Test examples of asynchronous induction machines
Information
This package contains test examples of asynchronous induction machines.
Extends from Modelica.Icons.ExamplesPackage (Icon for packages containing runnable examples).
Package Content
| Name | Description |
|---|
 AIMC_DOL
| Test example: AsynchronousInductionMachineSquirrelCage direct-on-line |
| AIMC_YD
| Test example: AsynchronousInductionMachineSquirrelCage Y-D |
| AIMC_Transformer
| Test example: AsynchronousInductionMachineSquirrelCage transformer starting |
| AIMS_Start
| Test example: AsynchronousInductionMachineSlipRing |
| AIMC_Inverter
| Test example: AsynchronousInductionMachineSquirrelCage with inverter |
| AIMC_Steinmetz
| AsynchronousInductionMachineSquirrelCage Steinmetz-connection |
| AIMC_withLosses
| Test example: AsynchronousInductionMachineSquirrelCage with losses |
| AIMC_Initialize
| Test example: Steady-State Initialization of AsynchronousInductionMachineSquirrelCage |
Test example: AsynchronousInductionMachineSquirrelCage direct-on-line
Information
Test example: Asynchronous induction machine with squirrel cage - direct on line starting
At start time tStart three phase voltage is supplied to the asynchronous induction machine with squirrel cage;
the machine starts from standstill, accelerating inertias against load torque quadratic dependent on speed, finally reaching nominal speed.
Simulate for 1.5 seconds and plot (versus time):
- currentQuasiRMSSensor.I: stator current RMS
- aimc.wMechanical: motor's speed
- aimc.tauElectrical: motor's torque
Default machine parameters of model AIM_SquirrelCage are used.
Extends from Modelica.Icons.Example (Icon for runnable examples).
Parameters
| Name | Description |
|---|
| VNominal | Nominal RMS voltage per phase [V] |
| fNominal | Nominal frequency [Hz] |
| tStart1 | Start time [s] |
| TLoad | Nominal load torque [N.m] |
| wLoad | Nominal load speed [rad/s] |
| JLoad | Load's moment of inertia [kg.m2] |
| aimcData | |
Test example: AsynchronousInductionMachineSquirrelCage Y-D
Information
Test example: Asynchronous induction machine with squirrel cage - Y-D starting
At start time tStart three phase voltage is supplied to the asynchronous induction machine with squirrel cage, first star-connected, then delta-connected; the machine starts from standstill, accelerating inertias against load torque quadratic dependent on speed, finally reaching nominal speed.
Simulate for 2.5 seconds and plot (versus time):
- currentQuasiRMSSensor.I: stator current RMS
- aimc.wMechanical: motor's speed
- aimc.tauElectrical: motor's torque
Default machine parameters of model AIM_SquirrelCage are used.
Extends from Modelica.Icons.Example (Icon for runnable examples).
Parameters
| Name | Description |
|---|
| VNominal | Nominal RMS voltage per phase [V] |
| fNominal | Nominal frequency [Hz] |
| tStart1 | Start time [s] |
| tStart2 | Start time from Y to D [s] |
| TLoad | Nominal load torque [N.m] |
| wLoad | Nominal load speed [rad/s] |
| JLoad | Load's moment of inertia [kg.m2] |
| aimcData | |
Test example: AsynchronousInductionMachineSquirrelCage transformer starting
Information
Test example: Asynchronous induction machine with squirrel cage - transformer starting
At start time tStart1 three phase voltage is supplied to the asynchronous induction machine with squirrel cage via the transformer;
the machine starts from standstill, accelerating inertias against load torque quadratic dependent on speed;
at start time tStart2 the machine is fed directly from the voltage source, finally reaching nominal speed.
Simulate for 2.5 seconds and plot (versus time):
- currentQuasiRMSSensor.I: stator current RMS
- aimc.wMechanical: motor's speed
- aimc.tauElectrical: motor's torque
Default machine parameters of model AIM_SquirrelCage are used.
Extends from Modelica.Icons.Example (Icon for runnable examples).
Parameters
| Name | Description |
|---|
| VNominal | Nominal RMS voltage per phase [V] |
| fNominal | Nominal frequency [Hz] |
| tStart1 | Start time [s] |
| tStart2 | Start time of bypass transformer [s] |
| TLoad | Nominal load torque [N.m] |
| wLoad | Nominal load speed [rad/s] |
| JLoad | Load's moment of inertia [kg.m2] |
| transformerData | |
| aimcData | |
Test example: AsynchronousInductionMachineSlipRing
Information
Test example: Asynchronous induction machine with slipring rotor - resistance starting
At start time tStart1 three phase voltage is supplied to the asynchronous induction machine with sliprings;
the machine starts from standstill, accelerating inertias against load torque quadratic dependent on speed,
using a starting resistance. At time tStart2 external rotor resistance is shortened, finally reaching nominal speed.
