.Spot.AC1_DC.Machines.DCpar

Information

The field (stator) winding and armature (rotor) winding are parallel-connected or the field winding has a separate excitation source.
Contains in general compensation and commutation poles.
The parameter values l_q and r_q have to be interpreted differently for machines without and with compensation and commutation poles.

  - without:

  r_q = r_aq     resistance armature
  l_q = l_aq     inductance armature

  - with:

  r_q = r_aq + r_fq                    resistance armature plus compensation poles
  l_q = (l_aq - l_mq) + (l_fq - l_mq)  stray inductance of armature plus
                                       stray inductance of compensation poles

For pu input refer to the nominal (electrical) angular machine velocity pp*w_nom and use

  L_base = R_base/(pp*w_nom)

Determination of the mutual inductance L_md.
L_md depends on the winding ratio between armature and field winding

  L_md = (L_fd - Lsig_fd)*(n_a/n_f)

  L_md = R_fd/w_el_lim)*(V_nom/Vf_nom)

with

  V_nom       armature nominal voltage
  Vf_nom      field nominal voltage
  w_el_lim = pp*w_nom/(1 - R_q*I_nom/V_nom)  no-load angular velocity (electrical)