Hi sampathkumar,
Ansys employees cannot provide assistance with design decisions. If there is any query related to the tool usage we will be happy to help you.
you can check what parameters can cause the torque to fall below your expectation. Something like, is the upper limit of the voltage reached due to back emf being more? and improvise on those lines
We encourage others in the forum to pitch in to comment on this.
Regards,
Navya