Test example: Investigate influence of losses on DCPM motor
performance
Both motors are started with a voltage ramp applied to the
armature, causing the DC machines to start, and accelerating
inertias. Both machines are loading with a quadratic speed
dependent load torque.
The first machine dcpm1 uses default machine
parameters of model DC_PermanentMagnet, the second machine
dcpm2 is parametrized with additional losses:
|
dcpm1 |
dcpm2 |
|
| Armature voltage |
100 |
100 |
V |
| Armature current |
100 |
100 |
A |
| Inner voltage |
95.0 |
94.5 |
V |
| Nominal speed |
1425.0 |
1417.5 |
rpm |
| Armature resistance |
0.05000 |
0.03864 |
Ohm |
| Temperature coefficient |
n/a |
0.00392 |
1/K |
| Reference temperature |
n/a |
20 |
degC |
| Operation temperature |
n/a |
95 |
degC |
| Brush voltage drop |
n/a |
0.5 |
V |
| Electrical input |
10,000 |
10,000 |
W |
| Armature copper losses |
500 |
500 |
W |
| Core losses |
n/a |
200 |
W |
| Stray load losses |
n/a |
50 |
W |
| Friction losses |
n/a |
100 |
W |
| Brush losses |
n/a |
50 |
W |
| Mechanical output |
9,500 |
9,100 |
W |
| Nominal torque |
63,66 |
61,30 |
Nm |
Note: The reference values (voltage, current, speed) are already
propagated to the loss records, using the nominal operation
point.
See:
Anton Haumer, Christian Kral, Hansjörg Kapeller, Thomas Bäuml,
Johannes V. Gragger
The AdvancedMachines Library: Loss Models for Electric
Machines
Modelica 2009, 7th International Modelica Conference
Generated at 2020-06-05T21:39:08Z by OpenModelica 1.16.0~dev-442-g2e5bc9f
.Modelica.Electrical.Machines.Examples.DCMachines.DCPM_withLosses