AC-to-DC Rectifier LAB 1 - Panel

When starting the demo, the panel in figure 8 appears first with the default settings.

Figure 8: Start-Up Panel of the Single-Phase Diode Bridge Rectifier Laboratory

The panel is to be operated as follows:

In the upper right corner, under Pre-Selected the student can select the type of load, which is either resistive (with and without a smoothing capacitor) or inductive.
Once load type is selected, the student can select the load value
For a resistive load, the scenarios are shown in figure 9; while figure 10 presents the inductive load scenarios

Figure 9: Changing the Resistive Load Value

Figure 10: Changing the Inductive Load Value

In the lower left corner, the student can change control parameters and can switch control buttons (to enable/disable their associated functions).
Table 1 summarizes the control parameters, while table 2 is dedicated to the control buttons.
After setting the control parameters, the students can observe the waveforms displayed in four scopes.
More details about the displayed waveforms are given in table 3.

Control Parameters	Default Value	Interval of Variation
AC Source Voltage (V)	120	[0; 200]
AC Source Frequency (Hz)	60	50 or 60

Table 1: Control Parameters of the Single-Phase Diode Bridge Rectifier

Control Buttons	Associated Functions
Trigger		The waveforms are not triggered. They “move”.
Trigger		The waveforms are triggered with respect to a reference signal.
Data Acq.		Data acquisition is disabled.
Data Acq.		Data acquisition is enabled and allows to record .mat files for offline studies, in particular harmonic analysis.
HELP/BACK		Open the Help page, where a summary of the single-phase diode bridge rectifier is given.
HELP/BACK		Close the Help page and go back to the simulations.
Switch		AC Source frequency, 50 or 60 Hz.

Table 2: Control and Switch Buttons

On scope localization, the indices used will be like those of matrix elements.
Hence, the scope located in the upper left corner (first row, first column) is denoted Scope₁₁, while the scope in the upper right corner (first row, second column) is Scope₁₂.
By the same token, the scope in the lower left corner is Scope₂₁ while the scope in the lower right corner is Scope₂₂.

Scope	Content of Scopes & Displayed Waveforms
Scope₁₁	Load and AC Source voltages
Scope₂₁	Diode D1 Voltage
Scope₁₂	Load and AC Source currents
Scope₂₂	Diode D1 Current

Table 3: Content of Scopes and Displayed Waveforms

Note 1

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:

C:\OPAL-RT\TestDrive\v2.9.0.16\Models\Package2_1_CPU\package2_1_cpu_sm_master\OpNTtarget

Note 2

The knobs “y-scale/div” can be used to modify the range settings in the y-axis for the scopes.