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Sensorless BLDC motor control using MC9S08AC16

Posted: 07 May 2009 ?? ?Print Version ?Bookmark and Share

Keywords:MC9S08AC16? BLDC sensorless? motor control?

This application note describes the design of a 3-phase sensorless BLDC motor drive with Back-EMF zero crossing. It is based on Freescale's MC9S08AC16 that can be effectively used for motor-control applications.

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 visualization tool, application setup and demo operation.

View the PDF document for more information.

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