Good reading material on generator design

[threeReefs]

Any pointers to good books or downloadables on generator design? Particular different types of voltage regulation... I was offered a genset recently with "capacitor excitation/voltage control and I'm struggling to find anything on how that actually works. Apparently it's not particularly efficient, but fairly effective. A general backgrounder would be really valuable.

Maybe I'm being lazy and could piece this together from lots of web pages but I've been trying for a while and it's surprisingly hard !

TIA
Richard

[Henry W]

I'll put out a message to our founder.