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@REPLYADDR Jim Wilkins <muratlanne@gmail.com>
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"Gerry" wrote in message news:
3lhchid8q6ln5r03p32od5do0atpb7jatj@4ax.com...
I think it was aroun 1950 when Toronto and a large surrounding area
switched over from 25 to 60 Hz. I remember visiting Mother`family and
noticing how thier ligts all blinked. It cost the supplier a fortune
to replace all the affected equipment!
-----------------------------
https://www.djtelectricaltraining.co.uk/downloads/50Hz-Frequency.pdf
I don`t have references that explains why aircraft chose 400Hz to reduce
iron core weight and electric trains, the biggest early users, used 25Hz for
some good reason. Fukushima couldn`t get enough Diesel generator and
external power for the reactor cooling pumps at their frequency or
supplement it with power at the other frequency, which the media
misunderstood and reported as a problem with incompatible plugs.
The sine function is a one-dimensional representation of rotation at
constant speed, such as the height of a bicycle tire valve when the wheel is
coasting, neither gaining nor losing speed or energy. Thus it`s the AC
equivalent of a steady state. The cosine is the same, at a right angle to
the sine, and the two together define and can recreate a circle, and as
electrical waveforms they can transmit and fully reconstruct rotary motion
theoretically without loss.
Single phase AC is like power from bicycle pedals that only push up and down
and need a boost to get started, which extra start windings in a motor
provide.
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