I want to create bike-powered alternator system to recharge 12 V batteries. People can only do about 300 W mex.
To turn an alternator with higher torque requirements, especially when the battery it is connected to has a low charge, won't work. Can I "trick" the alternator to be in a range that can be peddled by having a separate circuit branch between ground and the voltage regulator input terminal that would give me the ability put in a voltage independent of the battery? In this way, I can adjust the alternator load requirements to match the maximum peddle power available.
I thought I could put a 12 V and 6 V battery in series with a rheostat connected to the ends and adjust the voltage output to the alternator.
I wonder if a second option would be to have different voltage diodes controlling a transister to give me different voltage outputs in 11.5 V - 15 V range. I plan to have a voltage, current, current power and total power monitor on the line to give me the feedback I need to make this work.