How can I vary the load during simulation (load step change)?

Hello everyone,

I would like to start by saying that I am fairly new to simulink and this is my first post.

I have so far managed to analyse the behaviour of my closed-loop converter by step changes of the input voltage and reference voltage. However, the remaining part is to vary the load from 100 to 50% (from 2.4 to 4.8 Ohm) which I something I do not understand how to do.

For the input voltage step change for example, I have simply used a "controlled voltage source" which I varied using a step signal. But for the resistor, how can I do it? I tried to use a "controlled current source" without success.

Any help or hint would be highly appreciated.

Thank you in advance!

PS: Here is a snapshot of my circuit (without control).

Answer 1

[ERZURUM TECHNICAL UNIVERSITY]

use pulse generator.it can help you to solve your problem.