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Beginners / Re: Convert US standard 115V to International 230V
« Last post by Zero999 on Today at 12:56:18 pm »Capacitor ESR decreases as frequency decrease and ESR increases as frequency increases. So whether it 50 to 60Hz or 100 to 120Hz it won't make any difference worth worrying about to output voltage ripple. This can be easily tested with any LCR meter with variable frequency. If your getting a huge change in value between 50Hz and 60Hz then the capacitor is nearing end of life anyway and needs to be changed.Irrelevant.
The problem is 50Hz will increase the ripple on the smoothing capacitor, so the voltage will drop to a lower level during the troughs. This shouldn't be a problem with a properly designed power supply, as the capacitor should be adequately oversized, but it will be a problem, if it's marginal and perhaps the voltage is also on the lower end of the operating range.