Core loss current in a real transformer.

[aamirrafiq]

I was recently going through electric machinery fundamentels by Stephen Chapman and noticed the graph of the core loss current. I need help in understanding the nature of the current graph plotted against time, like how its value stays constant for some fixed time then varies linearly.

 

[earlofwessex]

core loss in a transformer is made of two separate components, the eddy currents, and the hysteresis losses.

eddycurrents increase with the change in magnetic field, while hysteresis losses are dependent on the peak amplitude, and capped at the total saturation point of the core.

can you provide the graph? (or a similar one online?)