DC motor speed does not follow sine profile

Discussion in 'General Electronics Chat' started by Tera-Scale, Jun 14, 2012.

  1. Tera-Scale

    Thread Starter Active Member

    Jan 1, 2011
    A DC motor is given ac to vibrate ta different frequencies and a bode plot of gain and phase are plotted. I need to understand why the motor is not following a sine profile at low frequencies when connected to a tacho. The reason I can imagine is the inertia of the armature and flywheel creates some hysteresis. Is this correct?
    Last edited: Jun 14, 2012
  2. nsaspook

    AAC Fanatic!

    Aug 27, 2009
    Last edited: Jun 14, 2012