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Simulating a simscape circuit

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Paul Hamilton
Paul Hamilton on 6 May 2021
Answered: Pratyush Roy on 11 May 2021
when I try to simulate a circuit that I created in simscape I get an error message that says Spectrum cannot be displayed for continuous or infinite sample times, Please help. I have included a screen shot of my circuit.

Answers (1)

Pratyush Roy
Pratyush Roy on 11 May 2021
Hi Paul,
The model fails to simulate because the other circuit components operate under discrete rate while the spectrum analyzer operates under a continuous rate. You can make the following changes to your model:
  1. Add a rate transition between the PS-Simulink converter and the Spectrum Analyzer block.
  2. Change the solver type to "Fixed-type" under Model Settings>Solver.
  3. Change the Sample rate of the spectrum analyzer to a value greater than or equal to twice the voltage source frequency.
The figure below illustrates the changes made to the Simulink model:
You can also refer to the attached Simulink model(.slx file) with the suggested changes.
Hope this helps!

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