PID control

Discussion in 'General Electronics Chat' started by TAKYMOUNIR, Mar 14, 2013.

  1. TAKYMOUNIR

    Thread Starter Active Member

    Jun 23, 2008
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    please I need help to understand how to design voltage control loop or current control loop in PID control for designing high voltage power supply
    is someone know good links or lectures for this subject
    thanks
     
  2. antonv

    Member

    Nov 27, 2012
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  3. TAKYMOUNIR

    Thread Starter Active Member

    Jun 23, 2008
    351
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  4. Markd77

    Senior Member

    Sep 7, 2009
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    One of the best descriptions I've seen is on the Wikipedia page.
    If any of the terms are too large there will be too much overshoot and maybe oscillation. Too small and the speed of response is not as good as it could be.
     
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  5. crutschow

    Expert

    Mar 14, 2008
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    Here's a good reference on designing stable control loops in switching power supplies.
     
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  6. Jaguarjoe

    Active Member

    Apr 7, 2010
    770
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    You are driving a car on a flat level road. With the throttle at a random fixed position, the car will travel at a fixed speed, typically different from the set point (the speed limit sign) because the load is constant.

    When you climb a hill, without moving the throttle, you will fall far away from the set point because the load changed.

    Proportional only control is driving on that flat level road. You will only run at one speed and cannot react to any change in load.

    Reset or Integral integrates the difference between your speed and the set point forcing the throttle to make your speed equal to the set point.

    Preact or Rate or Derivative will begin to work at the inflection point of the hill you were climbing maintaining the setpoint before any significant deviation occurs.
     
    Last edited: Mar 18, 2013
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  7. TAKYMOUNIR

    Thread Starter Active Member

    Jun 23, 2008
    351
    1
    Hi can you please help me i submit thread about ac signal in differential amplifier can you help me in this
    thanks
     
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