Simulate for 1.5 seconds and plot (versus time):
- currentQuasiRMSSensor.I: stator current RMS
- aims.wMechanical: motor's speed
- aims.tauElectrical: motor's torque
Default machine parameters of model AIM_SlipRing are used.
Extends from Modelica.Icons.Example (Icon for runnable examples).
Parameters
| Name | Description |
|---|
| VNominal | Nominal RMS voltage per phase [V] |
| fNominal | Nominal frequency [Hz] |
| tStart1 | Start time [s] |
| Rstart | Starting resistance [Ohm] |
| tStart2 | Start time of shorting starting resistance [s] |
| TLoad | Nominal load torque [N.m] |
| wLoad | Nominal load speed [rad/s] |
| JLoad | Load's moment of inertia [kg.m2] |
| aimsData | |
Test example: AsynchronousInductionMachineSquirrelCage with inverter
Information
Test example: Asynchronous induction machine with squirrel cage fed by an ideal inverter
An ideal frequency inverter is modeled by using a VfController and a three-phase SignalVoltage.
Frequency is raised by a ramp, causing the asynchronous induction machine with squirrel cage to start,
and accelerating inertias.
At time tStep a load step is applied.
Simulate for 1.5 seconds and plot (versus time):
- currentQuasiRMSSensor.I: stator current RMS
- aimc.wMechanical: motor's speed
- aimc.tauElectrical: motor's torque
Default machine parameters of model AIM_SquirrelCage are used.
Extends from Modelica.Icons.Example (Icon for runnable examples).
Parameters
| Name | Description |
|---|
| VNominal | Nominal RMS voltage per phase [V] |
| fNominal | Nominal frequency [Hz] |
| f | Actual frequency [Hz] |
| tRamp | Frequency ramp [s] |
| TLoad | Nominal load torque [N.m] |
| tStep | Time of load torque step [s] |
| JLoad | Load's moment of inertia [kg.m2] |
| aimcData | |
AsynchronousInductionMachineSquirrelCage Steinmetz-connection
Information
Asynchronous induction machine with squirrel cage - Steinmetz-connection
At start time tStart single phase voltage is supplied to the asynchronous induction machine with squirrel cage;
the machine starts from standstill, accelerating inertias against load torque quadratic dependent on speed, finally reaching nominal speed.
Default machine parameters of model AIM_SquirrelCage are used.
Extends from Modelica.Icons.Example (Icon for runnable examples).
Parameters
| Name | Description |
|---|
| VNominal | Nominal RMS voltage per phase [V] |
| fNominal | Nominal frequency [Hz] |
| tStart1 | Start time [s] |
| Cr | Motor's running capacitor [F] |
| Cs | Motor's (additional) starting capacitor [F] |
| wSwitch | Speed for switching off the starting capacitor [rad/s] |
| TLoad | Nominal load torque [N.m] |
| wLoad | Nominal load speed [rad/s] |
| JLoad | Load's moment of inertia [kg.m2] |
| aimcData | |
Test example: AsynchronousInductionMachineSquirrelCage with losses
Information
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
Extends from Modelica.Icons.Example (Icon for runnable examples).
Parameters
Test example: Steady-State Initialization of AsynchronousInductionMachineSquirrelCage
Information
Test example: Steady-State Initialization of Asynchronous induction machine with squirrel cage
The asynchronous induction machine with squirrel cage is initialized in steady-state at no-load;
at time tStart a load torque step is applied.
Simulate for 1.5 seconds and plot (versus time):
- currentQuasiRMSSensor.I: stator current RMS
- aimc.wMechanical: motor's speed
- aimc.tauElectrical: motor's torque
Default machine parameters of model AIM_SquirrelCage are used.
Extends from Modelica.Icons.Example (Icon for runnable examples).
Parameters
| Name | Description |
|---|
| VNominal | Nominal RMS voltage per phase [V] |
| fNominal | Nominal frequency [Hz] |
| wSync | [rad/s] |
| tStart | Start time [s] |
| TLoad | Nominal load torque [N.m] |
| wLoad | Nominal load speed [rad/s] |
| JLoad | Load's moment of inertia [kg.m2] |
| aimcData | |
Automatically generated Mon Sep 23 17:20:28 2013.
Modelica.Electrical.Machines.Examples.AsynchronousInductionMachines.AIMC_DOL