Re: Generators and switch mode power supplies.
- From: nico@xxxxxxxxxxx (Nico Coesel)
- Date: Thu, 05 Feb 2009 17:02:08 GMT
Sylvia Else <sylvia@xxxxxxxxxxxxxxxxxxx> wrote:
Given the parlous state of Australia's power systems, I've been
considering buying a standby generator. One marketing point of some of
the inverter based models is their suitability for 'sensitive
electronics' with computers given as an example. This appears to be
based on the fact that they'll provide a consistent sinewave output.
But given that computers invariably use switch-mode power supplies, are
they actually going to care what waveform they see - from square wave
thru 'modified sinewave' thru pure sinewave?
Not really. A computer doesn't care much as long as the voltage is
within range. One thing to consider is that computers are a bad load
to a generator. As a rule of thumb you need a generator with at least
twice the VA rating as the total VA rating of all computers. Otherwise
the generator cannot keeps its rpm constant (starts speeding up and
slowing down).
--
Failure does not prove something is impossible, failure simply
indicates you are not using the right tools...
"If it doesn't fit, use a bigger hammer!"
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