Question

A power transformer has a core material with hysteresis coefficient of 120 J/m3. Its volume is 8000 cm3 and the maximum flux density is 1.1 T. Find the hysteresis loss if the frequency of the supply is 50 Hz.

Answer 1

Power loss

$P_n=\eta B^{1.6}fV$

$$P_n=120\times1.1^{1.6}\times50\times8000\times10^{-6}$$

$P_n=55.90$ J