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Current reconstruction info mismatch

Hello.

InstaSPIN-FOC user guide states "Set USER_MAX_VS_MAG = 1.0 for a pure sinewave with a peak at SQRT(3)/2 = 86.6% duty cycle.No current reconstruction is needed for this scenario." (p205), but user.h comment "Set USER_MAX_VS_MAG = 2/3 = 0.6666 to create a trapezoidal voltage waveform.  Current reconstruction will be needed for this scenario (Lab10a-x).".

When the current reconstruction is needed? 

Set USER_MAX_VS_MAG = 2/3 = 0.6666 to create a trapezoidal voltage waveform.  Current reconstruction will be needed for this scenario (Lab10a-x).