WOLFRAM SYSTEMMODELER

AIMC_withLosses

Test example: AsynchronousInductionMachineSquirrelCage with losses

Diagram

Wolfram Language

In[1]:=
Click for copyable input
SystemModel["Modelica.Electrical.Machines.Examples.AsynchronousInductionMachines.AIMC_withLosses"]
Out[1]:=

Information

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

Test example: Asynchronous induction machine with squirrel cage - characteristics with losses

  • Simulate for 5 seconds: The machine is started at nominal speed, flux is build up in the machine.
  • Continue the simulation for additional 5 seconds: Subsequently a load ramp is applied.
  • Compare by plotting versus Pmech:
Current I_sim I_meas
Speed w_sim w_meas
Power factor pf_sim pf_meas
Efficiency eff_sim eff_meas

Machine parameters are taken from a standard 18.5 kW 400 V 50 Hz motor, simulation results are compared with measurements.

Nominal stator current 32.85 A
Power factor 0.898
Speed 1462.4 rpm
Electrical input 20,443.95 W
Stator copper losses 770.13 W
Stator core losses 410.00 W
Rotor copper losses 481.60 W
Stray load losses 102.22 W
Friction losses 180.00 W
Mechanical output 18,500.00 W
Efficiency 90.49 %
Nominal torque 120.79 Nm

Stator resistance per phase 0.56 Ω
Temperature coefficient copper
Reference temperature 20 °C
Operation temperature 90 °C
Stator leakage reactance at 50 Hz 1.52 Ω
Main field reactance at 50 Hz 66.40 Ω
Rotor leakage reactance at 50 Hz 2.31 Ω
Rotor resistance per phase 0.42 Ω
Temperature coefficient aluminium
Reference temperature 20 °C
Operation temperature 90 °C

See:
Anton Haumer, Christian Kral, Hansjörg Kapeller, Thomas Bäuml, Johannes V. Gragger
The AdvancedMachines Library: Loss Models for Electric Machines
Modelica 2009, 7th International Modelica Conference

Parameters (14)

PNominal

Value: 18500

Type: Power (W)

Description: Nominal output

VNominal

Value: 400

Type: Voltage (V)

Description: Nominal RMS voltage

INominal

Value: 32.85

Type: Current (A)

Description: Nominal RMS current

pfNominal

Value: 0.898

Type: Real

Description: Nominal power factor

fNominal

Value: 50

Type: Frequency (Hz)

Description: Nominal frequency

wNominal

Value: from_rpm(1462.5)

Type: AngularVelocity (rad/s)

Description: Nominal speed

TNominal

Value: PNominal / wNominal

Type: Torque (N·m)

Description: Nominal torque

TempNominal

Value: from_degC(90)

Type: Temperature (K)

Description: Nominal temperature

Ptable

Value: {1E-6, 1845, 3549, 5325, 7521, 9372, 11010, 12930, 14950, 16360, 18500, 18560, 20180, 22170}

Type: Real[:]

Description:

Itable

Value: {11.0, 11.20, 12.27, 13.87, 16.41, 18.78, 21.07, 23.92, 27.05, 29.40, 32.85, 32.95, 35.92, 39.35}

Type: Real[:]

Description:

ntable

Value: {1500, 1496, 1493, 1490, 1486, 1482, 1479, 1475, 1471, 1467, 1462, 1462, 1458, 1453}

Type: Real[:]

Description:

ctable

Value: {0.085, 0.327, 0.506, 0.636, 0.741, 0.797, 0.831, 0.857, 0.875, 0.887, 0.896, 0.896, 0.902, 0.906}

Type: Real[:]

Description:

etable

Value: {0, 0.7250, 0.8268, 0.8698, 0.8929, 0.9028, 0.9064, 0.9088, 0.9089, 0.9070, 0.9044, 0.9043, 0.9008, 0.8972}

Type: Real[:]

Description:

aimcData

Value:

Type: AIM_SquirrelCageData

Description:

Components (16)

aimc

Type: AIM_SquirrelCage

Description:

terminalBox

Type: TerminalBox

Description:

electricalPowerSensor

Type: ElectricalPowerSensor

Description:

currentQuasiRMSSensor

Type: CurrentQuasiRMSSensor

Description:

sineVoltage

Type: SineVoltage

Description:

star

Type: Star

Description:

ground

Type: Ground

Description:

powerSensor

Type: PowerSensor

Description:

loadInertia

Type: Inertia

Description:

torque

Type: Torque

Description:

gain

Type: Gain

Description:

PI

Type: PI

Description:

feedback

Type: Feedback

Description:

ramp

Type: Ramp

Description:

combiTable1Ds

Type: CombiTable1Ds

Description:

aimcData

Type: AIM_SquirrelCageData

Description: