WOLFRAM SYSTEMMODELER

IMS_Start

Starting of induction machine with slip rings

Diagram

Wolfram Language

In[1]:=
SystemModel["Modelica.Magnetic.QuasiStatic.FundamentalWave.Examples.BasicMachines.InductionMachines.IMS_Start"]
Out[1]:=

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 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 (9)

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.SIunits.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: AIM_SlipRingData

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

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: AIM_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: AIM_SlipRingData

Description: 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