Treacodactyl
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Modified/stepped sine wave to pure sine wave converter?I've had a bit of a search but can't find anything obvious. Is there such a device that would take a modified sine wave from a cheap generator and turn it into a pure sine wave output suitable for modern PCs, LCDs etc? If there is is there a particular name or set of terms I should search for?
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RichardW
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Why do you think gennies make square wave electric?
Square wave is made by cheap electronic inverters that chop the voltage / hertz.
You might have heard about pure sine wave gennies, they are inverter ones.
Grid elec is made by a genny (ok a big one).
(simplified explanation)
Small genies make bad sine wave. It tends to be a rough curve with jagged edges due to the RPM instability (that affects the hertz & voltage) & that they have two windings so there is some gap. Better ones have 4 windings. Big ones have more.
You need one with an AVR which regulates the voltage to a stable level.
Bigger engines are less affected by load so have more stable hertz.
You can get inverter gennies that make high volt /hertz elec that is then inverted to a stable grid type. They alter the RPM to match the load & let the inverter sort the volts & hertz. Even small ones make good elec.
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Treacodactyl
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The ones that produce pure sine wave do cost more. I assume most stuff run off a genie doesn't need pure sine wave?
Anyway, if I could get hold of a cheap non-sine wave gennie I wondered if there's a way to smooth out it's output?
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RichardW
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Well you could charge a battery & then use a pure sine inverter
To be honest as long as you are not going to over load the genny & its not a cheap 500-800 watt one a computer should work fine on it.
If your load is really small then part loading the genny can stabilise the output.
As far as I know there is no way to clean up the output.
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Graham Hyde
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The best way to produce a spike free, smooth sine wave is through a battery......
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Treacodactyl
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I had also concluded a battery and inverted set-up would work, I just wanted to confirm I'd not missed anything thanks.
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