Part Number: TMS320F280049C
Does anyone know is the PMSM in InstaSpin labs is 5 switch HW or 7 switch SW tables to produce space vector PWM? InstaSpin PDF technical brief shows a typical SVPWM 8 code table but that ain't proof the gooses ever lays a golden eggs.
Notice odd call to force output B continuously high via SW call in lab is01. Or is there some other reason for this potentially harmful control even with dead band enabled? From reading TI 2010 PDF of how SPVPWM functions it seems forcing B high could be result of nosier harmonics 5 switch HW mode control being used in the labs.
1 2 3 4 5 | // setup the Action-qualifier Continuous Software Force Register// (AQCSFRC)EPWM_setActionQualifierContSWForceAction(obj->pwmHandle[cnt], EPWM_AQ_OUTPUT_B, EPWM_AQ_SW_OUTPUT_HIGH); |