IMC_DOL

Induction machine with squirrel cage started directly on line (DOL)

Diagram

Information

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

This example compares a time transient and a quasi-static model of a polyphase induction machine. At start time tOn a transient and a quasi-static polyphase voltage source are connected to an induction machine. The machine starts from standstill, accelerating inertias against load torque quadratic dependent on speed, finally reaching nominal speed.

Simulate for 1 second and plot (versus time):

currentRMSsensor.I|currentSensorQS.abs_i[1]: (equivalent) RMS stator current
imc|imcQS.wMechanical: machine speed
imc|imcQS.tauElectrical: machine torque

Parameters (9)

m	Value: 3 Type: Integer Description: Number of phases
VsNominal	Value: 100 Type: Voltage (V) Description: Nominal RMS voltage per phase
fNominal	Value: imc.fsNominal Type: Frequency (Hz) Description: Nominal frequency
tOn	Value: 0.1 Type: Time (s) Description: Start time of machine
T_Load	Value: 161.4 Type: Torque (N·m) Description: Nominal load torque
w_Load	Value: 1440.45 * 2 * Modelica.Constants.pi / 60 Type: AngularVelocity (rad/s) Description: Nominal load speed
J_Load	Value: 0.5 Type: Inertia (kg·m²) Description: Load inertia
p	Value: 2 Type: Integer Description: Number of pole pairs
imcData	Value: Type: IM_SquirrelCageData Description: Induction machine data

Outputs (2)

Itr	Default Value: currentQuasiRMSSensor.I Type: Current (A) Description: Transient RMS current
Iqs	Default Value: currentQuasiRMSSensorQS.I Type: Current (A) Description: QS RMS current

Itr

Default Value: currentQuasiRMSSensor.I

Type: Current (A)

Description: Transient RMS current

Iqs

Default Value: currentQuasiRMSSensorQS.I

Type: Current (A)

Description: QS RMS current

Components (27)

	voltageSourceQS	Type: VoltageSource
	starQS	Type: Star
	groundQS	Type: Ground
	powerSensorQS	Type: PowerSensor
	currentQuasiRMSSensorQS	Type: CurrentQuasiRMSSensor
	idealCloserQS	Type: IdealClosingSwitch
	booleanStepQS	Type: BooleanStep[m]
	ground	Type: Ground
	star	Type: Star
	cosineVoltage	Type: CosineVoltage
	idealCloser	Type: IdealClosingSwitch
	booleanStep	Type: BooleanStep[m]
	currentQuasiRMSSensor	Type: CurrentQuasiRMSSensor
	terminalBox	Type: MultiTerminalBox
	imc	Type: IM_SquirrelCage
	loadInertia	Type: Inertia
	quadraticLoadTorque	Type: QuadraticSpeedDependentTorque
	powerSensor	Type: PowerSensor
	loadInertiaQS	Type: Inertia
	quadraticLoadTorqueQS	Type: QuadraticSpeedDependentTorque
	imcData	Type: IM_SquirrelCageData Description: Induction machine data
	imcQS	Type: IM_SquirrelCage
	groundMachineQS	Type: Ground
	starMachineQS	Type: Star
	terminalBoxQS	Type: MultiTerminalBox
	starMachine	Type: Star
	groundMachine	Type: Ground