Hi Andrew, It depends on what kind of generator, but there are definitely other significant factors, such as the winding inductance. For example, I have a brushless permanent magnet motor here which can be spun at up to 4000 RPM, at which point it generates a phase to phase output voltage which is a sinusoid with a peak amplitude of 50 volts. The winding resistance is about 0.1 ohm. However, instead of 500 Amps output, the most I can get (at ANY RPM) is about 40 Amps, because once I get to a high enough cycle frequency to get significant voltage, the inductance has a reactance which is greater than the resistance. Sean On Fri, Feb 18, 2011 at 7:25 AM, Andrew Wood wrote: > Can i work out how much current a particular generator can create at a gi= ven RPM by measuring the resistance accross its terminals, driving it at th= e RPMs Im interested in and measuring the voltage then just putting the fig= ures into Ohms Law? > > Andrew > > Sent from =A0iPhone > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .