.Spot.AC1_DC.Impedances.Impedance

Information

This model corresponds to AC1_DC.Inductor, but uses a different determination of the coefficients.
Instead of x and r the parameters z_abs and cos(phi) are used.

Relations:

  z = Z / R_base
  z_abs = |z|
  r = real(z) = |z|*cos(phi)          resistance
  x = imag(z) = |z|*sin(phi)          inductance pair

With

  cpl = x_m/x_s, -1 <  cpl <  1         coupling coefficient

we have

  x0 = x*(1 + cpl)/(1 - cpl)          inductance 0-component

and

  x_s = (x + x0)/2 = x/(1 - cpl)      self inductance single conductor
  x_m = (x0 - x)/2 = x*cpl/(1 - cpl)  mutual inductance

Coupling:

  cpl >  0:        positive coupling (example lines)
  cpl <  0:        negative coupling

More info see package AC1_DC.Impedances.