WOLFRAM SYSTEM MODELER
DC_CompareCharacteristicsTest example: Compare torque-speed characteristic of DC motors |
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Diagram
Wolfram Language
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SystemModel["Modelica.Electrical.Machines.Examples.DCMachines.DC_CompareCharacteristics"]
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Information
This information is part of the Modelica Standard Library maintained by the Modelica Association.
Test example: Compare characteristic of DC motors
The motors are started at nominal speed, then load is ramped down. Simulate for 6 seconds and plot dcxx.wMechanical (motor speed) versus dcxx.tauElectrical (motor torque).
Default machine parameters are used.
Note that the characteristics of permanent magnet and electrical excited dc machine (at nominal excitation) is identical, but speed of the series excited dc machine rises when load torque is lowered. Dynamic increase of speed is determined by the sum of inertias. Load torque of the series excited is not lowered to zero, otherwise speed would rise infinitely.
Parameters (9)
| Va |
Value: 100 Type: Voltage (V) Description: Actual armature voltage |
|---|---|
| Ve |
Value: 100 Type: Voltage (V) Description: Actual excitation voltage |
| TLoad |
Value: 63.66 Type: Torque (N⋅m) Description: Nominal load torque |
| tStart |
Value: 0.5 Type: Time (s) Description: Start of load torque ramp |
| tRamp |
Value: 5.0 Type: Time (s) Description: Load torque ramp |
| JLoad |
Value: 0.15 Type: Inertia (kg⋅m²) Description: Load's moment of inertia |
| dcpmData |
Value: Type: DcPermanentMagnetData Description: Parameters of permanent magnet dc machine |
| dceeData |
Value: Type: DcElectricalExcitedData Description: Parameters of electrical excited dc machine |
| dcseData |
Value: Type: DcSeriesExcitedData Description: Parameters of series excited dc machine |
Components (18)
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armatureVoltage |
Type: ConstantVoltage Description: Source for constant voltage |
|---|---|---|
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groundArmature |
Type: Ground Description: Ground node |
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excitationVoltage |
Type: ConstantVoltage Description: Source for constant voltage |
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groundExcitation |
Type: Ground Description: Ground node |
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dcpmData |
Type: DcPermanentMagnetData Description: Parameters of permanent magnet dc machine |
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dcpm |
Type: DC_PermanentMagnet Description: Quasi-static permanent magnet DC machine |
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loadInertia1 |
Type: Inertia Description: 1D-rotational component with inertia |
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loadTorque1 |
Type: Torque Description: Input signal acting as external torque on a flange |
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dceeData |
Type: DcElectricalExcitedData Description: Parameters of electrical excited dc machine |
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dcee |
Type: DC_ElectricalExcited Description: Quasi-static electrical shunt/separate excited linear DC machine |
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loadInertia2 |
Type: Inertia Description: 1D-rotational component with inertia |
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loadTorque2 |
Type: Torque Description: Input signal acting as external torque on a flange |
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dcseData |
Type: DcSeriesExcitedData Description: Parameters of series excited dc machine |
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dcse |
Type: DC_SeriesExcited Description: Quasi-static series excited linear DC machine |
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loadInertia3 |
Type: Inertia Description: 1D-rotational component with inertia |
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loadTorque3 |
Type: Torque Description: Input signal acting as external torque on a flange |
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ramp |
Type: Ramp Description: Generate ramp signal |
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limiter |
Type: Limiter Description: Limit the range of a signal |