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WOLFRAM SYSTEM MODELER

IMC_Transformer

Test example: InductionMachineSquirrelCage transformer starting

Diagram

Wolfram Language

In[1]:=

SystemModel["Modelica.Electrical.Machines.Examples.Transformers.IMC_Transformer"]

Out[1]:=

Information

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

Test example: Induction machine with squirrel cage - transformer starting
At start time tStart1 three-phase voltage is supplied to the induction machine with squirrel cage via the transformer; the machine starts from standstill, accelerating inertias against load torque quadratic dependent on speed; at start time tStart2 the machine is fed directly from the voltage source, finally reaching nominal speed.
Simulate for 2.5 seconds and plot (versus time):

currentQuasiRMSSensor.I: stator current RMS
aimc.wMechanical: motor's speed
aimc.tauElectrical: motor's torque

Default machine parameters of model IM_SquirrelCage are used.

Parameters (9)

VNominal	Value: 100 Type: Voltage (V) Description: Nominal RMS voltage per phase
fNominal	Value: 50 Type: Frequency (Hz) Description: Nominal frequency
tStart1	Value: 0.1 Type: Time (s) Description: Start time
tStart2	Value: 2.0 Type: Time (s) Description: Start time of bypass transformer
TLoad	Value: 161.4 Type: Torque (N⋅m) Description: Nominal load torque
wLoad	Value: 1440.45 * 2 * Modelica.Constants.pi / 60 Type: AngularVelocity (rad/s) Description: Nominal load speed
JLoad	Value: 0.29 Type: Inertia (kg⋅m²) Description: Load's moment of inertia
transformerData	Value: Type: TransformerData Description: Transformer data
aimcData	Value: Type: IM_SquirrelCageData Description: Induction machine data

Components (16)

	aimc	Type: IM_SquirrelCage Description: Induction machine with squirrel cage rotor
	currentQuasiRMSSensor	Type: CurrentQuasiRMSSensor Description: Length of space phasor -> RMS current
	sineVoltage	Type: SineVoltage Description: Polyphase sine voltage source
	star	Type: Star Description: Star-connection
	ground	Type: Ground Description: Ground node
	booleanStep1	Type: BooleanStep[m] Description: Generate step signal of type Boolean
	idealCloser	Type: IdealClosingSwitch Description: Polyphase ideal closer
	transformer	Type: Yy00 Description: Transformer Yy0
	ground2	Type: Ground Description: Ground node
	transformerData	Type: TransformerData Description: Transformer data
	booleanStep2	Type: BooleanStep[m] Description: Generate step signal of type Boolean
	idealCommutingSwitch	Type: IdealCommutingSwitch Description: Polyphase ideal commuting switch
	loadInertia	Type: Inertia Description: 1D-rotational component with inertia
	quadraticLoadTorque	Type: QuadraticSpeedDependentTorque Description: Quadratic dependency of torque versus speed
	terminalBox	Type: TerminalBox Description: Terminal box Y/D-connection
	aimcData	Type: IM_SquirrelCageData Description: Induction machine data