WOLFRAM SYSTEMMODELER

AIMC_DOL_MultiPhase

Direct on line start of multi phase asynchronous induction machine with squirrel cage

Diagram

Wolfram Language

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SystemModel["Modelica.Magnetic.FundamentalWave.Examples.BasicMachines.AIMC_DOL_MultiPhase"]
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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 asynchronous induction machine with squirrel cage

At start time tStart voltages are supplied to the multi phase asynchronous induction machines with squirrel cage. The machines starts from standstill, accelerating inertias against load torque quadratic dependent on speed, finally reaching nominal speed. Two equivalent machines with different numbers of phases are compared and their equal behavior is demonstrated.

Simulate for 1.5 seconds and plot (versus time):

  • aimcM|M3.tauElectrical: machine torque
  • aimsM/M3.wMechanical: machine speed
  • feedback.y: zero since difference of three phase current phasor and scaled multi phase current phasor are equal

Parameters (9)

m

Value: 5

Type: Integer

Description: Number of stator 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: 0.29

Type: Inertia (kg·m²)

Description: Load inertia

p

Value: 2

Type: Integer

Description: Number of pole pairs

aimcData

Value:

Type: AIM_SquirrelCageData

Description:

Components (23)

groundM

Type: Ground

Description:

starM

Type: Star

Description:

sineVoltageM

Type: SineVoltage

Description:

idealCloserM

Type: IdealClosingSwitch

Description:

booleanStepM

Type: BooleanStep[m]

Description:

currentRMSsensorM

Type: CurrentQuasiRMSSensor

Description:

terminalBoxM

Type: TerminalBox

Description:

aimcM

Type: AIM_SquirrelCage

Description:

loadInertiaM

Type: Inertia

Description:

quadraticLoadTorqueM

Type: QuadraticSpeedDependentTorque

Description:

aimcData

Type: AIM_SquirrelCageData

Description:

ground3

Type: Ground

Description:

star3

Type: Star

Description:

sineVoltage3

Type: SineVoltage

Description:

idealCloser3

Type: IdealClosingSwitch

Description:

booleanStep3

Type: BooleanStep[m3]

Description:

currentRMSsensor3

Type: CurrentQuasiRMSSensor

Description:

terminalBox3

Type: TerminalBox

Description:

aimc3

Type: AIM_SquirrelCage

Description:

loadInertia3

Type: Inertia

Description:

quadraticLoadTorque3

Type: QuadraticSpeedDependentTorque

Description:

gain

Type: Gain

Description:

feedback

Type: Feedback

Description: