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Center aligned PWM

Discussion in 'General Electronics Chat' started by elecLear78, Sep 9, 2017.

  1. elecLear78

    elecLear78 Member

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    I am bit confused with this. When should i use center aligned pwm and when edge aligned pwm for 3 phase driver. Will there be any performance difference? Please advice. I am not sure if i am giving enough information.
     
  2. cowboybob

    cowboybob Well-Known Member Most Helpful Member

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    In essence, a center aligned pwm 3 phase driver results in fewer harmonics than an edge aligned arrangement.

    See this ETO thread and this TI pub (pp. 9 & 10).

    I'm sure there's other expositions on this subject.
     
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