Variable frequency drive

Discussion in 'The Projects Forum' started by SKMR168, Sep 23, 2016.

  1. SKMR168

    Thread Starter New Member

    Aug 8, 2015
    13
    1
    VFD uses less frequency to control the speed.But when the frequency decreases, the current will increase.There is a chance that the current may go beyond the rated current .Then how VFD is an option for speed control??
     
  2. #12

    Expert

    Nov 30, 2010
    17,829
    9,149
    You're right. Nobody should ever use a VFD because nobody knows about the speed/current response curves of electric motors. That includes the manufacturers of the VFD drives. They were just guessing.
     
  3. tcmtech

    Distinguished Member

    Nov 4, 2013
    2,682
    2,444
    Pulse Width Modulation.

    Read about it.
     
    #12 likes this.
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