piclist 2002\09\03\102424a >
Thread: The real history of why 60Hz and much more
www.piclist.com/techref/index.htm?key=real+history+why
picon face BY : Morgan Olsson email (remove spam text)



Hej Jim. Tack för ditt meddelande 14:37 2002-09-03 enligt nedan:
>I don't understsand what point you're trying to
>make

No point, just seeking what is good and bad for different systems.

And i do´nt think some systems used 25Hz or 16 2/3 Hz just because they where stupid, it probably made at least something easier=cheaper.  For example higher freq on large units make higher losses (induction currents inside wires, and magnetic (re-)magnetisation in (iron)cores).

On the other hand low frequency demand lots of turns and large cores on small devices.

Interestingly 25Hz = 50Hz/2, and (16 2/3)Hz = 50/3, so rotatig synchronous electromachines can easily convert between thoose three.

Agreed, three phase is very neat and make distribution, motors, etc more efficient.  Three phase is AFAIK used in every building in Europe, 3x230. (measured phase-neutral)  All phases used by stoves, washing machine etc, and regular outlets use one phase + neutral.

/Morgan

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