Closed loop response not correct

[Maida]

Hi,

I am trying to determine the loop gain for LLC converter.I am running Multitone Analysis.The open loop works fine but in closed loop, the response is not right. I have changed the simulation time and even sweeped across amplitude of perturbation.

I am attaching the waveforms and circuit topology so you can guide me better

[Kris_Eberle]

Hello, you will need to post your model for anyone to provide help with your question.

Regards,

Kris