13 Oct
2013
13 Oct
'13
2 a.m.
On 10/13/2013 01:22 AM, Holm Tiffe wrote:
OMG...in almost the entire world PSU's are working
bad because of the 50Hz?
What about 400Hz from airplanes?
Not all airplanes--CDC used an MG set that put out 3-phase 400Hz. With
a full-wave (bridge or star) rectifier, you got mostly DC with only
about 4% ripple at 400*6 = 2400 Hz.
On the other hand, I've worked on some old (it was old when I worked on
it a long time ago) 110V 25Hz equipment. The transformers were huge in
comparison to their 60 Hz cousins and rattled rather than hummed. You
could even see flicker in incandescent lamps--mercury-vapor lamps would
drive you crazy.
--Chuck