BH Curve measurement for inductor

[umesh49]

Hi,
Is anyone have in idea how i can measure BH curve of single inductor coil.I have this non-linear inductor with inductance of 500uH and resistance of 15Ohm.

Regards,
Umesh

 

[FlapJack]

I think that a BH curve is supposed to be independent of inductance. Ferrite's and powder core material have BH curves but they are not referenced to an inductor value.

 

[chuckey]

I would think that you need a low frequency saw tooth current source that is modulated by a high frequency sine wave. If you filter off the sinewave then as the LF current increases the inductance fall, so the level of the sine wave decreases. If you amplify the sine wave and put it through an envelope detector, this can be the Y deflection on a CRO with the sawtooth as the X deflection.
Frank

 

[srizbf]

Hi,
Is anyone have in idea how i can measure BH curve of single inductor coil.I have this non-linear inductor with inductance of 500uH and resistance of 15Ohm.

Regards,
Umesh

500uh , 150ohm indicates a thin wired inductor.
current will also be less.
for B-H curve measurement , one must have a circuit set up with oscilloscopes and current probe.
using the above , bh curve can be seen on scope.