Sascha - 2012-02-22

I have a suggestion for the Varistor library. AC-and Transient Analysis will fail on at least some varistor devices. This is because for some low voltages there is no associated current through the model. The solution is to raise the factor for the gyrator component and change the coresponding values in the formula. I tried this on Varistor component 20SK275, which now works fine for AC and TRansient Analysis on lower voltages,e.g. 1V.

1.st change Gyrator factor from 10000 to 1E6
2nd change formula from
D1.I1="sign(V1)*(1+Tol/100)*10^(-4+b1+b2*(log10(abs(V1)+1E-4)-4)+b3*exp(-log10(abs(V1)+1E-4)+4)+b4*exp(log10(abs(V1)+1E-4)-4))"

to

sign(V1)*(1+Tol/100)*10^(-6+b1+b2*(log10(abs(V1)+1E-6)-6)+b3*exp(-log10(abs(V1)+1E-6)+6)+b4*exp(log10(abs(V1)+1E-6)-6))

May this can be included in the varistor library . Enjoy.

Regards

Sascha