Test example: Investigate influence of losses on DCPM motor performance
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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.Modelica.Electrical.Machines.Examples.DCMachines.DCPM_withLosses