Package Modelica.Electrical.Machines.Examples.TransformersTest examples of transformers
Package Modelica.Electrical.Machines.Examples.TransformersThis package contains test examples of DC machines.
Extends from Modelica.Icons.ExamplesPackage (Icon for packages containing runnable examples).
| Name | Description |
|---|---|
AsymmetricalLoad | Asymmetrical load |
IMC_Transformer | Test example: InductionMachineSquirrelCage transformer starting |
Rectifier12pulse | 12-pulse rectifier with 2 transformers |
Rectifier6pulse | 6-pulse rectifier with 1 transformer |
TransformerTestbench | Transformer test bench |
Model Modelica.Electrical.Machines.Examples.Transformers.TransformerTestbench
You may choose different connections as well as vary the load (even not symmetrical).
Please pay attention to proper grounding of the primary and secondary part of the whole circuit.
The primary and secondary starpoint are available as connectors, if the connection is not delta (D or d).
In some cases it may be necessary to ground the transformer's starpoint even though the source's or load's starpoint are grounded:
Extends from Modelica.Icons.Example (Icon for runnable examples).
| Type | Name | Default | Description |
|---|---|---|---|
Resistance | RL[3] | fill(0.333333333333333, 3) | Load resistance |
TransformerData | transformerData | Transformer data |
Model Modelica.Electrical.Machines.Examples.Transformers.AsymmetricalLoad
You may choose different connections.
Please pay attention to proper grounding of the primary and secondary part of the whole circuit.
The primary and secondary starpoint are available as connectors, if the connection is not delta (D or d).
In some cases it may be necessary to ground the transformer's starpoint even though the source's or load's starpoint are grounded:
Extends from Modelica.Icons.Example (Icon for runnable examples).
| Type | Name | Default | Description |
|---|---|---|---|
Resistance | RL | 1 | Load resistance |
TransformerData | transformerData | Transformer data |
Model Modelica.Electrical.Machines.Examples.Transformers.Rectifier6pulse
Test example with polyphase components:
Star-connected voltage source feeds via a transformer a diode bridge rectifier with a DC burden.
Using f=50 Hz, simulate for 0.1 seconds (5 periods) and compare voltages and currents of source and DC burden,
neglecting initial transient.
Extends from Modelica.Icons.Example (Icon for runnable examples).
| Type | Name | Default | Description |
|---|---|---|---|
Voltage | V | 100 * sqrt(0.666666666666667) | Amplitude of star-voltage |
Frequency | f | 50 | Frequency |
Resistance | RL | 0.4 | Load resistance |
Capacitance | C | 0.005 | Total DC-capacitance |
Voltage | VC0 | sqrt(3) * V | Initial voltage of capacitance |
TransformerData | transformerData1 | Data of transformer 1 |
Model Modelica.Electrical.Machines.Examples.Transformers.Rectifier12pulse
Test example with polyphase components:
Star-connected voltage source feeds via two transformers (Dd0 and Dy1) two diode bridge rectifiers with a single DC burden.
Using f=50 Hz, simulate for 0.1 seconds (5 periods) and compare voltages and currents of source and DC burden,
neglecting initial transient.
Extends from Modelica.Electrical.Machines.Examples.Transformers.Rectifier6pulse (6-pulse rectifier with 1 transformer).
| Type | Name | Default | Description |
|---|---|---|---|
Voltage | V | 100 * sqrt(0.666666666666667) | Amplitude of star-voltage |
Frequency | f | 50 | Frequency |
Resistance | RL | 0.2 | Load resistance |
Capacitance | C | 0.005 | Total DC-capacitance |
Voltage | VC0 | sqrt(3) * V | Initial voltage of capacitance |
TransformerData | transformerData1 | Data of transformer 1 | |
TransformerData | transformerData2 | Data of transformer 2 |
Model Modelica.Electrical.Machines.Examples.Transformers.IMC_Transformer
Test example: Induction machine with squirrel cage - transformer starting
At start time tStart1 three-phase voltage is supplied to the induction machine with squirrel cage via the transformer;
the machine starts from standstill, accelerating inertias against load torque quadratic dependent on speed;
at start time tStart2 the machine is fed directly from the voltage source, finally reaching nominal speed.
Simulate for 2.5 seconds and plot (versus time):
Extends from Modelica.Electrical.Machines.Examples.InductionMachines.IMC_Transformer (Test example: InductionMachineSquirrelCage transformer starting).
| Type | Name | Default | Description |
|---|---|---|---|
Voltage | VNominal | 100 | Nominal RMS voltage per phase |
Frequency | fNominal | 50 | Nominal frequency |
Time | tStart1 | 0.1 | Start time |
Time | tStart2 | 2 | Start time of bypass transformer |
Torque | TLoad | 161.4 | Nominal load torque |
AngularVelocity | wLoad | 0.016666666666667 * (2880.9 * Modelica.Constants.pi) | Nominal load speed |
Inertia | JLoad | 0.29 | Load's moment of inertia |
TransformerData | transformerData | Transformer data | |
IM_SquirrelCageData | aimcData | Induction machine data |