So I recently became interested in converting an automotive alternator into a DC motor. Google was helpful, but I had to get the info by bits and pieces from various places. I decided that I'm going to go ahead and convert an alternator, AND document it from start to "magic smoke". I really just want to explore the idea, learn some, and leave behind a record for the next poor schmuck who decides to try this. So.........
I'll be using a 3G (3rd generation) Ford 130 amp alternator. Because, A: I have one (free), and B, I really like the big heavy mounting lugs on the case. If I do mount it to something, then that'll be super handy.
To see what and how it shakes out. The basic plan is to duplicate what I've seen done before, and then try to step it up from there in terms of output. At least until magic smoke occurs.
So stage one will basically be a physical modification of the Alternator into Alter-motor, and getting that moving. I have already ordered a RC type Speed Controller (HobbyKing WP SC8). It's rated at 120 amps, and 2-4 lipo batteries. That's a really poor (IMHO) way of rating voltage, it basically works out to 14.4 volts max. As I'll start with a 12 volt lead acid battery, that should be fine. Upgrades may be necessary in the future. First it's gotta work. 120 amps at 12 volts is 1440 watts. Roughly. Real world doesn't always work that well. We'll see.