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AVR172: Sensorless Commutation of Brushless
DC Motor (BLDC) using ATmega32M1 and
ATAVRMC320
Features
8-bit
Microcontrollers
? Robust sensorless commutation control
? Ramp-up sequence
Application Note
References
[1] ATmega32M1 Data sheet
[2] AVR194: Brushless DC Motor Control using ATmega32M1
[3] AVR430: MC300 Hardware User Guide
[4] AVR470: MC310 User Guide
[5] AVR471: MC320 Getting Started Guide
[6] AVR928: Sensorless methods to drive BLDC motors
1 Introduction
This application note describes how to implement a sensorless commutation of
BLDC motors with the ATAVRMC320 development kit.
The ATmega32M1 is equipped with integrated peripherals that reduce the number
of external components required in a BLDC application. The ATmega32M1 is
suitable for sensorless commutation and for commutation with Hall sensors as well,
but this application note focuses on the sensorless commutation.
The AVR928 Application Note describes the theory of the sensorless control
method and must be carefully read first.
Rev. 8306B-AVR-05/10
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