10 Dec
2004
10 Dec
'04
5:01 p.m.
At 09:24 AM 12/10/04 -0700, you wrote:
Jules Richardson wrote:
I think you have it backward. The motor speeds are the results of the
line frequency not vice versa.
Out of interest, why do we use 50Hz power in the
UK and 60Hz in the US?
(I don't mean why are they different, I mean why those numbers)
I saw yesterday a claim that the 60Hz in the US was a Tesla invention,
but the info didn't elaborate on why he chose that figure if so...
It has to deal with big heavy rotating machines, so that works out to
3000 rpm in the UK and 3600 rpm in the USA for a typical motor. What telsa did invent was a better electric motor.
Telsa did a LOT more than invent a better electric motor. You should go
read up on him and his work sometime. It's fasinating. FWIW the "better"
electric motor was a LOT more than just better, it was revolutionary.
Joe