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 multi phase induction machine. At start time tOn a transient and a quasi static multi phase 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 (8)

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: AIM_SquirrelCageData Description: 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: AIM_SquirrelCage
	loadInertia	Type: Inertia
	quadraticLoadTorque	Type: QuadraticSpeedDependentTorque
	powerSensor	Type: PowerSensor
	loadInertiaQS	Type: Inertia
	quadraticLoadTorqueQS	Type: QuadraticSpeedDependentTorque
	imcData	Type: AIM_SquirrelCageData Description: Machine data
	imcQS	Type: IM_SquirrelCage
	groundMachineQS	Type: Ground
	starMachineQS	Type: Star
	terminalBoxQS	Type: MultiTerminalBox
	starMachine	Type: Star
	groundMachine	Type: Ground