I live on a boat. The main alternator will be belt driven from a diesel engine. I have 2, 110A 28V alternators, one of which which will be run at >4000RPM. Engine coolant is used to heat radiators in the cabins, 230V alternator will power a heater element in the coolant for more heat, and quicker warm-up for the engine. For wind power, I have a 1.8m 3 bladed turbine ( I may add a 2nd turbine in front of the 1st) , which will belt drive the 2nd alt, at probably 1:3. A minor complication of living on a boat in a tidal harbour is that the whole windy assembly will have to be balanced as the boat leans over substantially when aground.
Further power systems will be a small petrol engined, standby generator, again, belt driving a smaller automotive alt. Another, this time, ex army 80A 24volt driven off one of my propulsion engines. Yet another (yet to be acquired), will be driven off the 2nd prop' engine. Quite a system to manage !
Can anyone suggest what the comparison is between the electromagnet in the regular alternators, and a PM using Neo' magnets of the same volume.
How about 1/2 the volume, with iron (and coil) making up the rest of the space.
Shane