3-Phase BLDC Motor Sensorless Control Using MC56F8013

System Blocks Concept• Zero crossing missed — In this case, it has been detected that zero crossing was missed. Thisdetection is performed by monitoring the polarity of the back-EMF voltage of the non-fed phase,after time Toff has expired. corrective action 2 is performed.T_CmT_ZCros[n](assumed)C O M M U TA T I O NZ E R OC R O S SZero Cross is missed, because it was during Toff time.Corrective Action 2 is performed as following :T_ZCros[n]Per_ZCros[n]Per_ZCrosFlt[n]HlfCmt[n]