WOLFRAM SYSTEM MODELER
IMS_StartStarting of induction machine with slip rings |
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Diagram
Wolfram Language
In[1]:=
SystemModel["Modelica.Magnetic.QuasiStatic.FundamentalWave.Examples.BasicMachines.InductionMachines.IMS_Start"]
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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 polyphase induction machine.
At start time tOn a transient and a quasi-static polyphase 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 currentims|imsQS.wMechanical: machine speedims|imsQS.tauElectrical: machine torque
Default machine parameters are used.
Parameters (11)
| m |
Value: 3 Type: Integer Description: Number of stator phases |
|---|---|
| mr |
Value: 3 Type: Integer Description: Number of rotor phases |
| 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.Units.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: IM_SlipRingData Description: Induction machine data |
Outputs (2)
Components (29)
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ground |
Type: Ground Description: Ground node |
|---|---|---|
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star |
Type: Star Description: Star-connection |
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sineVoltage |
Type: SineVoltage Description: Polyphase sine voltage source |
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idealCloser |
Type: IdealClosingSwitch Description: Polyphase ideal closer |
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booleanStep |
Type: BooleanStep[m] Description: Generate step signal of type Boolean |
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currentQuasiRMSSensor |
Type: CurrentQuasiRMSSensor Description: Continuous quasi current RMS sensor for polyphase system |
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terminalBoxM |
Type: MultiTerminalBox Description: Terminal box Y/D-connection |
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terminalBoxQS |
Type: MultiTerminalBox Description: Terminal box Y/D-connection |
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ims |
Type: IM_SlipRing Description: Induction machine with slip ring rotor |
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imsQS |
Type: IM_SlipRing Description: Induction machine with slip ring rotor |
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rheostatM |
Type: SwitchedRheostat Description: Rheostat which is shortened after a given time |
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rheostatQS |
Type: SwitchedRheostat Description: Rheostat which is shortened after a given time |
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loadInertia |
Type: Inertia Description: 1D-rotational component with inertia |
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loadInertiaQS |
Type: Inertia Description: 1D-rotational component with inertia |
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quadraticLoadTorque |
Type: QuadraticSpeedDependentTorque Description: Quadratic dependency of torque versus speed |
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quadraticLoadTorqueQS |
Type: QuadraticSpeedDependentTorque Description: Quadratic dependency of torque versus speed |
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imsData |
Type: IM_SlipRingData Description: Induction machine data |
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voltageSourceQS |
Type: VoltageSource Description: Constant polyphase AC voltage |
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starQS |
Type: Star Description: Star connection |
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groundQS |
Type: Ground Description: Electrical ground |
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powerSensorQS |
Type: PowerSensor Description: Power sensor |
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currentQuasiRMSSensorQS |
Type: CurrentQuasiRMSSensor Description: Continuous quasi current RMS sensor for polyphase system |
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idealCloserQS |
Type: IdealClosingSwitch Description: Polyphase ideal closer |
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booleanStepQS |
Type: BooleanStep[m] Description: Generate step signal of type Boolean |
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powerSensor |
Type: PowerSensor Description: Polyphase instantaneous power sensor |
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starMachineQS |
Type: Star Description: Star connection |
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groundMachineQS |
Type: Ground Description: Electrical ground |
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starMachine |
Type: Star Description: Star-connection |
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groundMachine |
Type: Ground Description: Ground node |