Posted by JMOR on September 22, 2009 at 08:42:36 from (72.181.156.161):
In Reply to: Generator on M posted by 728171 on September 22, 2009 at 07:22:15:
ScottyHOMEy said: (quoted from post at 11:00:18 09/22/09) To the other part of your question, yes, the lights should be running off the L(oad) terminal on the regulator. In theory they look like parallel circuits, so I don't know what difference it would make, but then I don't grasp all the mysteries of what all happens in the internals of a regulator, either. I'd try the simple step of switching the lead for the lights over to the L terminal first see if that fixes it before I got into the third brush.
Follow the link to the very useful page, bookmark it, then have a look at #2 and #6.
The difference that it makes is that any loads connected to load terminal will receive generator current directly from the generator without the regulators current sensing circuits knowing anything about it. In other words the current regulator function will ONLY apply to the generator current going into the battery, totally independent of any loads being supplied via the L (load) terminal. Imagine a lighting load so large that the lighting current plus the battery charging current is so large when combined that it exceeds the regulators current limit. If those loads are connected to the battery, this combined load is the way the regulator senses and controls generator maximum current & would cut back on field current & thus generator output to stay within the design current limit. However, when those lighting loads are connected to the load terminal, the regulators current sensing function does NOT see that current, rather it sees only the current applied toward re-charging the battery and allows the generator to do its best to support both loads.
The scheme appears to do nothing to protect the generator from current overload, which may be why it fell from grace over the years.
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