SSHI Control

Discussion in 'The Projects Forum' started by Jason87, May 9, 2012.

  1. Jason87

    Thread Starter Member

    Dec 10, 2009
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    0
    Hi,

    anyone knows how SSHI control is achieved?, i am using it with reference to a piezo harvester

    I was referred to an IC LTC1440 but cannot understand how it achieves peak and minima detections..
     
  2. #12

    Expert

    Nov 30, 2010
    16,343
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    Is this what you are interested in?
     
  3. Jason87

    Thread Starter Member

    Dec 10, 2009
    39
    0
    yes, that is actually.

    But cannot understand how the control circuitry for switching is achieved...

    can you give me help with that?
     
  4. #12

    Expert

    Nov 30, 2010
    16,343
    6,828
    I don't have a clue.

    Anybody else?
     
  5. Jason87

    Thread Starter Member

    Dec 10, 2009
    39
    0
    they suggested me an IC LTC1440 to control the switching...have you any idea of this IC?

    can you understand the basis of SSHI??
     
  6. #12

    Expert

    Nov 30, 2010
    16,343
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    You need to learn how to google. Just type the part number and "datasheet". or SSHI and piezo.
     
  7. Jason87

    Thread Starter Member

    Dec 10, 2009
    39
    0
    i googled that IC, but i still don't know how to implement it for switching the inductor in the SSHI...

    From datasheet i can understand that you just set the resistors for a specific voltage parameter for which when it goes under that parameter the IC output goes high.

    But with piezo the voltage input varies, it is not static...how can it monitor when the output is maximum, and what about when you are in the negative cycle?
     
  8. #12

    Expert

    Nov 30, 2010
    16,343
    6,828
    You didn't need to google the chip after I posted the datasheet in post#6.

    As for the rest of the questions, see post#4

    I don't have a clue. Anybody else willing to help?
     
  9. Jason87

    Thread Starter Member

    Dec 10, 2009
    39
    0
    Look at this document...can you understand what is happening?

    [​IMG]
     
  10. Jason87

    Thread Starter Member

    Dec 10, 2009
    39
    0
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