IMS_Start

Starting of induction machine with slip rings

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 induction machine with sliprings. The machine starts from standstill, accelerating inertias against load torque quadratic dependent on speed, using a starting resistance. At time tRheostat external rotor resistance is shortened, finally reaching nominal speed.

Simulate for 1.5 seconds and plot (versus time):

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

Default machine parameters are used.

Parameters (11)

m	Value: 3 Type: Integer Description: Number of stator phases
mr	Value: 3 Type: Integer Description: Number of rotor phases
VsNominal	Value: 100 Type: Voltage (V) Description: Nominal RMS voltage per phase
fNominal	Value: ims.fsNominal Type: Frequency (Hz) Description: Nominal frequency
tOn	Value: 0.1 Type: Time (s) Description: Start time of machine
RStart	Value: 0.16 / imsData.turnsRatio ^ 2 Type: Resistance (Ω) Description: Starting resistance
tRheostat	Value: 1.0 Type: Time (s) Description: Time of shortening the rheostat
T_Load	Value: 161.4 Type: Torque (N·m) Description: Nominal load torque
w_Load	Value: Modelica.Units.Conversions.from_rpm(1440.45) Type: AngularVelocity (rad/s) Description: Nominal load speed
J_Load	Value: 0.29 Type: Inertia (kg·m²) Description: Load inertia
imsData	Value: Type: IM_SlipRingData 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 (29)

	ground	Type: Ground
	star	Type: Star
	sineVoltage	Type: SineVoltage
	idealCloser	Type: IdealClosingSwitch
	booleanStep	Type: BooleanStep[m]
	currentQuasiRMSSensor	Type: CurrentQuasiRMSSensor
	terminalBoxM	Type: MultiTerminalBox
	terminalBoxQS	Type: MultiTerminalBox
	ims	Type: IM_SlipRing
	imsQS	Type: IM_SlipRing
	rheostatM	Type: SwitchedRheostat
	rheostatQS	Type: SwitchedRheostat
	loadInertia	Type: Inertia
	loadInertiaQS	Type: Inertia
	quadraticLoadTorque	Type: QuadraticSpeedDependentTorque
	quadraticLoadTorqueQS	Type: QuadraticSpeedDependentTorque
	imsData	Type: IM_SlipRingData Description: Induction machine data
	voltageSourceQS	Type: VoltageSource
	starQS	Type: Star
	groundQS	Type: Ground
	powerSensorQS	Type: PowerSensor
	currentQuasiRMSSensorQS	Type: CurrentQuasiRMSSensor
	idealCloserQS	Type: IdealClosingSwitch
	booleanStepQS	Type: BooleanStep[m]
	powerSensor	Type: PowerSensor
	starMachineQS	Type: Star
	groundMachineQS	Type: Ground
	starMachine	Type: Star
	groundMachine	Type: Ground