Hi Alzie and aall the others which answered,
Alzie is nearly right with the way of explanation what I have seen, but
it is not possible to describe the behaviour by S?ICE just with a
parallel resistor.
On that page under B you will
find a real measured Z-Plot in vetorial notation ( with the phase on the
right side ) and the initial measurement of inductivity of 20uH. The
core is lossy in the range of the plot ( Amidon Mat 43) and the model
with jus the parallel resistance does NOT do enough or right. So my idea
was to define the permeability in its complex form and give a table of
values or artificaly evaluated polynom with permeabilty factors over
frequency.
Is it possible to give LTSPICE a value by a formula expression based on
a table ( interpolation???) ?
Thanks in advance
Herbert
Am 09.07.2013 14:48, schrieb alzie:
Hi Herbert
On 07/09/2013 12:45 AM, sawreyrw wrote:
dows anybody have an idea for modelling a inductance with a
permeability in dependency of frequency ??
A simple model would be an inductor in parallel with a resistor.
Most ferrous cores behave well up to a cross over frequency at which
the perm drops and they become very lossy.
The loss dominates above that freq and
the inductor looks pretty much like a resistor that
is flat with freq.
--
AC2CL
I do not think there is any thrill that
can go through the human heart like that felt by the inventor as
he sees some creation of the brain unfolding to success...
Such emotions make a man forget food, sleep, friends, love, everything.
- Nikola Tesla
[Non-text portions of this message have been removed]
