Hi Sean Would a DC generator suffer from that to the same extent? Andrew Sent from iPhone On 18 Feb 2011, at 13:17, Sean Breheny wrote: > Hi Andrew, >=20 > 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. >=20 > Sean >=20 >=20 > 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 g= iven RPM by measuring the resistance accross its terminals, driving it at t= he RPMs Im interested in and measuring the voltage then just putting the fi= gures into Ohms Law? >>=20 >> Andrew >>=20 >> Sent from iPhone >> -- >> http://www.piclist.com PIC/SX FAQ & list archive >> View/change your membership options at >> http://mailman.mit.edu/mailman/listinfo/piclist >>=20 >=20 > --=20 > 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 .