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Re: [AVR-Chat] Sensorless Brushless motor control using back-EMF Feedback

2007-05-03 by dlc@frii.com

>> ... Does anyone have any experience with creating an Atmel based motor
>> controller?
>
> I've done a simple BLDD driver with a ATMega8535 (on a BX-24p).  I did
> it with three PWM phases, which yielded very slow slow low-torque
> rotation.  Getting speed from a BLDD requires feedback, I think you'll
> find.

  I have RC aircraft ESC's for brushless motors that claim to be
sensorless and they are running at 10-20KHz with very respectable
torque.  So unless I'm misunderstanding what you are saying, it is
indeed possible to create fast and powerful controllers without sensors.

???
DLC
--
Dennis Clark

>
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