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Forum: Tech Log

16th Aug 2016, 01:51

Replies: 81

115V/400Hz

Views: 39,694

Posted By MurphyWasRight

I think EDDT's point was that shavers tend to...

I think EDDT's point was that shavers tend to work as expected when connected to the dedicated 'shaver' outlets. I suspect there must be a 50/60hz inverter on those for this to be the case.

BTW:...

Forum: Tech Log

15th Aug 2016, 11:57

Replies: 81

115V/400Hz

Views: 39,694

Posted By MurphyWasRight

Most modern 'wall warts' use high frequency...

Most modern 'wall warts' use high frequency switching supplies, in these the first step is to convert the incoming power to DC. That is why they work just fine at 400.

As to shavers, good...

Forum: Tech Log

13th Aug 2016, 18:53

Replies: 81

115V/400Hz

Views: 39,694

Posted By MurphyWasRight

On why 400hz The original reason was a tradeoff...

On why 400hz
The original reason was a tradeoff between weight ( higher frequency is better) and iron core losses due to hysteresis where lower is better. At the time initial systems were designed...

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