modelIMC_DOL_Polyphase
Direct on line start of polyphase induction machine with squirrel cage
Extends from Modelica.Icons.Example (Icon for runnable examples).
Information
At start time tStart voltages are supplied to the polyphase induction machines with squirrel cage. The machines starts from standstill, accelerating inertias against load torque quadratic dependent on speed, finally reaching nominal speed. Two equivalent machines with different numbers of phases are compared and their equal behavior is demonstrated.
Simulate for 1.5 seconds and plot (versus time):
aimcM|M3.tauElectrical: machine torqueaimsM/M3.wMechanical: machine speedfeedback.y: zero since difference of three-phase current phasor and scaled polyphase current phasor are equal
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Integer | m3 | 3 | Number of stator phases of three-phase system |
| Integer | m | 5 | Number of stator phases |
| SI.Voltage | VsNominal | 100 | Nominal RMS voltage per phase |
| SI.Frequency | fNominal | aimcData3.fsNominal | Nominal frequency |
| SI.Time | tOn | 0.1 | Start time of machine |
| SI.Torque | T_Load | 161.4 | Nominal load torque |
| SI.AngularVelocity | w_Load | 1440.45*2*Modelica.Constants.pi/60 | Nominal load speed |
| SI.Inertia | J_Load | 0.29 | Load inertia |
| Integer | p | 2 | Number of pole pairs |
| Modelica.Electrical.Machines.Utilities.ParameterRecords.IM_SquirrelCageData | aimcData3 | Induction machine data of a three-phase machine | |
| Electrical.Machines.Utilities.ParameterRecords.IM_SquirrelCageData | aimcDataM | Induction machine data of an m-phase machine |