Package Modelica.​Electrical.​Machines.​Examples.​Transformers
Test examples of transformers

Information

This package contains test examples of DC machines.

Extends from Modelica.​Icons.​ExamplesPackage (Icon for packages containing runnable examples).

Package Contents

NameDescription
AIMC_TransformerTest example: AsynchronousInductionMachineSquirrelCage transformer starting
AsymmetricalLoadAsymmetrical load
Rectifier12pulse12-pulse rectifier with 2 transformers
Rectifier6pulse6-pulse rectifier with 1 transformer
TransformerTestbenchTransformer test bench

Model Modelica.​Electrical.​Machines.​Examples.​Transformers.​TransformerTestbench
Transformer test bench

Information

Transformer test bench:

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).

Parameters

TypeNameDefaultDescription
ResistanceRL[3]fill(0.333333333333333, 3)Load resistance
TransformerDatatransformerData  

Model Modelica.​Electrical.​Machines.​Examples.​Transformers.​AsymmetricalLoad
Asymmetrical load

Information

Asymmetrical (singlephase) load:

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).

Parameters

TypeNameDefaultDescription
ResistanceRL1Load resistance
TransformerDatatransformerData  

Model Modelica.​Electrical.​Machines.​Examples.​Transformers.​Rectifier6pulse
6-pulse rectifier with 1 transformer

Information

Test example with multiphase 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).

Parameters

TypeNameDefaultDescription
VoltageV100 * sqrt(0.666666666666667)Amplitude of star-voltage
Frequencyf50Frequency
ResistanceRL0.4Load resistance
CapacitanceC0.005Total DC-capacitance
VoltageVC0sqrt(3) * VInitial voltage of capacitance
TransformerDatatransformerData1  

Model Modelica.​Electrical.​Machines.​Examples.​Transformers.​Rectifier12pulse
12-pulse rectifier with 2 transformers

Information

Test example with multiphase 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).

Parameters

TypeNameDefaultDescription
VoltageV100 * sqrt(0.666666666666667)Amplitude of star-voltage
Frequencyf50Frequency
ResistanceRL0.2Load resistance
CapacitanceC0.005Total DC-capacitance
VoltageVC0sqrt(3) * VInitial voltage of capacitance
TransformerDatatransformerData1  
TransformerDatatransformerData2  

Model Modelica.​Electrical.​Machines.​Examples.​Transformers.​AIMC_Transformer
Test example: AsynchronousInductionMachineSquirrelCage transformer starting

Information

Test example: Asynchronous induction machine with squirrel cage - transformer starting
At start time tStart1 three phase voltage is supplied to the asynchronous 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):

Default machine parameters of model AIM_SquirrelCage are used.

Extends from Modelica.​Electrical.​Machines.​Examples.​AsynchronousInductionMachines.​AIMC_Transformer (Test example: AsynchronousInductionMachineSquirrelCage transformer starting).

Parameters

TypeNameDefaultDescription
VoltageVNominal100Nominal RMS voltage per phase
FrequencyfNominal50Nominal frequency
TimetStart10.1Start time
TimetStart22Start time of bypass transformer
TorqueTLoad161.4Nominal load torque
AngularVelocitywLoad0.016666666666667 * (2880.9 * Modelica.Constants.pi)Nominal load speed
InertiaJLoad0.29Load's moment of inertia
TransformerDatatransformerData  
AIM_SquirrelCageDataaimcData  

Generated 2018-12-12 12:10:10 EST by MapleSim.