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

Question

Faycal S 2018-4-20

0
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https://ww2.mathworks.cn/matlabcentral/answers/396367-how-can-i-vary-the-load-during-simulation-load-step-change

回答： ERZURUM TECHNICAL UNIVERSITY 2020-2-26

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).