I'm about to start a project using a car alternator rewired as BLDC motor, I think in VESC terms this will be considered a large inrunner. Alternator doesn't have permanent magnets so I plan to engergise the field coil with 12V supply, although I may experiment with varying this, I've understood higher V on field coil will mean higher amps which will mean stronger field = more torque, lower speed, or vice versa - hence this is interesting variable but I presume there is an optimum value where I'll get most overall power out of the system and after that resorting to mechanical gearing will be optimum.
I'll also be experimenting with the alternator phase coils wired in Delta Vs wired in Y (star) configuration.
Assuming initial bench tests go ok I'll continue to try to determine through experiment the effective KV of the motor (for a given field coil voltage), determine torque for a given Voltage / current, and stall torque etc.
If the alternator can provide enough power as a motor then I want to use it to power a pedal go kart, if I can determine some parameters for the motor I can then think about gear ratios...
I'm interested in any Advice on how how to design experiments to measure the values of the motor and any advice or thoughts anyone has for a newcomer to VESC configuration and especially considering my slightly different use case - primarily advice on how not to blow up my nice shiny VESC6 device.. (I understood lowering default erpm value is a good start, and of course watch temperatures like a hawk).