Make 3 phase motorcycle stator as engine starter

[TomGeorge]

@agimrizal

at that time, with the spark plug in position, the rotor could only rotate at about 20 rpm, the current was 25a, and the voltage dropped to 10.5

What speed have you programmed into your code?
The rotor will only spin at the speed set by the ESC code.

What is the alternator rated at, Amps?
As I said, not designed for what you want to do.

Tom...