Bldc motor speed calculation

[venkat9chinthapalli]

Hi,

How can BLDC motor speed in RPM can be calculated from Hall sensor output?

My Motor is of One pole Pair and my Hall Sensor A frequency is 100Hz.




Thanks
venkat

 

[horace1]

if using a microcontroller such as a PIC24 you can connect the hall sensor to an interrupt on change input
you then count the interrupts over a period of time (using a timer interrupt) and calculate the RPM