Yes but,
The new way is DC. Hydro Electrc now sends DC overhead. They are proposing
sending it from Canada to Boston and New York in DC and using giant
inverters to AC for the grid.
I imagine they got this idea from the wind generator product. Those giant
wind generators are DC on top and in the base it is inverted to AC and then
put on the grid.
Sincerely,
Mark Grasser -
Bill Dube wrote:
> AC, not DC powered. Transformer changes ~13 kv distribution voltage
> down to 480 vac.
>
> Cord reels ("coils") consist of three conductor wire with current
> flowing equally in both directions, so there is no inductance
> associated with the "coil". Thus no inductive heating from the AC.
Bill has it right. When you have equal and opposite currents flowing in the
wires, their magnetic fields (largely) cancel. Thus, the inductance
(largely) cancels out.
There wouldn't be an inductive problem with DC in the cable, either. But
arcing would be in case of trouble, and changing the voltage gets a lot
harder. You want as high a voltage as possible in the cable, to minimize the
size of the wire and its resistive losses. But motors and motor controllers
are easier to build for lower voltages (and higher currents). Transformers
are the easiest way to deal with this.
--
Don't worry about people stealing your ideas. If your ideas are any good,
you'll have to ram them down people's throats. -- Howard Aiken
--
Lee Hart -- see my EV projects and Balancer at
www.sunrise-ev.com/Balancer.htm
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