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Welcome to this tutorial about the single-phase PWM inverter.
This is one of the five inverters available with the chopper/inverter
control applications.
Just left-click on this button to start it.
In the new window, under function selection, select the function you want
to use by clicking on its name.
Here, select single-phase PWM inverter.
Now let's take a look at the settings have this function here.
Switching frequency:
up to 20,000 Hertz. Frequency:
adjust the output voltage frequency from 0 to 120 Hertz.
Peak voltage:
(percentage of DC bus): Set the peak output voltage
in percentage up the input DC voltage Q1, Q4,
Q2, Q5. The switching transistors: you can choose PWM,
or always on or off for troubleshooting. Status
indicates if the function is started or not. There are also the two knobs here to
adjust the frequency and peak voltage.
And finally the start/stop button to control the function.
To help you connect your equipment,
an electrical diagram of the function is presented with the Show Connection button
for easier connection process. When your equipment is correctly connected
start the function. The yellow curve is the input voltage in AD.
The blue curve is the output voltage in CD.
And the purple and red curves are the PWM signal
of Q1 and Q2 respectively.
As you see, the yellow curb is DC voltage
while the blue curve is AC voltage, indicating that the inverter is working.
Note that I'm using the low-pass filter at CD
to get rid of the 20,000 Hertz signal in the output voltage created by those
transistors.
Only small spikes remain.
If I vary the frequency,
you can see that the output AC voltage is varying the same way.
Finally if I increase the peak voltage
the AC output increases too. This allows the user to have a variable
AC voltage both in frequency and amplitude.
And that's it for the single-phase PWM inverter.