ROBOT.LK

Since guys were little confused with drive motors, I thought of adding some documents that will help you to understand.

AN INTRODUCTION TO SENSORLESS BRUSHLESS DC MOTOR DRIVE APPLICATIONS WITH THE ST72141
http://www.veech.com/index_files/DC%20M ... ontrol.pdf

Brushless, sensorless motors with three connections are in fact, not DC motors at all. They are actually permanent magnet synchronous AC, 3-phase motors. The commutation is done electronically. Three distinct semi sinusoidal waveforms (not pure sinewave AC) that come in at different times (or degrees) will causes the rotor to rotate with the changing (alternating) magnetic fields of the stator.

See page 7 of above doc for details.

Using the dsPIC30F for Sensorless BLDC Control
http://ww1.microchip.com/downloads/en/A ... 00901a.pdf

AVR444: Sensorless control of 3-phase brushless DC motors
http://www.atmel.com/dyn/resources/prod ... oc8012.pdf

ATAVRMC100
http://www.atmel.com/dyn/resources/prod ... oc7551.pdf

Quick workout.
http://www.instructables.com/files/orig ... R1H6EW.pdf

Nice video tutorials.
Sensorless BLDC motor control using a Majority Function
[media]http://www.youtube.com/watch?v=NZsbE47Qcms[/media]

[media]http://www.youtube.com/watch?v=8XiR6cMmckQ[/media]

Short one but good.
[media]http://www.youtube.com/watch?v=5k7D2rlWyDk[/media]

woh,
This made my day, thanks !
Put more things like this.