WOLFRAM SYSTEMMODELER

IMC_DOL

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

Diagram

Wolfram Language

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SystemModel["Modelica.Magnetic.QuasiStatic.FundamentalWave.Examples.BasicMachines.InductionMachines.IMC_DOL"]
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Information

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

Direct on line (DOL) starting of an induction machine with squirrel cage

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 (9)

m

Value: 5

Type: Integer

Description: Number of phases

VsNominal

Value: 100

Type: Voltage (V)

Description: Nominal RMS voltage per phase

fNominal

Value: 50

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

Components (25)

voltageSourceQS

Type: VoltageSource

Description:

starQS

Type: Star

Description:

groundQS

Type: Ground

Description:

powerSensorQS

Type: PowerSensor

Description:

currentQuasiRMSSensorQS

Type: CurrentQuasiRMSSensor

Description:

idealCloserQS

Type: IdealClosingSwitch

Description:

booleanStepQS

Type: BooleanStep[m]

Description:

ground

Type: Ground

Description:

star

Type: Star

Description:

cosineVoltage

Type: CosineVoltage

Description:

idealCloser

Type: IdealClosingSwitch

Description:

booleanStep

Type: BooleanStep[m]

Description:

currentQuasiRMSSensor

Type: CurrentQuasiRMSSensor

Description:

terminalBoxM

Type: TerminalBox

Description:

imc

Type: AIM_SquirrelCage

Description:

loadInertia

Type: Inertia

Description:

quadraticLoadTorque

Type: QuadraticSpeedDependentTorque

Description:

powerSensor

Type: PowerSensor

Description:

loadInertiaQS

Type: Inertia

Description:

quadraticLoadTorqueQS

Type: QuadraticSpeedDependentTorque

Description:

imcData

Type: AIM_SquirrelCageData

Description: Machine data

imcQS

Type: IM_SquirrelCage

Description:

groundMachineQS

Type: Ground

Description:

starMachineQS

Type: Star

Description:

terminalBoxQS

Type: MultiTerminalBox

Description: