wbhokie
Member
Thank you sir.Well, keeping the line frequency at 63Hz or below is fine. And non-ECM motors are run cooler at their design frequency. So will power supplies that use a line frequency transformer. But any computer supply made in the last couple of decades is an AC to DC converter with a transformer that runs at >20kHz. AC to DC converters that incorporate power factor correction circuits have in principle a limited frequency range, but the range is broad compared to 60Hz or 65Hz. Converters that are small enough to not need PFC will operate even with a DC input. The Intel paper is describing the minimum input frequency range needed for ATX compliance; actual power supplies built today significantly exceed the range.