how much resistance to reduce a current of 5A (24V DC) to 2A? without changing the Voltage.
in a 24V alternator i'd like to manually (and variably) reduce the field current (5A) to 1A (in order to regulate the alternator output) can i do it with a rheostat? what kind of resistance must it have (rheostat specs)?
is output current linear to field current? 5A field = 75A output, 1A field = 15A output ?