WOLFRAM SYSTEMMODELER

DCPM_withLosses

Test example: Investigate influence of losses on DCPM motor performance

Diagram

Wolfram Language

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SystemModel["Modelica.Electrical.Machines.Examples.DCMachines.DCPM_withLosses"]
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Information

This information is part of the Modelica Standard Library maintained by the Modelica Association.

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

Parameters (10)

Va

Value: 100

Type: Voltage (V)

Description: Actual armature voltage

tStart

Value: 0.2

Type: Time (s)

Description: Start of armature voltage ramp

tRamp

Value: 0.8

Type: Time (s)

Description: Armature voltage ramp

TLoad1

Value: 63.66

Type: Torque (N·m)

Description: Nominal load torque

wLoad1

Value: 1425 * 2 * pi / 60

Type: AngularVelocity (rad/s)

Description: Nominal load speed

TLoad2

Value: 61.30

Type: Torque (N·m)

Description: Nominal load torque

wLoad2

Value: 1417.5 * 2 * pi / 60

Type: AngularVelocity (rad/s)

Description: Nominal load speed

JLoad

Value: 0.15

Type: Inertia (kg·m²)

Description: Load's moment of inertia

dcpmData1

Value:

Type: DcPermanentMagnetData

Description:

dcpmData2

Value:

Type: DcPermanentMagnetData

Description:

Components (11)

dcpm1

Type: DC_PermanentMagnet

Description:

ramp

Type: Ramp

Description:

signalVoltage

Type: SignalVoltage

Description:

ground

Type: Ground

Description:

loadInertia1

Type: Inertia

Description:

loadTorque1

Type: QuadraticSpeedDependentTorque

Description:

dcpm2

Type: DC_PermanentMagnet

Description:

loadInertia2

Type: Inertia

Description:

loadTorque2

Type: QuadraticSpeedDependentTorque

Description:

dcpmData1

Type: DcPermanentMagnetData

Description:

dcpmData2

Type: DcPermanentMagnetData

Description: