Hi i read a new technique for sensorless BLDC motor control. In that they use difference between two phase voltages eg: Va-Vc.
The circuit has been designed and implemented for use in the sensorless drive of a brushless DC (BLDC) motor. The circuit consists simply of differential amplifiers and comparators, and detects the zero-crossing point of the back electromotive force difference. The circuit output is identical to that of the Hall sensor signal.
"Your text to link here...(Sensorless Technique in IEEE)":http://ieeexplore.ieee.org/search/searchresult.jsp?newsearch=true&queryText=Commutation+instant+detector+for+sensorless+drive+of+BLDC+motor&x=41&y=8
The circuit has been designed and implemented for use in the sensorless drive of a brushless DC (BLDC) motor. The circuit consists simply of differential amplifiers and comparators, and detects the zero-crossing point of the back electromotive force difference. The circuit output is identical to that of the Hall sensor signal.
"Your text to link here...(Sensorless Technique in IEEE)":http://ieeexplore.ieee.org/search/searchresult.jsp?newsearch=true&queryText=Commutation+instant+detector+for+sensorless+drive+of+BLDC+motor&x=41&y=8
