.Spot.Semiconductors.Ideal.SCparameter

Information

The small parameters epsR and epsG are given in dimensionless units. This allows to work with deault values also in cases where the exact semiconductor data are missing. A resonable (approximate) value for Z_nom is needed for scaling.

  epsR = (dV/dI)/Z_nom at I_nom
  Z_nom = V_nom/I_nom

Thermal losses are proportional to the forward drop voltage V, which may depend on temperature.
The temperature dependence is given by

  V(T) = Vf*(1 + cT[1]*(T - T0) + cT[2]*(T - T0)^2 + ...)

where Vf denotes the parameter value. With input cT empty, no temperature dependence of losses is calculated.

The switching losses are approximated by

  h = hSw_nom*v*i/S_nom,   S_nom = V_nom*I_nom

where q denotes the dissipated heat per switching operation at nominal voltage and current, averaged over 'on' and 'off'.
A generalisation to powers of i and v is straightforward.

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