WOLFRAM SYSTEM MODELER
SMR_Inverter_PolyphaseStarting of polyphase synchronous reluctance machine with inverter |
 |
Diagram
Wolfram Language
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SystemModel["Modelica.Magnetic.FundamentalWave.Examples.BasicMachines.SynchronousMachines.ComparisonPolyphase.SMR_Inverter_Polyphase"]
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Information
This information is part of the Modelica Standard Library maintained by the Modelica Association.
Synchronous machine with reluctance rotor fed by an ideal inverter
Ideal frequency inverters are modeled by using a
VfController
and phase SignalVoltages.
Frequency is raised by a ramp, causing the
reluctance machine to start,
and accelerating inertias. At time tStep a load step is applied. 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 (9)
| m |
Value: 5 Type: Integer Description: Number of stator phases |
|---|---|
| VsNominal |
Value: 100 Type: Voltage (V) Description: Nominal RMS voltage per phase |
| fsNominal |
Value: smrData.fsNominal Type: Frequency (Hz) Description: Nominal frequency |
| fKnee |
Value: 50 Type: Frequency (Hz) Description: Knee frequency of V/f curve |
| tRamp |
Value: 1 Type: Time (s) Description: Frequency ramp |
| T_Load |
Value: 46 Type: Torque (N⋅m) Description: Nominal load torque |
| tStep |
Value: 1.2 Type: Time (s) Description: Time of load torque step |
| J_Load |
Value: 0.29 Type: Inertia (kg⋅m²) Description: Load inertia |
| smrData |
Value: Type: SM_ReluctanceRotorData Description: Synchronous machine data |
Components (23)
 |
terminalBoxM |
Type: TerminalBox Description: Terminal box Y/D-connection |
|---|---|---|
|
terminalBox3 |
Type: TerminalBox Description: Terminal box Y/D-connection |
 |
smrM |
Type: SM_ReluctanceRotor Description: Reluctance machine with optional damper cage |
|
smr3 |
Type: SM_ReluctanceRotor Description: Reluctance machine with optional damper cage |
 |
rotorAngle3 |
Type: RotorDisplacementAngle Description: Rotor lagging angle |
 |
loadInertiaM |
Type: Inertia Description: 1D-rotational component with inertia |
|
loadInertia3 |
Type: Inertia Description: 1D-rotational component with inertia |
 |
torqueStepM |
Type: TorqueStep Description: Constant torque, not dependent on speed |
|
torqueStep3 |
Type: TorqueStep Description: Constant torque, not dependent on speed |
 |
smrData |
Type: SM_ReluctanceRotorData Description: Synchronous machine data |
 |
ground3 |
Type: Ground Description: Ground node |
 |
star3 |
Type: Star Description: Star-connection |
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signalVoltage3 |
Type: SignalVoltage Description: Polyphase signal voltage source |
 |
ramp |
Type: Ramp Description: Generate ramp signal |
 |
vfController3 |
Type: VfController Description: Voltage-Frequency-Controller |
 |
currentRMSsensorM |
Type: CurrentQuasiRMSSensor Description: Continuous quasi current RMS sensor for polyphase system |
 |
currentRMSsensor3 |
Type: CurrentQuasiRMSSensor Description: Length of space phasor -> RMS current |
|
signalVoltageM |
Type: SignalVoltage Description: Polyphase signal voltage source |
|
starM |
Type: Star Description: Star-connection |
|
groundM |
Type: Ground Description: Ground node |
|
vfControllerM |
Type: VfController Description: Voltage-Frequency-Controller |
 |
feedback |
Type: Feedback Description: Output difference between commanded and feedback input |
 |
gain |
Type: Gain Description: Output the product of a gain value with the input signal |