/125/EC and contributes to the attainment of objectives outlined in the United Nations 2030 Agenda for Sustainable Development.