modelIMS_Start
Starting of induction machine with slip rings
Extends from Modelica.Icons.Example (Icon for runnable examples).
Information
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
| Type | Name | Default | Description |
|---|---|---|---|
| Integer | m | 3 | Number of stator phases |
| Integer | mr | 3 | Number of rotor phases |
| SI.Voltage | VsNominal | 100 | Nominal RMS voltage per phase |
| SI.Frequency | fNominal | ims.fsNominal | Nominal frequency |
| SI.Time | tOn | 0.1 | Start time of machine |
| SI.Resistance | RStart | 0.16/imsData.turnsRatio^2 | Starting resistance |
| SI.Time | tRheostat | 1.0 | Time of shortening the rheostat |
| SI.Torque | T_Load | 161.4 | Nominal load torque |
| SI.AngularVelocity | w_Load | Modelica.Units.Conversions.from_rpm(1440.45) | Nominal load speed |
| SI.Inertia | J_Load | 0.29 | Load inertia |
| Modelica.Electrical.Machines.Utilities.ParameterRecords.IM_SlipRingData | imsData | Induction machine data |