Attached is a simplified diagram of my motorcycle's charging circuit. It has a standard 3-phase bridge rectifier circuit--simple enough.
I'm confused about two things: (1) How is the voltage regulator regulating the voltage here as only one phase is connected to the regulator which appears only to have a ground? and (2) How does this regulator function? All the example regulator circuits on the internet are either linear regulators or zener diode reglators. This one seems to involve a thyristor and a diode?