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MAGNETIC.LIB
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1988-11-01
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3KB
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* Library of magnetic core model parameters
* This is a reduced version of MicroSim's magnetic core library.
* You are welcome to make as many copies of it as you find convenient.
* Release date: November 1988
* The parameters in this model library were derived from the data sheets for
* each core. The Jiles-Atherton magnetics model is described in:
*
* Theory of Ferromagnetic Hysteresis, by D C Jiles and D L Atherton,
* Journal of Magnetism and Magnetic Materials, vol 61 (1986) pp 48-60
*
* Model parameters for ferrite material (Ferroxcube 3C8) were obtained by
* trial simulations, using the B-H curves from the manufacturer's catalog.
* Then, the library was compiled from the data sheets for each core geometry.
* Notice that only the geometric values change once a material is
* characterized.
* Example use: K2 L2 .99 K1409PL_3C8
* Notes:
* 1) Using a K device (formerly only for mutual coupling) with a model
* reference changes the meaning of the L device: the inductance value
* becomes the number of turns for the winding.
* 2) K devices can "get away" with specifying only one inductor, as in the
* example above, to simulate power inductors.
* Example circuit file:
*+-----------------------------------------------------------------------------
*|Demonstration of power inductor B-H curve
*|
*|* To view results with Probe (B-H curve):
*|* 1) Add Trace for B(K1)
*|* 2) set X-axis variable to H(K1)
*|*
*|* Probe x-axis unit is Oersted
*|* Probe y-axis unit is Gauss
*|*
*|.tran .1 4
*|igen0 0 1 sin(0 .1amp 1Hz 0) ; Generator: starts with 0.1 amp sinewave, then
*|igen1 0 1 sin(0 .1amp 1Hz 1) ; +0.1 amps, starting at 1 second
*|igen2 0 1 sin(0 .2amp 1Hz 2) ; +0.2 amps, starting at 2 seconds
*|igen3 0 1 sin(0 .8amp 1Hz 3) ; +0.4 amps, starting at 3 seconds
*|RL 1 0 1ohm ; generator source resistance
*|L1 1 0 20 ; inductor with 20 turns
*|K1 L1 .9999 K528T500_3C8 ; Ferroxcube torroid core
*|.model K528T500_3C8 Core(MS=420E3 ALPHA=2E-5 A=26 K=18 C=1.05
*|+ AREA=1.17 PATH=8.49)
*|.options itl5=0
*|.probe
*|.end
*+-----------------------------------------------------------------------------
*** Ferroxcube pot cores: 3C8 material
.model K3019PL_3C8 Core(Ms=420E3 Alpha=2E-5 A=26 K=18 C=1.05
+ Area=1.38 Path=4.52)
*** Ferroxcube square cores: 3C8 material
.model KRM8PL_3C8 Core(Ms=420E3 Alpha=2E-5 A=26 K=18 C=1.05
+ Area=.630 Path=3.84)
*** Ferroxcube toroid cores: 3C8 material
.model K502T300_3C8 Core(Ms=420E3 Alpha=2E-5 A=26 K=18 C=1.05
+ Area=.371 Path=7.32)
*** end of library file