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motor control svgen_dq and inverse clark transformation

Hello,

I have read spru485a (page 201) SVGEN_DQ part and I couldnt understand the idea below information. Because, according the below information when my phase A voltage is sin(wt), my reference voltage is cos(wt). Is there any specific reason why this transformation projects the quadrature or β component, Ubeta, into Vref1. 

In other words if I apply the conventional inverse clarke transformation, is it problem for my motor control?

  • As the description in technical background, this is one of an efficient implementation of SVPWM techniques, the reference vector is based on Alpha/Beta coordinates which can be from a reference output (Vref) of the FOC, includes Alpha and Beta components (Valpha and Vbeta). To convert the reference vector (Valpha and Vbeta) to determine the switching sequence and time of the transistors of a inverter. There are different algorithms for using SVPWM, more detailed description can be found in spra524.pdf application notes.