modelDCpar
DC machine parallel excited
Extends from Partials.DCparBase (DC machine parallel excited, parameter).
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)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,
- using the above formula
- using a constant K_E (back EMF)
- solving the steady-state machine equations for L_md at nominal conditions. This method leads to
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)
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Integer | pp (from DCBase) | 2 | pole-pair number |
| Data | par (from DCparBase) | machine parameters | |
| Initialization | |||
| Types.Dynamics | dynType (from DCBase) | system.dynType | transient or steady-state model |
| PS.Voltage | v_start (from DCBase) | 0 | start value of voltage drop |
| PS.Current | i_start (from DCBase) | 0 | start value of current |
| SI.Angle | phi_el_start (from DCBase) | 0 | initial rotor angle electric |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Ports.TwoPin_p | term (from Port_p) | positive terminal | |
| Interfaces.Rotation_n | airgap (from DCBase) | electro-mechanical connection | |
| Interfaces.ThermalV_n | heat (from DCBase) | heat source port {stator, rotor} | |
| Ports.TwoPin_p | field (from DCparBase) |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| SI.Angle | phi_el (from DCBase) | rotor angle electric | |
| SI.AngularVelocity | w_el (from DCBase) | rotor angular velocity el | |
| SI.Torque | tau_el (from DCBase) | electromagnetic torque | |
| PS.Voltage | v (from DCBase) | voltage | |
| PS.Current | i (from DCBase) | current | |
| PS.Voltage | v_f (from DCparBase) | ||
| PS.Current | i_f (from DCparBase) |