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WOLFRAM SYSTEM MODELER

DCPM_CurrentControlled

Test example: DC with permanent magnet starting with current controller

Diagram

Wolfram Language

In[1]:=

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

Out[1]:=

Information

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

Test example: Permanent magnet DC machine started with current controller
The current controller is parameterized according to absolute optimum. At time 0.1 s a reference current step with height = nominal armature current is applied, causing the DC machine to start, and accelerating inertias.
The machine is loaded by a quadratic speed dependent load torque.
Simulate for 2 seconds and plot (versus time):

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

Default machine parameters of model DC_PermanentMagnet are used.

Parameters (11)

TLoad	Value: ViNominal * dcpmData.IaNominal / dcpmData.wNominal Type: Torque (N⋅m) Description: Nominal load torque
wLoad	Value: dcpmData.wNominal Type: AngularVelocity (rad/s) Description: Nominal load torque
JLoad	Value: dcpmData.Jr Type: Inertia (kg⋅m²) Description: Load's moment of inertia
Ra	Value: Modelica.Electrical.Machines.Thermal.convertResistance(dcpmData.Ra, dcpmData.TaRef, dcpmData.alpha20a, dcpmData.TaNominal) Type: Resistance (Ω) Description: Warm armature resistance
ViNominal	Value: dcpmData.VaNominal - Ra * dcpmData.IaNominal Type: Voltage (V) Description: Nominal induced voltage
Ta	Value: dcpmData.La / Ra Type: Time (s) Description: Armature time constant
Ts	Value: 1e-3 Type: Time (s) Description: Dead time of inverter
k	Value: Ra * Ta / (2 * Ts) Type: Resistance (Ω) Description: Current controller proportional gain
Ti	Value: Ta Type: Time (s) Description: Current controller integral time constant
kPhi	Value: ViNominal / dcpmData.wNominal Type: MagneticFlux (Wb) Description: Voltage constant
dcpmData	Value: Type: DcPermanentMagnetData Description: DC machine data

Components (11)

	dcpm	Type: DC_PermanentMagnet Description: Permanent magnet DC machine
	step	Type: Step Description: Generate step signal of type Real
	signalVoltage	Type: SignalVoltage Description: Generic voltage source using the input signal as source voltage
	ground	Type: Ground Description: Ground node
	loadInertia	Type: Inertia Description: 1D-rotational component with inertia
	loadTorque	Type: QuadraticSpeedDependentTorque Description: Quadratic dependency of torque versus speed
	dcpmData	Type: DcPermanentMagnetData Description: DC machine data
	currentSensor	Type: CurrentSensor Description: Sensor to measure the current in a branch
	speedSensor	Type: SpeedSensor Description: Ideal sensor to measure the absolute flange angular velocity
	firstOrder	Type: FirstOrder Description: First order transfer function block (= 1 pole)
	PID	Type: LimPID Description: P, PI, PD, and PID controller with limited output, anti-windup compensation, setpoint weighting and optional feed-forward