WOLFRAM SYSTEM MODELER
SMPM_MTPATest example: PermanentMagnetSynchronousMachine, investigating maximum torque per Amps |
 |
Diagram
Wolfram Language
In[1]:=
SystemModel["Modelica.Magnetic.QuasiStatic.FundamentalWave.Examples.BasicMachines.SynchronousMachines.SMPM_MTPA"]
Out[1]:=
Information
This information is part of the Modelica Standard Library maintained by the Modelica Association.
This example investigates the maximum torque per amps (MTPA) of a quasi-static permanent magnet synchronous machine. The machines is operated at constant speed. The current magnitude is kept constant and the current angle is rotated from 0 to 360 degrees with the simulation period of one second.
In this simulation the angle is the following angles are calculated:
phi_v= angle of voltage phasorphi_i= angle of current phasorphiphi_v - phi_i= angle between voltage and current phasortheta= rotor displacement angleepsilon = phi - theta= current angle
Simulate for 1 second and plot (versus angle epsilon):
smpmQS.tauElectrical: machine torquesmpmQS.abs_vs[1]: machine phase voltage magnitudephi: phase angle between voltage and current phasor
Note
The resistors connected to the terminals of the windings of the quasi-static machine model are necessary to numerically stabilize the simulation.
Parameters (11)
| m |
Value: 3 Type: Integer Description: Number of phases |
|---|---|
| VNominal |
Value: 100 Type: Voltage (V) Description: Nominal RMS voltage per phase |
| fNominal |
Value: 50 Type: Frequency (Hz) Description: Nominal frequency |
| f |
Value: 50 Type: Frequency (Hz) Description: Actual frequency |
| tRamp |
Value: 1 Type: Time (s) Description: Frequency ramp |
| TLoad |
Value: 181.4 Type: Torque (N⋅m) Description: Nominal load torque |
| tStep |
Value: 1.2 Type: Time (s) Description: Time of load torque step |
| JLoad |
Value: 0.29 Type: Inertia (kg⋅m²) Description: Load's moment of inertia |
| wNominal |
Value: 2 * pi * fNominal / smpmData.p Type: AngularVelocity (rad/s) Description: Nominal angular velocity |
| positiveRange |
Value: false Type: Boolean Description: Use positive range of angles, if true |
| smpmData |
Value: Type: SM_PermanentMagnetData Description: Synchronous machine data |
Outputs (5)
| theta |
Default Value: rotorAngleQS.rotorDisplacementAngle Type: Angle (rad) Description: Rotor displacement angle, quasi-static |
|---|---|
| phi_i |
Default Value: Modelica.Math.wrapAngle(smpmQS.arg_is[1], positiveRange) Type: Angle (rad) Description: Angle of current |
| phi_v |
Default Value: Modelica.Math.wrapAngle(smpmQS.arg_vs[1], positiveRange) Type: Angle (rad) Description: Angle of voltage |
| phi |
Default Value: Modelica.Math.wrapAngle(phi_v - phi_i, positiveRange) Type: Angle (rad) Description: Angle between voltage and current |
| epsilon |
Default Value: Modelica.Math.wrapAngle(phi - theta, positiveRange) Type: Angle (rad) Description: Current angle |
Components (18)
 |
smpmData |
Type: SM_PermanentMagnetData Description: Synchronous machine data |
|---|---|---|
 |
smpmQS |
Type: SM_PermanentMagnet Description: Permanent magnet synchronous machine with optional damper cage |
 |
quadraticSpeedDependentTorqueQS |
Type: ConstantSpeed Description: Constant speed, not dependent on torque |
 |
starMachineQS |
Type: Star Description: Star connection |
 |
groundMQS |
Type: Ground Description: Electrical ground |
 |
terminalBoxQS |
Type: MultiTerminalBox Description: Terminal box Y/D-connection |
 |
currentControllerQS |
Type: CurrentController Description: Current controller |
 |
angleSensorQS |
Type: AngleSensor Description: Ideal sensor to measure the absolute flange angle |
 |
referenceCurrentSourceQS |
Type: ReferenceCurrentSource Description: Variable polyphase AC current with reference angle input |
|
starQS |
Type: Star Description: Star connection |
|
groundeQS |
Type: Ground Description: Electrical ground |
 |
resistorQS |
Type: Resistor Description: Polyphase linear resistor |
 |
rotorAngleQS |
Type: RotorDisplacementAngle Description: Rotor lagging angle |
 |
currentRMSSensorQS |
Type: CurrentQuasiRMSSensor Description: Continuous quasi current RMS sensor for polyphase system |
 |
voltageQuasiRMSSensorQS |
Type: VoltageQuasiRMSSensor Description: Continuous quasi voltage RMS sensor for polyphase system |
|
starMQS |
Type: Star Description: Star connection |
 |
rotSource |
Type: ComplexRotatingPhasor Description: Generate a phasor with constant magnitude and constant angular velocity of type Complex |
 |
toReal |
Type: ComplexToReal Description: Converts complex to Cartesian representation |