Harmonics?

Discussion in 'General Electronics Chat' started by wkyong, Apr 30, 2008.

  1. wkyong

    Thread Starter Active Member

    Apr 29, 2008
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    I have made a normal linear power supply using bridge rectifier, capacitor....Its i/p 240vac 50hz & o/p 220Vdc & load it up to 6A.
    I have seen the input current waveform at scope ,I think it is like harmonics current ?
    And found that the input isolation transformer become very hot.
    How to reduce or eliminate the input harmonics current produced by the non-linear diode ?
     
  2. mik3

    Senior Member

    Feb 4, 2008
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    maybe you put a big value capacitor for filtering and it draws much current from the supply due to the harmonics.
     
  3. The Electrician

    AAC Fanatic!

    Oct 9, 2007
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  4. Audioguru

    New Member

    Dec 20, 2007
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    When 240VAC is rectified and filtered it produces 337VDC, not just 220VDC.
    So I think 117V x 6A= 702W is lost in the isolation transformer.
     
  5. mrmeval

    Distinguished Member

    Jun 30, 2006
    833
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