Newbie needs help :(

Discussion in 'Homework Help' started by valcon777, Apr 8, 2009.

  1. valcon777

    Thread Starter New Member

    Apr 8, 2009
    3
    0
    hiiiii


    i need helpp in this question's


    1- what should be the PIV rating of diodes in the circuit ?

    2- if one of the diode in the rectifier is opens , what should be the possible output voltage ?

    3- if one of the diode in the bridge rectifier shorts what are the possible consequences ?

    4- discuss the effect of change in the value of filter capacitor used ?

    5- what happens to output voltage of a rectifier if the capacitor becomes very leaky ?

    6- if the primary winding of the transformer in the power supply , what will you observe in the rectified output ?

    7- the dc output voltage of the filtered rectifier is less thae it should be . what could be the problem ?


    plzzzzzz


    Thanxxx :confused: :(
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    1. Peak Inverse Voltage should be obvious. What will happen to a diode with a PIV of 50 in a 200 volt rectifier?

    2. Depends on the rectifier, but look at the current path that opened.

    3. Should be obvious.

    4. Think of ripple voltages.

    5. Should be obvious.

    6. The statement makes no sense.

    7. What might prevent charge getting to the cap?
     
  3. valcon777

    Thread Starter New Member

    Apr 8, 2009
    3
    0
    :confused: ????????? <<<<
     
  4. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
  5. valcon777

    Thread Starter New Member

    Apr 8, 2009
    3
    0
    no one <<<<<< ??? :mad:
     
  6. b.shahvir

    Active Member

    Jan 6, 2009
    444
    0
    :) Have patience! did you try the link provided by Beenthere? Knowledge is a gradual learning process, rushing thru it won't help. Try browsing online articles too. Go to wikipedia or google bridge rectifiers. You will definitely find something relating your query.

    P.S. No offense, but plz be more precise in your questions....do not leave them lingering. :rolleyes:
     
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