Slightly off-topic: generator voltage/frequency regulation

I know it isn’t arduino related, but it is electrical related.

I have attached a PDF of the schematic for my generator. it seems fairly simple, but i don’t recognize in it how it regulates voltage and frequency.

just curious, really.


Generac-SE5000_schem.pdf (230 KB)

There must be a motor governor of a kind.

Haven't followed any discussion here what you have.
Link to the model?