Back-emf to RPM (math problem)

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  1. - 30th August 2015, 15:30 #1
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    totalnoesmio
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    Default Back-emf to RPM (math problem)

    Hello everyone,
    I am developing a speed control for brushless DC motor and I need to convert the Back-EMF voltage into RPM.
    In the application note AN893 (equation A-8) from microchip is the equation, but I can not understand how to solve it with PBP.


    RPM = (1- (ADRESH: ADRESL / 1024)) x RPMmax


    I appreciate if someone can help me.


    Best regards
    Marcos.
    (Excuse me for my bad english)

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