Using a variable frequency AC Voltage Source in Simulink

16 次查看（过去 30 天）
Henry Taylor
Henry Taylor 2016-4-14
编辑： Henry Taylor 2016-4-18
I'm trying to simulate a RLC circuit which measures the voltage and current across a component as frequency of the input voltage changes. The input voltage is from an AC Voltage Source. I've used Simulink to create the circuit and it works fine for individual values of f. But when I try to put in a range of values for the frequency I get the error message:
'Invalid setting in 'CircuitsQuestion2/V(t)' block.
Parameter 'Frequency' must be a scalar value. Component: Simulink | Category: Model error'
What am I doing wrong?

请先登录，再回答此问题。

回答（1 个）

Sebastian Castro
Sebastian Castro 2016-4-14
You cannot enter a range (vector) of frequencies into the block. The AC voltage source block, as it is currently implemented, must retain a fixed frequency during the whole simulation.
That begs the question: Do you want to run separate simulations with different frequencies, or do you want to change the frequency of the signal over time during a single simulation?
There are solutions to both -- I just want to check with you first so I don't unload a wall of text up front :)
- Sebastian
  3 个评论
显示 1更早的评论
Sebastian Castro
Sebastian Castro 2016-4-15
OK, so there's 2 approaches I can think of for varying frequency during simulation.
  • Using a Controlled Voltage source and creating the Sine Wave input using plain Simulink blocks: V = A*sin(wt + phi)
  • Customizing the source code of the AC Voltage Source Simscape block so it works with variable frequency. Luckily, I recently worked on this in another Answer :)
http://www.mathworks.com/matlabcentral/answers/275818-simscape-language-ac-voltage-source-variable-frequency-input-problem-number-of-equations-excee
- Sebastian
Henry Taylor
Henry Taylor 2016-4-18
编辑：Henry Taylor 2016-4-18
So if I am to use the source code method, how do I go about customising the source code? Do I just make a new script?
Alternatively, how would I go about using a Controlled Voltage source and creating the Sine Wave input?

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Electrical Sensors 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by