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Inductor and hysteresis
Posted Feb 2, 2010, 10:50 a.m. EST 2 Replies
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Hello everybody:
I want to study an inductor when the material core has a non-linear behaviour. Following the example of a power inductor (AC/DC module - quasi statics, electromagnetic - electric and induction currents) I've simulated a 3D inductor with a double E core and created a material with MUR as a function of B (point by point) with a constant extrapolation function at the left (linear part) and at the right (saturation part). When I change the current value the inductor also changes the inductance value as expected, but the solver diverges when it is calculating around the last point I've introduced in the MUR function, that is, it doesn't extrapolate, though I think it should. I've introduced some more points into the MUR function, but the solver is still stoping at the same point.
The questions are: Why is it happening? Does it have a solution?
I want to extract a function of the inductance versus the current, and I need some values in saturation.
Thank you very much.
I want to study an inductor when the material core has a non-linear behaviour. Following the example of a power inductor (AC/DC module - quasi statics, electromagnetic - electric and induction currents) I've simulated a 3D inductor with a double E core and created a material with MUR as a function of B (point by point) with a constant extrapolation function at the left (linear part) and at the right (saturation part). When I change the current value the inductor also changes the inductance value as expected, but the solver diverges when it is calculating around the last point I've introduced in the MUR function, that is, it doesn't extrapolate, though I think it should. I've introduced some more points into the MUR function, but the solver is still stoping at the same point.
The questions are: Why is it happening? Does it have a solution?
I want to extract a function of the inductance versus the current, and I need some values in saturation.
Thank you very much.
2 Replies Last Post Feb 9, 2010, 4:31 a.m. EST
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Posted:
1 decade ago
Hi
often a solver will hang on discontinuities, check carefully that your material properties are rather "smooth", or whatever other functions you have.
Unfortunately, your description does not ring any other "bells" by me, sometimes by looking at the sover conversion logs and graphs you get some idea how well it converges and how quick it finds its way, the culprit could be active before the final stop.
Good luck
Ivar
often a solver will hang on discontinuities, check carefully that your material properties are rather "smooth", or whatever other functions you have.
Unfortunately, your description does not ring any other "bells" by me, sometimes by looking at the sover conversion logs and graphs you get some idea how well it converges and how quick it finds its way, the culprit could be active before the final stop.
Good luck
Ivar
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Posted:
1 decade ago
Thank you for the advice, that could be the problem. I'll try to smooth the function.
Lidia.
Lidia.