Re: Voltage Regulation, Re: 1959 Starflite

[legendre]

@RVPapasso

Very good explanation.. and yes, I’m familiar with that type of solenoid. It’s a two-winding coil with the standard pull-in winding and a second ‘bucking’ winding that swiftly cancels the flux from the first, when the current reverses. I don’t recall the proper term for this design.

I’ve seen this sort of design in other industrial controls where relay hysteresis is an issue, as you point out that it would be in a mechanical reg cutout. But I’d never thought about the fact that they were used in this application.

Nice bit of education for all, thanks for taking the time.

quote FrankR:

Can’t we just say the cut-out relay disconnects the generator from the battery when it isn’t putting out enough voltage to charge the battery?

Yes, that’s the gist of it. It’s just that a conventional relay isn’t up to the task, for as RVPapasso points out, it has too much hysteresis.

quote :

Yes, if it were not disconnected under such a situation, the battery would discharge through the generator. And it also is why the generator doesn’t charge the battery at all until it is running fast enough to close the relay. Think relay and not diode and the mystery goes away.

The current regulator section is what limits the maximum generator output in Amps (10).

The voltage regulator section is what controls the charging voltage (about 14.5 Volts)

Correct again, on all counts.