Did anyone get anywhere with this? I am looking into it now,
I've plotted my points on the graph and extrapolated to get windage and friction losses.
However struggling to find the no load magnetising power loss.
Aware that the power taken from the supply is virtually equal to the core...
How about a shunt wound generator, for example...
the output voltage is 200V
the Ia is 50A
the Ra is 0.03ohms
E=V+IaRa
E=200+(50X0.03)
E=201.5
The speed of the generator is now reduced by half. As the speed of the generator is directly proportional to the EMF, half the speed will mean half...
I'm confused as I'm aware speed is directly proportional to the EMF, but is it proportional to the voltage as well? If the speed of a DC generator is halved and everything else is remaining constant the EMF will have so will the output voltage half