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rpm calculate using pwm

Posted by VIVEK KUMAR on September 5, 2015 at 11:20pm

hello alias...


i am new here.please help me.i want to measure and calculate rpm using pwm. is it any formula for calculate pwm? and i also want to calculate RC input. i am using navstik and APM also.

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  • Moderator
    Dwgsparky September 6, 2015 at 9:15am
    You can calculate the theoretical motor speed from the output frequency which you can relate to the pen value BUT it will not be accurate as the motor produces zero power at that speed the load on the motor slows down the motor and the difference (slip) is what induces the power and so the work the motor is doing, more load= more current =more power.
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