4 kW DC excited synchronous motor

Discussion in 'Sensors and Actuators' started by luc28, Mar 10, 2018.

  1. luc28

    luc28

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    Hi,

    for a project at my university, I am currently searching for an electric motor with the following specifications:
    • synchronous 3-phase motor
    • power of around 4 kW
    • DC-excited (important!!)
    We actually want to use it as a generator.
    During the whole last week, I already searched a lot of sites and a lot of manufacturers, but I was unable to find any motor meeting all the requirements. Either they are permanent-excited models or they have a larger power rating.

    Could anybody point me in the right direction, to a manufacturer or supplier maybe?

    Thanks,

    Luc
     
    luc28, Mar 10, 2018
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  2. luc28

    Minder

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    You don;t say whether voltage is important?
    If this is just for demonstration/exercise purposes you could look at a automotive alternator, bit low on the desired, current but another source is shipboard alternators.
    M.
     
    Minder, Mar 10, 2018
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  3. luc28

    luc28

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    The voltage is the standard european one, so 380V phase-to-phase, or 220V phase to ground.
     
    luc28, Mar 10, 2018
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  4. luc28

    WHONOES

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    A car alternator would be single phase but I guess you could run 3 together but then there would be issues with phase relationship.
     
    WHONOES, Mar 11, 2018
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  5. luc28

    Minder

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    Never seen a 1ph auto alternator??
    All the ones I have owned in the UK and N.A. are all 3 phase, this for some decades now..
    The OP is looking for a high voltage version evidently..
    M.
     

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    Minder, Mar 11, 2018
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  6. luc28

    WHONOES

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    Fair enough. I do know though that it is possible to get substantial voltages from car alternators.
     
    WHONOES, Mar 11, 2018
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  7. luc28

    Minder

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    If you run the field unregulated you can easily achieve in excess of 50vDC, I have done a few bench exercises with them.
    As is normal in many generators, I tried to use self excitation but did not work.
    M.
     
    Minder, Mar 11, 2018
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