Reduce noise of Te signal in a Induction machine

Hi,

I've two circuits whith an asynchronous machine. One of them is very simple, I conected the stator to a 3 phase voltage source and the rotor it's in squirrel cage mode. For this circuit I get good results for the electromagnetic torque. You can see in the first two images bellow.

Now on the second circuit I've a DFIG system where the rotor is wound, conected to a AC/DC/AC converter like the image bellow. The Te for this circuit is not so good, it gives me a very noisy electromagnetic torque (last two pictures). Can someone tell me how can I decrease or smoot this noise to get a Te more like the first one?

Answer 1

[Mohsen Aleenejad]

This issue seems more of a control issue rather than noise, I think these torque ripples might be comming from some modeling inaccuracy. Have you seen this example?

https://www.mathworks.com/help/releases/R2023b/sps/ug/three-phase-asynchronous-drive-with-sensorless-control.html?s_tid=doc_srchtitle