Systematic uncertainty analysis of power loss measurements in electrical steel sheets to 5 kHz

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.