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sinewave power

Discussion in 'Hobby Electronics' started by crazy frog, Mar 16, 2006.

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  1. crazy frog

    crazy frog Guest

    if i have a squarewave gen set and
    i need sinewave for 240v, how do i
    convert from square to sine?

    i have a active line filter it has a
    isolated transformer with 2 more
    windings with some large caps.
    its sinewave

    will it putt out sinewave from a square wave
    gen set or do i need a sinewave genset.

  2. Guest

    Excuse my ignorance but doesn't the generator in the "gen set" put out
    a sinewave anyway?
  3. crazy frog

    crazy frog Guest

    its an old genset 25 years old brushes slipring type
    dunlite, today ive seen some for sale new
    with earth magnet's makeing them sinewave.
    with no regalators or brushes in them, makes them
    good for electronics and computers.
    these gens are sold at rusco tools and paints
    my old gen uses a triac type regualator.
    it destroid a audomation switch, or it
    maybe the spikes from the brushes that
    di it.
  4. Mark Harriss

    Mark Harriss Guest

    That old Dunlite is probably putting out an
    "Imperial" sine wave which is not compatible
    with your "Metric" sine wave equipment.
  5. crazy frog

    crazy frog Guest

    is there a way to convert square to sine
    with a hand full of components for 240ac?
    if so where can i find a circuit.

  6. Phil Allison

    Phil Allison Guest

    "crazy frog" <

    ** NO !

    ....... Phil
  7. Guest

    Not a handful of components, but a couple A5 sized PCBs.

    You could full wave rectify your output and feed the resulting high
    voltage DC into the sinewave converter section of Silicon Chip's old
    sinewave inverter in Dec '92 issue.

    Suspect it'll be cheaper to buy a new generator though.
  8. crazy frog

    crazy frog Guest

    yeh i think so to.

  9. Mark Harriss

    Mark Harriss Guest

    Hi Crazy, I'm curious about this gen set you have
    is it outputting 240 volts AC with a square wave
    output?. I've never heard of such a set before and
    wonder if it might do that when the output is lightly
    loaded and then go to a sine under some kind of load
    say a few hundred VA or so.

    How do you know it's square wave in the first place?.
  10. Who are WE?

    Who are WE? Guest

    Maybe he has inverter?
  11. crazy frog

    crazy frog Guest

    its triac regulated and if not squarewave
    it maybe modified sinewave but my electronics
    dont like it, im upgading to a 5kva earth magnet
    type, no brushes or electronic regulator as my 2kva is not up to it.
    brushes make spikes. it maybe the type of regulator it has
    is the prob.
  12. Mike

    Mike Guest


    Nice one !

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  13. Mark Harriss

    Mark Harriss Guest

    Usually the regulation changes the field current and the output
    is a clean sinewave: slip rings shouldn't cause massive amounts
    of noise in an alternator: what's it look like under load with a
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