A Method For Estimating The Sinusoidal Iron Losses Of A Transformer From Measurements Made With Distroted Voltage Waveforms

A method for estimating the sinusoidal iron losses of a transformer from measurements made under highly distorted voltage waveform conditions is proposed. No assumption of the hysteresis/eddy current loss division within the transformer is required. A maximum discrepancy of 2% between the corrected and actual sinusoidal measurements was obtained during the testing of a 50 kVA, 2400 V single phase transformer with voltage waveforts containing six zero crossings per period.