modelSoftStarter
Soft start of an induction machine
Extends from Modelica.Icons.Example (Icon for runnable examples).
Information
This model demonstrates a soft start of an induction machine: Voltage ramp is started at 0.1 s and should ramp up to nominal voltage within 4s, but current is limited to 2.5 times nominal current. At 5.5 s a voltage ramp down within 3 s is required.
Reference voltage is controlled by the softStartControl block, reference voltage is converted to firing angle by the voltageToAngle block. Firing angle is processed by the Signal2mPulse adaptor to firing signals which are applied to the triac.
Compare starting with firing angle by starting direct on line, star-delta starting, and starting via a transformer.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Integer | m | 3 | Number of phases |
| Real | y2d | Modelica.Electrical.Polyphase.Functions.factorY2D(m) | |
| SI.Voltage | VNominal | 100 | Nominal RMS voltage line to line |
| SI.Current | INominal | 100*y2d | Nominal RMS current at the terminals |
| SI.Frequency | fNominal | aimcData.fsNominal | Nominal frequency |
| SI.Inertia | JLoad | aimcData.Jr | Load's moment of inertia |
| SI.Torque | TLoad | 161.4 | Nominal load torque |
| SI.AngularVelocity | wLoad | 1440.45*2*Modelica.Constants.pi/60 | Nominal load speed |
| Modelica.Electrical.Machines.Utilities.ParameterRecords.IM_SquirrelCageData | aimcData |