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AC-to-DC Rectifier LAB3 - Panel

When starting the demo, the panel in figure 21 appears first with the default settings.

Figure 21: Start-Up Panel of the Three-Phase Thyristor Bridge Rectifier Laboratory

For operation of the three-phase thyristor bridge rectifier panel, the student can refer to the panel operation of the single-phase diode bridge rectifier, because the panels of both models are very similar.
The differences in content of scopes, control parameters and buttons, and contents of displays are presented in tables 16 to 19.

Control Parameters

Default Value

Interval of Variation

AC Source Voltage (V)


[0; 200]

Firing Angle (Deg)


0; 120]

AC Source Frequency (Hz)


50 or 60

Table 16: Control Parameters of the Three-Phase Thyristor Bridge Rectifier

Control Buttons

Associated Functions


The waveforms are not triggered. They “move”.

The waveforms are triggered with respect to a reference signal.

Data Acq.

Data acquisition is disabled.

Data acquisition is enabled and allows to record .mat files for offline studies, in particular harmonic analysis.


The protection fuse is blown.

The protection fuse is intact.


Open the Help page, where a summary of three-phase thyristor bridge rectifier is shown.

Close the Help page and go back to the simulations.


AC Source frequency, 50 or 60 Hz.

Table 17: Control Buttons and LED Fuse Indicators


Content of Scopes & Displayed Waveforms


AC-source voltage vAN, load voltage, and thyristor T1 voltage


AC-source voltage vAN, AC-source current iA, Fundamental of current iA


AC-source current iA, load current, and thyristor T1 current


AC-source current iA, AC-source current iB, AC-source current iC

Table 18: Content of Scopes and Displayed Waveforms in Three-Phase Thyristor Bridge Rectifier

Six displays are shown on the panel.
They are located below the scopes.
From left to right they are identified as Display1, Display2, Display3, Display4, Display5, and Display6.


Content of Displays


AC-source power (W)


Load power (W)


Fundamental of AC-source current (A)


THD of AC-source current (%)


Mean of load current (A)


Mean of load voltage (V)

Table 19: Content of Displays


The “Save File” under Scope Parameters allows the student to give different file names for data acquisition.
It is possible to save up to eleven .mat files with the name “FileSavedcurrents_X (where X can be anywhere from 0 to 10).
The student can give X values via the “Save File”, and press “Data Acq.” for acquiring data.
The data acquired can be used for offline harmonic studies.
The saved data are in the following folder:


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