power mode

Discussion in 'General Electronics Chat' started by TAKYMOUNIR, Oct 30, 2014.

  1. TAKYMOUNIR

    Thread Starter Active Member

    Jun 23, 2008
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    in power supply there are voltage mode and current mode and some has power mode ,my question is in power mode how the servo loop control the power,is he control the voltage and current in the same time or how ?
     
  2. crutschow

    Expert

    Mar 14, 2008
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    I assume it adjusts the voltage so that the product of the output voltage and current (power) stay constant (within the current and voltage limits of the supply). So it would have some type of multiplier to perform the multiplication of the output voltage and current.
     
  3. MaxHeadRoom

    Expert

    Jul 18, 2013
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    Last edited: Oct 30, 2014
  4. TAKYMOUNIR

    Thread Starter Active Member

    Jun 23, 2008
    351
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    SO WHAT IS THE DIFFERENCE BETWEEN VOLTAGE MODE AND POWER MODE
     
  5. MaxHeadRoom

    Expert

    Jul 18, 2013
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    You still specifically need to define if it is the servo loop/drive you are referring to as you mention servo loop in your OP, or some other part of the equipment?
    Max.
     
  6. GopherT

    AAC Fanatic!

    Nov 23, 2012
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    "power mode" is when you use both current limit AND voltage limit at the same time on a power supply. It is not a fair/accurate description. I don't think good quality suppliers like Agilent, Tektronix use this term but I have seen it in the manuals of low-end power supplies.

    It is essentially voltage control until you apply a load, then current limit if your load hits that. There is no constant power feature on the supply that called it POWER MODE - I think it was B&K.
     
    TAKYMOUNIR likes this.
  7. crutschow

    Expert

    Mar 14, 2008
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    If there is a true "Power Mode" in a supply it would adjust the voltage to keep the output power constant independent of load. The Voltage Mode keeps the output voltage constant independent of load.

    WHY ARE YOU SHOUTING?
     
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