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Ld and Lq measurement

Question asked by ting wei chien on Nov 1, 2018
Latest reply on Nov 12, 2018 by dumitru-daniel.popa

I have read the application note of "PMSM Electrical Parameters Measurement".I'm confused about the equation of inductance measurement at equation 9 and 10.

The total inductance for serial-parallel of the stator winding  L will be 3/2 L-theta(electrical theta)?is L-theta the phase inductance? 

so when the electrical angle of rotor is at 0 degree, Ld will be (2/3)L = (2/3)*(3/2)L-theta = L-theta and so does Lq at the 90 degree?

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