Where to inject small signal for average current mode control

Thread Starter

SiCEngineer

Joined May 22, 2019
220
Hi,

In average current mode control to check the loop gain, phase and crossover freq. a small signal is injected before the feedback resistors of the output voltage sensor.

If I want to see what the cross over frequency of the current loop is, with respect to the cross over of the outer loop, how do I do that?

I need to have my inner current loop twice the cross over frequency of my outer voltage loop, but I can't seem to find a way to give me an accurate result of where to place the small signal 1V source.

I can't seem to find anywhere online that shows how to do this, just has a small signal in the outer loop and that's it.

Am I missing something, maybe?
I have attached an image for illustration, of where i currently have the signals placed,.
Thanks,
J
 

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