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

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:

• Yy ... Grounding of transformer's primary or secondary starpoint with reasonable high earthing resistance is necessary.
• Yd ... No grounding necessary.
• Yz ... Grounding of transformer's primary starpoint with reasonable high earthing resistance is necessary.
• Dy ... No grounding necessary.
• Dd ... No grounding necessary.
• Dz ... No grounding necessary.

Extends from Modelica.​Icons.​Example (Icon for runnable examples).

Parameters

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:

• Yy with primary starpoint connected to source's starpoint: primary current in only one phase
• Yy primary starpoint not connected to source's starpoint: secondary voltage breaks down
• Yz ... Grounding of transformer's primary starpoint with reasonable high earthing resistance is necessary.
• Dy ... Load current in two primary phases.
• Dz ... Load current in three primary phases.

Extends from Modelica.​Icons.​Example (Icon for runnable examples).

Parameters

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

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

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):

• currentQuasiRMSSensor.I: stator current RMS
• aimc.wMechanical: motor's speed
• aimc.tauElectrical: motor's torque

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

Parameters