AUTOMOTORDRIVER: doubts about park transform for BLDC/PMSM motor

Part Number:AUTOMOTORDRIVER

Dear All,

I am designing a BLDC motor drive. I am using Matlab to implement FOC. I am still beginner for FOC concept. I have just put one PMSM motor and rotate through external torque command which you can see in my attached model. The motor rotates and I can see the rotation speed in the scope. But the output of DQ (Park transform) of output current is not per expected. I was expecting constant value of D Q as it is the rotating frame. Can someone help me what could be the reason, why the DQ waveform is 90degree shifted sine wave for my model?

Thanks