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
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