Hi George.

01-Oct-03 19:21:51, George White wrote to Jasen Betts


 GW> Hi Jasen,

 GW> On 29-Sep-03, Jasen Betts wrote to Greg Mayman:

 GM>>> Yes, I still have one of those regulators. It was used on most
 GM>>> DC generators. An early form of pulse width modulation of the
 GM>>> generator field. I don't recall ever seeing it on alternators,
 GM>>> but it could have been used -- it would work just as well on a
 GM>>> rotating field as on a fixed one.

 JB>> I use one here the built-in regulator on my altenator died,
 JB>> twice.. and external reegulators are much cheaper.

 GW> And if installed correctly, usually better performing... If you
 GW> ever feel like building one I can help with the design.

yeah,

what I've got so-far is a wire from the battery through relay contacts
to the D terminal of a generic off-the-shelf regulator
and and fron the F termianl to the filed terminal on the altenator, the
relay is driven from the ignition switch.

it works OK, and the lack of a warning light isn't as big issue as there's
a voltmeter in the instrument cluster and the altenator belt drives only
the altenator.

the only problem is it doesn't charge hard enough under extreme conditions.
(idling with wipers, fan, brake, and headlights operating)

 GW> If the external regulator is done properly you should be able to
 GW> use the field supply from the alternator (the extra half bridge).
 GW> All the ones I worked on did...

cool, I've not seen any like that, I've not looked real hard though.

 -=> Bye <=-

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