Since Paul & Sabrina seem to have made EcoModder the center of DIY controller development
this would seem to be the appropriate forum for a thread for a DIY alternator controller.
I have been planning to build a reverse trike using twin alternators for power and from what I've found on the web people are using them as motors controlled by RC escs. There are claims of power up to 5 HP.
I envision a 10kw max bldc controller with provision to vary the rotor current to control torque. Higher current at low rmps increases torque.
If I missed something in my forum search please direct me.