Power Electronics Related questions

Discussion in 'Homework Help' started by Vihan Shahu, May 15, 2015.

  1. Vihan Shahu

    Thread Starter New Member

    May 15, 2015
    2
    0
    To convert pure sinusoidal wave into pure dc, what circuit would one employ?
    I believe a full wave controlled rectifier with LC filter at the output should suffice. Is there be a better circuit which can be employed?

    Which is the most advanced power electronic equipment employed in motor drives?
    I think the answer to this would be silicon carbide diode but do not feel sure.
     
  2. panic mode

    Senior Member

    Oct 10, 2011
    1,321
    304
    would that produce "pure" DC, without ripple?
     
  3. Vihan Shahu

    Thread Starter New Member

    May 15, 2015
    2
    0
    I guess, provided we have appropriate values. What if, I used an H bridge converter with appropriate PWM switching which will make the pole voltage lag the source voltage thereby transferring power to the DC load side, and then using a low pass filter?
     
  4. #12

    Expert

    Nov 30, 2010
    16,343
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    You are speaking in absolutes. It is nearly impossible to get from AC to, "pure DC" without going to extreme circuits and extreme costs. Attenuation of the AC component is always a matter of degree. If you do not say, "how pure" or what the load current is, the answers will not be coming to you.
     
  5. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,565
    2,379
    Whaat the...?
    Short hiatus?;)
    Max.
     
  6. #12

    Expert

    Nov 30, 2010
    16,343
    6,828
    Hey, I can drop in for a few minutes between activities, but I can not spend hours at a time, as I am accustomed to. Three or four lines of, "You can't get there from here" only requires a few minutes. A well formed answer with a small schematic usually costs me half an hour. I can do a quickie before the sweat dries off me. ;)
     
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