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)Use the same base-values also for excitation parameters.
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)It can be determined in several ways,
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)