On 04/14/11 9:49 AM, Brunner, Brian T. wrote:
> UPS and Power Supplies are not all the same.
> If the UPS has a stepped voltage output (not smooth sine wave like the
> local public grid has) in large enough steps to mess up the power
> supply, you wind up with no UPS in effect.
>
> CLEARLY if there are enough steps to the stepped output of the UPS
> (which depends on the UPS brand/model), the PC power supply happily will
> see it as a sine wave input. How many is "enough" depends on the power
> supply and the load.
switched PC/Server PSU's *so* don't give a bleep about sinusoidal power,
its not funny. first thing they do is full wave rectify the power to
DC, then they run that DC through a high frequency (several 100Khz
usually) oscillator and into a toroidal transformer. they would be
perfectly happy running off a full squarewave
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