Kerim
Member
I guess those who use the LTspice simulator are familiar with the three parameters of the non-linear inductor model (by John Chan) :
Bs, saturation flux.
Br, saturation remanent flux.
Hc, coercive force
Let us suppose we have an inductor whose core is iron (actually, the primary or the secondary of a transformer rated to a few KWs). Its iron laminations are of unknown type (shape E & I).
How, in your opinion, measuring its 3 parameters (at least approximately) could be done, speaking practically, by using a scope?
Thank you.
Kerim
Note:
Lately, I found a rather simple way to measure these 3 parameters by plotting first the voltage and current (50 Hz) of the inductor under test on a scope. Then, I apply 3 formulas, one for each. The mechanical parameters are supposed being known.
But I am afraid that perhaps I just re-invented the wheel![Frown :( :(](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Bs, saturation flux.
Br, saturation remanent flux.
Hc, coercive force
Let us suppose we have an inductor whose core is iron (actually, the primary or the secondary of a transformer rated to a few KWs). Its iron laminations are of unknown type (shape E & I).
How, in your opinion, measuring its 3 parameters (at least approximately) could be done, speaking practically, by using a scope?
Thank you.
Kerim
Note:
Lately, I found a rather simple way to measure these 3 parameters by plotting first the voltage and current (50 Hz) of the inductor under test on a scope. Then, I apply 3 formulas, one for each. The mechanical parameters are supposed being known.
But I am afraid that perhaps I just re-invented the wheel