saturation current of common mode inductor

[rahman]

How to test the saturation current of a commonmode inductor

 

[Tom Bruhns]

Put DC current through it while measuring the inductance; increase
current till the inductance drops. Or put a rectangular voltage pulse
(repetitive, if you like, but low duty cycle to allow the magnetic
field to reset between pulses) across it while measuring the current as
a function of time. Lengthen the pulse width until the current ramp
becomes nonlinear.