Hi,
Just wondered if there is a fixed figure or percentage for when I spin a permanent magnet DC motor, for the amount of volts given out for a given speed?
For instance, if I have a 12 volt 2000 rpm with no-load motor, and spin it by other means up to the same rpm, 2000, how many volts will it put out?
And is this a fixed figure as a ratio to the no load RPM?
Here's what I am thinking, working forwards from the propeller:
Shaft with coupling
Thrust bearing
Mounting plate with several motors or one larger one, say, belt driven.
Shaft continues to a clutch
Then an ICE.
Like a U-Boat? I run the electric until I have some need to charge the batteries, then I run the ICE and get propulsion and recharging.
I am trying to see if it works out as practical - the idea would be to have as little time with the ICE running as possible.
It might also be able to be used without the ICE, to recharge the batteries?
John
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