Any Knowledge Would Be Highley Appreciated I Have 2 Questions Regarding Rectification

Discussion in 'Homework Help' started by Mikey91, Mar 29, 2016.

  1. Mikey91

    Thread Starter New Member

    Mar 29, 2016
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    1) Potential effects the use of rectifiers has on AC circuits?
    2) considerations required when designing AC circuits when rectifiers are installed.

    any help would be really appreciated, its something I cannot find and good source explaining clearly.

    thanks
     
  2. WBahn

    Moderator

    Mar 31, 2012
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    Sounds like homework questions.

    The term "AC circuits" covers a lot of ground and a lot of different types of circuits that do a lot of different kinds of things. Also, a lot depends on how these unspecified rectifiers are used with regard to these unspecified AC circuits.
     
  3. Mikey91

    Thread Starter New Member

    Mar 29, 2016
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    It is exactly that, that's why the questions are not very specific in regards to AC circuits. :(
     
  4. WBahn

    Moderator

    Mar 31, 2012
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    MOD NOTE: Moved to Homework Help from General Electronics Chat.
     
  5. WBahn

    Moderator

    Mar 31, 2012
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    The question is probably being asked in the context of the types of AC circuits you have been exposed to, which we can't even guess. So what kinds of AC circuits have you been studying?
     
  6. crutschow

    Expert

    Mar 14, 2008
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    Your questions are rather too vague to answer.
    Need more context.
    Where did these questions come from?
     
  7. Mikey91

    Thread Starter New Member

    Mar 29, 2016
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    The unit we are studying is motors and rectification.

    The question is written as explain the potential effects that the use of rectifiers has on AC circuits and supplies: and considerations required when designing electrical circuits when rectifiers are installed.

    thanks for the moving of this post, i am new to this.
     
  8. crutschow

    Expert

    Mar 14, 2008
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    Here are some considerations when using rectifiers to generate DC from AC:
    Half-wave or full-wave.
    Peak current from AC supply drawn by the diodes (which requires derating of a transformer supplying the AC).
    DC ripple voltage versus output current (size of filter capacitor).
    Diode voltage and current rating.
     
  9. MaxHeadRoom

    Expert

    Jul 18, 2013
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    Also for the most part capacitive smoothing is not usually required with DC motor's and other inductive devices.
    If such as PWM control is used, then a smoothed supply is desirable.
    There are also SCR bridge and Triac control of DC motor where capacitive smoothing is not required.
    Max.
     
  10. MaxHeadRoom

    Expert

    Jul 18, 2013
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    There is also of course, 3phase rectification where the ripple frequency is higher that single phase and the percentage of ripple a few % as opposed to 1ph rectification where it is 100% ripple.
    Max.
     
  11. Mikey91

    Thread Starter New Member

    Mar 29, 2016
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    thank you for your help guys.
     
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