modelSMPM_Inverter_Polyphase
Starting of polyphase permanent magnet synchronous machine with inverter
Extends from Modelica.Icons.Example (Icon for runnable examples).
Information
Permanent magnet synchronous machine fed by an ideal inverter
An ideal frequency inverter is modeled by using VfControllers and SignalVoltagess. Frequency is raised by a ramp, causing the permanent magnet synchronous machines to start, and accelerate the inertias. Two equivalent machines with different numbers of phases are compared and their equal behavior is demonstrated.
At time tStep a load step is applied. 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 | fsNominal | smpmData3.fsNominal | Nominal frequency |
| SI.Frequency | fKnee | 50 | Knee frequency of V/f curve |
| SI.Time | tRamp | 1 | Frequency ramp |
| SI.Torque | T_Load | 181.4 | Nominal load torque |
| SI.Time | tStep | 1.2 | Time of load torque step |
| SI.Inertia | J_Load | 0.29 | Load inertia |
| Modelica.Electrical.Machines.Utilities.ParameterRecords.SM_PermanentMagnetData | smpmData3 | Synchronous machine data of three phase machine | |
| Electrical.Machines.Utilities.ParameterRecords.SM_PermanentMagnetData | smpmDataM | Synchronous machine data of an m-phase machine |