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WOLFRAM SYSTEM MODELER

DCSE_Start

Test example: DC with serial excitation starting with voltage ramp

Diagram

Wolfram Language

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SystemModel["Modelica.Electrical.Machines.Examples.DCMachines.DCSE_Start"]

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Information

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

Test example: Series excited DC machine started with a series resistor
At constant source voltage, a series resistor limiting the armature current, is reduced according to a ramp, causing the DC machine to start, and accelerating inertias against load torque quadratic dependent on speed, finally reaching nominal speed.
Simulate for 2 seconds and plot (versus time):

dcse.ia: armature current
dcse.wMechanical: motor's speed
dcse.tauElectrical: motor's torque

Default machine parameters of model DC_SeriesExcited are used.

Parameters (7)

Va	Value: 100 Type: Voltage (V) Description: Actual armature voltage
tStart	Value: 0.1 Type: Time (s) Description: Start of resistance ramp
tRamp	Value: 0.9 Type: Time (s) Description: Resistance ramp
TLoad	Value: 63.66 Type: Torque (N⋅m) Description: Nominal load torque
wLoad	Value: 1410 * 2 * Modelica.Constants.pi / 60 Type: AngularVelocity (rad/s) Description: Nominal load speed
JLoad	Value: 0.15 Type: Inertia (kg⋅m²) Description: Load's moment of inertia
dcseData	Value: Type: DcSeriesExcitedData Description: DC machine data

Components (8)

	dcse	Type: DC_SeriesExcited Description: Series excited linear DC machine
	ramp	Type: Ramp Description: Generate ramp signal
	constantVoltage	Type: ConstantVoltage Description: Source for constant voltage
	ground	Type: Ground Description: Ground node
	loadInertia	Type: Inertia Description: 1D-rotational component with inertia
	quadraticLoadTorque	Type: QuadraticSpeedDependentTorque Description: Quadratic dependency of torque versus speed
	variableResistor	Type: VariableResistor Description: Ideal linear electrical resistor with variable resistance
	dcseData	Type: DcSeriesExcitedData Description: DC machine data