functioni_field

Calculates complex field current

Extends from Icons.Function (Function icon).

Information

Calculates the complex field-current i_f, and outputs dif2 which is defined as follows:

  i_f   complex field-current for actual impedance-parameters
  i_f0  desired (measured) field-current at nominal voltage /_ 0deg.
  di_f = i_f - i_f0            (complex difference)
  dif2 = di_f*conjugate(di_f)  (square of absolute value of difference)

The difference dif2 is used in order to determine the coupling terms xm[2:n] by a minimum-principle.

Inputs

Type	Name	Default	Description
SIpu.Reactance	xm2_n		approximate value of xm[2:n]
Real	x_opt		additional input arguments

Outputs

Type	Name	Default	Description
Real	dif2		i_f*conjugate(i_f)
Boolean	result		true if Tsig real and convergence tol-ok