Clarity regarding the motor analysis tool.

we are using dewesoftx to visualize the dq axis current of 3 phase pmsm drive using the motor analysis tool. the obtained dq current mimic the motor phase current and vary sinusoidally we expect it to be a dc term. we are using sin cos encoder and interfaced it to the motor analysis setup, how is the angle alignment done. we tried the align to d axis function while the motor is running and it gave different value everytime.

Thank you