dq graph non-conformity

[bpedar]

Hello,

I have modeled a 14 pole rotor rotating at 500 mechanical RPM in the condition of no excitation in the windings. Then created the following output variables to change the coordinate system from 3 phase to alpha_beta for the stationary and dq for rotating. Expecting to see constant values in dq frame. 

the FLD_srf is flux linkage in alpha and FLQ_srf is the flux linkage in beta coordinates and the fld and flq in rrf are in dq coordinates. the number 7 is multiplied to mechanical angle to give back the electrical angle. the graphs recieved are: 

as can be seen the alpha beta coordiante are as expected but dq is not and is producing a wave with twice the frequency of electrical. Appreciate anyone helping in solving this issue. 

[Tamami Yamanaka]

Hello,

Moving1.Position, cos(Theta_E) and sin(Theta_E) against time in the XY plot to check that they show the expected periodicity and linear behaviour.