Finding Back EMF constant from motor specification

Discussion in 'Homework Help' started by Edward Ball, Jan 13, 2019.

  1. Edward Ball

    Thread Starter New Member

    Jan 13, 2019
    1
    0
    Hi there, part of my coursework needs me to work out the back emf constant kω and I'm struggling to reach the needed answer. The motor specification can be found at https://www.mfacomodrills.com/pdfs/919D series.pdf. The given emf constant is 7.26x10^-3. Any tips or pointers would be welcome. Many thanks!

    PDF Added
     
    Last edited by a moderator: Jan 13, 2019
  2. drc_567

    AAC Fanatic!

    Dec 29, 2008
    686
    103
    ... just looking at the reference link:
    https://en.m.wikipedia.org/wiki/Motor_constants
    where the constant Kv is described, it looks like the basic problem is to obtain an accurate voltage measurement directly at the stator coils, as the motor is operated at the maximum no-load RPM. ... A scope measurement might be appropriate here.
    ... maybe include the units that are required for your measurement.
     
  3. ericgibbs

    Moderator

    Jan 29, 2010
    8,536
    1,713
    hi Edward,
    Welcome to AAC.
    Added the PDF to your post.
    E
     
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