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Current Limiter needed, pls help....

Discussion in 'Hardware' started by ckwtampines, Sep 13, 2003.

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  1. ckwtampines

    ckwtampines Thread Starter

    Joined:
    Aug 25, 2003
    Messages:
    5
    Hi,

    I need to build a current limiter with the following specs, can anyone help? My current limiter has to be a max of 10A, it goes from a 3 phase altenator to some batteries. The specs are as below.

    Altenator
    KVA = 8 @ Amps 11.1
    KW = 6.4 @ Amps 8.8
    Voltage 240 V phase to neutral
    415V 3 phase
    Freq = 50Hz
    Speed 1500rpm.

    Battery
    3.7V X 90
    =333V

    Thanks
    Clement
     
  2. kiwiguy

    kiwiguy

    Joined:
    Aug 17, 2003
    Messages:
    17,584
    You need a lot more than a "Current Limiter" from reading your post. Its not as simple as limiting the alternator output connection to the batteries. The alternator is 3 phase AC. You need a single rail DC voltage.

    First you need to have a 3 phase bridge rectifier, and then a regulator circuit. This circuit would normally give the "current limiting" that you need.

    At a battery bank voltage of 333v, its likely to be a specifically designed bit of gear, and not something easily found "on the shelf".

    Depending on what earthing / Neutral arrangements exist, you may have a problem getting a DC voltage high enough to charge the batteries without a step-up transformer.

    Is the 333v nominal or charging voltage?
    Phase to Neutral rectified would give 339 v peak, less any regulator head voltage.
     
  3. zeddy

    zeddy

    Joined:
    May 3, 2003
    Messages:
    2,612
    What else you need is to post on the Hardware forum!
     
  4. JohnWill

    JohnWill Retired Moderator

    Joined:
    Oct 19, 2002
    Messages:
    106,418
    Just out of curiosity, what are you building? :)
     
  5. eddie5659

    eddie5659 Moderator Malware Specialist

    Joined:
    Mar 19, 2001
    Messages:
    35,777
    Moved you to Hardware, where you may get more replies :)

    eddie
     
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