Sensorless BLDC motor control with MC9S08AC16
The concept of the application is that of a speed-closed loop drive using Back-EMF zero crossing technique for positional detection. It serves as an example of a sensorless BLDC motor control system using Freescale's MCU and 3-Phase BLDC/PMSM low-voltage motor control drive. It also illustrates the usage of general on-chip peripherals for motor-control applications.
This application note includes a description of the controller features, basic BLDC motor theory, system design concept, hardware implementation, software design including the FreeMaster software visualisation tool, application setup and demo operation.
View the PDF document for more information.