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domestic voltage to 3 phase

  • 26-10-2011 11:29am
    #1
    Peter T
    Registered Users, Registered Users 2 Posts: 572 ✭✭✭


    Hey guys, plan on building a log splitter and have found an eletric motor for it. Problem is the motor is 3 phase for commercial application and needs a converter to be run on domestic voltage. Is a converter something that can be built or would have to be bought? (Have a bit of experinece in electro technology so im confident i could build if its possible)


Comments

  • #2
    DublinDilbert
    Registered Users, Registered Users 2 Posts: 5,421 ✭✭✭DublinDilbert


    Peter T wrote: »
    Hey guys, plan on building a log splitter and have found an eletric motor for it. Problem is the motor is 3 phase for commercial application and needs a converter to be run on domestic voltage. Is a converter something that can be built or would have to be bought? (Have a bit of experinece in electro technology so im confident i could build if its possible)

    You need an inverter to generate a 3phase waveform. What size is your motor? it will probably be cheaper to get a single phase motor as an inverter can cost a bit depending on the amount of HP needed.


  • #3
    Bruthal
    Closed Accounts Posts: 13,422 ✭✭✭✭Bruthal


    A convertor using a 3 phase idler motor can be built, but it would be tricky enough to get it generating the 3rd phase close to 120 degrees. Probably need a step up transformer as well to get 400v from the 230v before then using the idler to generate the 3rd phase.

    What size is the 3 phase motor you intend using? If its something you are going to gear down, a single phase motor might do the job.


  • #4
    mazthespark
    Registered Users, Registered Users 2 Posts: 631 ✭✭✭mazthespark


    whats the motor size?? you can get a vsd that will take in single phase and output 3 phase. we got one lately think it was around 1 hp was under 200 euro i think


  • #5
    Peter T
    Registered Users, Registered Users 2 Posts: 572 ✭✭✭Peter T


    The motor is 1.5 hp. Im not set on buying it yet but its for reasonable money. I was talking to a lecturer of mine about converters today and he has one for his lathe and milling machine at home but cost 800 punt at the time. Its a screw type splitter im aiming to build so it would just be a screw peice straight onto the shaft ie, cutting out the need for any gear or belt mechanism.


  • #6
    mazthespark
    Registered Users, Registered Users 2 Posts: 631 ✭✭✭mazthespark


    thats probably a standalone static/rotary converter capable of powering a few machines but if you only ever expect to run this particular machine or it will be mobile something smaller and cheaper may suit.


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  • #7
    Bruthal
    Closed Accounts Posts: 13,422 ✭✭✭✭Bruthal


    The vsd is a good option alright, but 1.5hp might be a bit low of a motor power for splitting logs without some sort of mechanical advantage setup.


  • #8
    Peter T
    Registered Users, Registered Users 2 Posts: 572 ✭✭✭Peter T


    Iv seen 1.5 horse power motors running them on the internet so it should be alright


  • #9
    Bruthal
    Closed Accounts Posts: 13,422 ✭✭✭✭Bruthal


    Peter T wrote: »
    Iv seen 1.5 horse power motors running them on the internet so it should be alright

    Yea it might well work alright, i just would of thought they would need hydrolic or gearing advantage. Same power motor but doing the work over a longer time, so the power applied to the work is higher and all that.


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