3
\$\begingroup\$

I am aware of the following methods. But my intention is to understand the behavior of power converter alone, before adding the controller and feedback loop.

  1. FRA analysis: Provides the open loop frequency response (converter +controller) of a closed loop power converter.
  2. .AC analysis: Works for averaged model, but need to develop the model.

Is there any way to get the equivalent of FRA analysis only for the converter section, without resorting to developing the average model?

\$\endgroup\$
4
  • \$\begingroup\$ Can you get the power stage running properly when you break the loop? \$\endgroup\$
    – Rohat Kılıç
    Commented Mar 15 at 11:33
  • \$\begingroup\$ @Rohit Kilic: With constant Duty cycle and slight perturbation on it. \$\endgroup\$
    – Dynamic_equilibrium
    Commented Mar 15 at 12:20
  • \$\begingroup\$ If the power converter has an input node and it has an output node then plot output/input but scaled for dB. It won't make a difference whether it's open-loop or closed-loop. \$\endgroup\$
    – Andy aka
    Commented Mar 15 at 12:21
  • 2
    \$\begingroup\$ You can add small-signal analysis of the power stage and use a piece-wise linear (PWL) simulator like SIMPLIS or PSIM for extracting the ac response. \$\endgroup\$
    – Verbal Kint
    Commented Mar 15 at 13:35

1 Answer 1

Reset to default
1
\$\begingroup\$

There are many simulation tools to support FRA.

\$\endgroup\$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.