impedance matching and pwm circuit

Discussion in 'General Electronics Chat' started by adison, Apr 28, 2009.

  1. adison

    Thread Starter New Member

    Apr 28, 2009
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    0
    Hallow friends
    I have en electrical device that work white 110 volt and 50 ampere AC my driver burned because there is volt and current that return to the driver
    I search after an electrical circuit that absorb the return current
    I can't use diodes because I have AC current (not DC current)
    This problem is attached to Transmission Lines
    Maybe the circuit solution use coals or impedance matching
    If anybody have a good site to buy this or to understand this I will glad to know
    Also I have another problem that I need to design a pwm circuit
    [​IMG]

    this is what I have but the left device is burned what is this device ?​
    [​IMG]
    Thanks​
    adison​
     
  2. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    You can use a varistor or surge suppressor to suppress the back EMF.

    What is inside the controller?
     
  3. adison

    Thread Starter New Member

    Apr 28, 2009
    4
    0
    thanks mik3
    I will glad to receive more responses
    Also about pwm circuit
    adison
     
  4. mik3

    Senior Member

    Feb 4, 2008
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  5. adison

    Thread Starter New Member

    Apr 28, 2009
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    thanks again mik3
    I understand that my problem is that I need a positive voltage regulator
    That can work with 50 volt
    And my positive voltage regulator can work only with 24 volt
    http://www.datasheetcatalog.com/datasheets_pdf/L/7/8/0/L7805C-V.shtml
    Where I can buy a positive voltage regulator that can work with 50 volt
    And where I can buy a stubs (double stub, parallel stub and serial stub)
    Thanks
    adison
     
  6. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    What is the value of the desired regulated voltage?
     
  7. adison

    Thread Starter New Member

    Apr 28, 2009
    4
    0
    110 volt AC
    and 5 volt pwm
     
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