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An1017A application note microchip

Discussion in 'Microcontrollers, Programming and IoT' started by electronicsLearner77, May 4, 2018.

  1. electronicsLearner77

    electronicsLearner77

    73
    1
    Jul 2, 2015
    The AN1017A application note is the sinusoidal control of BLDC motors. I am implementing it but i have few questions. The source code provided for that refers to two terms phaseoffsetCW and phaseoffsetCCW. I am confused with this. The document says this is added for symmetry of sine wave can someone please explain me this?
     
  2. kellys_eye

    kellys_eye

    4,284
    1,145
    Jun 25, 2010
    Looks like you have to adjust the phase of the driving waveform to maintain maximum current flow in the windings as the speed increases (lag caused by inductive loading) - this is the offset value (in clockwise and counterclockwise directions).
     
    electronicsLearner77 likes this.
  3. electronicsLearner77

    electronicsLearner77

    73
    1
    Jul 2, 2015
    Thank you for the reply. Is it possible to give some detailed explanation or any link explaining this. Please advise.
     
  4. Harald Kapp

    Harald Kapp Moderator Moderator

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    1,844
    Nov 17, 2011
  5. electronicsLearner77

    electronicsLearner77

    73
    1
    Jul 2, 2015
    Theoritically it feels ok but when i am implementing the application note facing difficulties.
     
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