How to vary offset during simulation

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Luiz Souza
Luiz Souza am 17 Apr. 2020
Bearbeitet: Fangjun Jiang am 20 Apr. 2020
Hello, i need to vary the offset of a 60hz 180V sinewave during the simulation.
How can i do that? I am trying to use Step and Controlled voltage source, but it's not working.
Any ideas?
Thanks
  2 Kommentare
Fangjun Jiang
Fangjun Jiang am 17 Apr. 2020
what offset, phase?
Luiz Souza
Luiz Souza am 17 Apr. 2020
Bearbeitet: Luiz Souza am 17 Apr. 2020
Well, i need to vary the offset to:
0V->100V->50V->-20V during the simulation
Same phase

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Antworten (2)

Jesús Zambrano
Jesús Zambrano am 18 Apr. 2020
Hi Luiz,
You can include a slider (fomr the section Dashboard in the Library) in the Simulink model, and link it to the SineWave bias. Then you can change the bias during the simulation by moving the slider.
  2 Kommentare
Luiz Souza
Luiz Souza am 19 Apr. 2020
Bearbeitet: Luiz Souza am 19 Apr. 2020
Ok, i'm gonna try, thank you!
But is there a way to vary the offset "automatically"? I need to do it in a determinate time.
Or maybe a block that pauses the simulation when it reaches determinate time.
Thanks
Jesús Zambrano
Jesús Zambrano am 19 Apr. 2020
You can include a MATLAB function block with a piece of code to do this change in the time you want. See the screenshot below, where I use the 'Clock' block to ge tthe current simulation time, and when time is equal to 20, the bias is set to 10.
Another good option is to do it with simple blocks. Please read the following post with an example:

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Fangjun Jiang
Fangjun Jiang am 20 Apr. 2020
Bearbeitet: Fangjun Jiang am 20 Apr. 2020
So you need to generate V*sin(2*pi*f*t).
There is a block for sin(). Use "Repeating Sequence" or "Repeating Sequence Interpolated" from Simulink Source library where you can specify any time-value pairs.

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