Part Number: TMS320F28069F Hello, I have a few questions on the InstaSPIN-FOC and InstaSPIN-MOTION User's Guide. With reference to the user data of USER_MAX_VS_MAG_PU, it is written in Section 4.2.3 as follows: 4.2.3 USER_MAX_VS_MAG_PU • 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. • Set USER_MAX_VS_MAG = 2/SQRT(3) = 1.1547 for a pure sinewave with a peak at 100% duty cycle. Current reconstruction will be needed for this scenario (Lab10a-x). • Set USER_MAX_VS_MAG = 4/3 = 1.3333 to create a trapezoidal voltage waveform. Current reconstruction will be needed for this scenario (Lab10a-x). • For space vector over-modulation, see lab 10 for details on system requirements that will allow the SVM generator to go all the way to trapezoidal. However in the file of user.h of the Motorware software package, it is written as follows: //! \brief Set USER_MAX_VS_MAG = 0.5 for a pure sinewave with a peak at SQRT(3)/2 = 86.6% duty cycle. No current reconstruction is needed for this scenario. //! \brief Set USER_MAX_VS_MAG = 1/SQRT(3) = 0.5774 for a pure sinewave with a peak at 100% duty cycle. Current reconstruction will be needed for this scenario (Lab10a-x). //! \brief 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). //! \brief For space vector over-modulation, see lab 10 for details on system requirements that will allow the SVM generator to go all the way to trapezoidal. Evidently there is a discrepancy for the assignment of USER_MAX_VS_MAG between User's Guide and the file of user.h. Which one is correct? Thank you for your guidance. With regards, G. Kim
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