modelDCSE_SinglePhase
Test example: DC with serial excitation starting with voltage ramp
Extends from Modelica.Icons.Example (Icon for runnable examples).
Information
Test example: Series excited DC machine at single-phase AC voltage started with a series resistorAt sinusoidal source voltage, a series resistor limiting the armature current, is reduced according to a ramp, causing the DC machine to start, and accelerating inertias against load torque quadratic dependent on speed, finally reaching nominal speed.
Simulate for 2 seconds and plot (versus time):
- dcse.ia: armature current
- dcse.wMechanical: motor's speed
- dcse.tauElectrical: motor's torque
Note:
Since both the field and the armature current are sinusoidal, the waveform of the torque is the square of sine. Due to the additional inductive voltage drops, output of the motor is lower, compared to the same motor (DCSE_Start) at DC voltage.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| SI.Voltage | Va | 100 | Actual armature voltage RMS |
| SI.Time | tStart | 0.1 | Start of resistance ramp |
| SI.Time | tRamp | 0.9 | Resistance ramp |
| SI.Torque | TLoad | 63.66 | Nominal load torque |
| SI.AngularVelocity | wLoad | 1410*2*Modelica.Constants.pi/60 | Nominal load speed |
| SI.Inertia | JLoad | 0.15 | Load's moment of inertia |
| Utilities.ParameterRecords.DcSeriesExcitedData | dcseData | DC machine data |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Machines.BasicMachines.DCMachines.DC_SeriesExcited | dcse | ||
| Modelica.Blocks.Sources.Ramp | ramp | ||
| Modelica.Electrical.Analog.Sources.SineVoltage | constantVoltage | ||
| Modelica.Electrical.Analog.Basic.Ground | ground | ||
| Modelica.Mechanics.Rotational.Components.Inertia | loadInertia | ||
| Modelica.Mechanics.Rotational.Sources.QuadraticSpeedDependentTorque | quadraticLoadTorque | ||
| Modelica.Electrical.Analog.Basic.VariableResistor | variableResistor |