D.C. pumps and motors... [RE-wrenches]

[Carl Emerson]

Hullo there...

I have noticed that it is getting harder to obtain DC pumps and DC motors in
general.

There used to be quite an efficiency advantage over AC but recent
developments in inverter efficiency and motor design would seem to have
resulted in a swing back to AC and in fact some prominent DC motor
manufactures are closing shop.

I would appreciate some discussion about this. Clearly the DC option allows
the inverter to remain asleep while pumping. Have DC motors had their day ??

Appreciate your comment...

Carl Emerson
Manager
FREEPOWER LTD.  "Harnessing Natural Energy"  Auckland, NEW ZEALAND.


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