This is the current required to produce flux in the
core. It consist of two different current component
1.
Magnetization
current, required to produced the flux in the transformer core. The following
points to be consider about magnetization current.
a.
It
is not sinusoidal because of the magnetic saturation in the transformer core
b.
After
saturation in the core small change in flux required large amount of current.
c.
The
fundamental components of the magnetization current lags the voltage applied to
the core by 90 because of purely inductive circuit.
2.
The
Core Loss current, required to overcome hysteresis and eddy current lossees
a.
core
current is non linear because of the non linear effect of hysteresis.
b.
The
fundamental component of the core-losses is in the phase of the applied voltage.