Can a VFD be used to power a rectifying power supply

Discussion in 'General Electronics Chat' started by Kinoton, Mar 1, 2015.

  1. Kinoton

    Thread Starter New Member

    Jan 20, 2014
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    Hello , I'm hoping someone can advise me . I have a cinema projector that uses a 1000w xenon lamp. This lamp requires a DC power supply of 24vdc at around 40A. I have an Irem rectifying power supply that is suitable for this purpose but it requires a 3 x 415vac 3 phase supply. It is rated as follows
    IREM Rectifier Power Supply for Xenon Arc Lamp - N3-X50DM

    Input AC 3.PE CL1 - Range: 342-418U - Frequency: 48-52Hz - Power: 2.6kVAmax -

    Output DC - Range: 18-28V 30-50 A- No-load Voltage: 85V -

    I don't have 3ph available so My question is am I better off finding a VFD to power the existing rectifier I have , or would it be better to disregard the 3 ph rectifier and find a single phase rectifier ? If a VFD is an option could someone recommend a model to me?

    (Forgive me if this is a silly question ) I'm assuming the single phase rec would have far lower running costs in terms of power consumption , than using a 3ph rect powered by a VFD ?

    I'm based in the UK.

    Any advice will be gratefully received.

    Best wishes

    Jon
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
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    I am puzzled a little by the no-load voltage of 85v?
    Does the lamp system require this or will it operate at the rated voltage of 18-28v?
    You could possibly use a 1ph transformer off of 1ph supply and run a bridge on the secondary I don't think you would need any cap smoothing in this instance.
    Either off of 240v 1ph or off of two of the phases.
    A 2Kva transformer should be OK.
    Max.
     
  3. Kinoton

    Thread Starter New Member

    Jan 20, 2014
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    Hi Max,
    I'm puzzled by this too , I'm just quoting from the plate on the rectifier ?!
    Jon
     
  4. MaxHeadRoom

    Expert

    Jul 18, 2013
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    The lamp data would be the one to go by?
    24v @ 40amp is 1kva.
    Max.
     
  5. MaxHeadRoom

    Expert

    Jul 18, 2013
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  6. Kinoton

    Thread Starter New Member

    Jan 20, 2014
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    Thanks Max, much appreciated. I think the no load volts might well be for the lamp ignition system ?
    Jon
     
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