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AC vs Inverter Sine wave

Discussion in 'Misc Electronics' started by emma, Jun 28, 2005.

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  1. emma

    emma Guest

    In an Alternating Current system, the electrons oscillates back
    and forth. In Power Inverters (where you convert DC to 110
    volts AC), the output is just a sine wave.. meaning the
    electrons don't really oscillate back and forth but only vary
    in intensity in time. What is the effect of either on the load? Are
    their Power Inverters where the electrons can also
    oscillates back and forth like in the AC?

  2. CWatters

    CWatters Guest

    I think for your purposes you can assume there is no real difference between
    the AC you get from a wall socket and that produced by a mains inverter. The
    electrons behave similarly for both.

    Some mains inverters don't produce very pure (smooth) sine waves and that
    can cause problems for sensitive equipment like radios.
  3. emma

    emma Guest

    What do you mean the electrons behave the same. In the Alternating
    Current. It goes forward and backward in time, while in the Inverter,
    it goes forward only. Isn't it.

    The drift velocity of the electrons are slow. In AC, how can it
    have enough time to go forward and backward.

  4. CWatters

    CWatters Guest

    No a Mains Inveter (if thats what you mean) is a device that converts 12V DC
    to 110V AC to provide power for tools etc when you don't have a wall socket
    handy (eg in the middle of a field). In other words it's output is similar
    to what you get from a wall socket.
    Because they don't move very far. They mostly just sit there and vibrate.
    It's like the air in a room - it doesn't move much when you play the radio.
    The sound waves and their energy go through the air but the air molecules
    just vibrate.
  5. Bill

    Bill Guest

    My understanding is that a typical DC to AC power inverter produces something
    more like a square wave than a sine wave. In fact, I have an inverter and the
    picture they show of the output is just like that except there are little gaps
    "between the squares." You can buy more expensive ones that produce a shaped
    output that looks more like a sine wave. But in addition to costing more, you
    lose more power in the conversion.

    Most devices - e.g. computers and light bulbs - respond perfectly well to the
    inverter. But some motors generate more heat because of the shape of the wave
    and you have to be careful.

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