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Hello,
I have some measures of a load that R depend of frequency. I have a simple measurement table giving R vs freq.
I there any way to create a model for this load ? At this point, we are considering the load is purely resistive.
As a next step, I will also characterize the phase (load is not exactly resistive). Any way to modelize that ?
Frequency range is DC-100kHz.
Any tips appreciated
Thanks
1
The construct, Bn R=f(...), isn't well documented or explained in the LTspice Wiki. I did some testing with a simple resistor divider circuit and found a syntax that worked using the frequency related expression. I learned that the initial resistance value is divided by the magnitude value in the ordered list of points at its frequency. This does create a tabular frequency dependent resistor but between points the interpolation is not linear (testing over one decade). At DC the value is 10K.
TEST OF THE RESISTIVE FEATURE OF THE B PART
V1 1 0 1 AC=10
R1 1 2 10K
B1 2 0 R=10K
+ mag Freq = 1K,1,0 2K,2,0 4K,5,0 8K,3,0 10K,1,0 20K,0.5,0 40K,0.2,0 80K,0.333,0 100K,1,0
.AC DEC 1000 1K 100K
.END
PLOT OF RESISTANCE VERSUS FREQUENCY
1
The construct, Bn R=f(...), isn't well documented or explained in the LTspice Wiki. I did some testing with a simple resistor divider circuit and found a syntax that worked using the frequency related expression. I learned that the initial resistance value is divided by the magnitude value in the ordered list of points at its frequency. This does create a tabular frequency dependent resistor but between points the interpolation is not linear (testing over one decade). At DC the value is 10K.
TEST OF THE RESISTIVE FEATURE OF THE B PART
V1 1 0 1 AC=10
R1 1 2 10K
B1 2 0 R=10K
+ mag Freq = 1K,1,0 2K,2,0 4K,5,0 8K,3,0 10K,1,0 20K,0.5,0 40K,0.2,0 80K,0.333,0 100K,1,0
.AC DEC 1000 1K 100K
.END
PLOT OF RESISTANCE VERSUS FREQUENCY
