how to reduce peak overshoot in matlab simulink?

Discussion in 'Power Electronics' started by kittoo, Jul 12, 2016.

  1. kittoo

    Thread Starter New Member

    Jul 11, 2016
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    1
    Dear Sir,

    I am designing a boost converter in which the output voltage is having a peak overshoot . how to reduce ?
     
  2. crutschow

    Expert

    Mar 14, 2008
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    3,245
    Redesign it so it doesn't.
    That's all I can suggest since you didn't post the circuit schematic.
    When does this overshoot occur?
     
  3. kittoo

    Thread Starter New Member

    Jul 11, 2016
    25
    1
  4. kittoo

    Thread Starter New Member

    Jul 11, 2016
    25
    1
    thanks for the reply sir,
    i have changed the smoothing capacitor and pulse generator pulses values so many times the over shoot is repeating,if i am increasing the sample time of the model the peak over shoot is gone but what is relation between peak over shoot and sample time.
     
  5. crutschow

    Expert

    Mar 14, 2008
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    The overshoot is a result of the resonance of the inductor and the output capacitor.
    You can reduce that during startup by starting with a very low pulse duty-cycle and then slowing increasing it.
    In a real boost converter there is a feedback loop with compensation from the output to the PWM generator, to cancel the effects of the output LC resonance.
     
  6. kittoo

    Thread Starter New Member

    Jul 11, 2016
    25
    1
    sir,
    If feedback loop is taken from the output, which type of compensation is best?
     
  7. crutschow

    Expert

    Mar 14, 2008
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    Typically some form of PID compensation is used.
    Here are some articles on that.
     
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