[url=https://www.classicgoldwings.com/forum/viewtopic.php?p=118588#p118588:2kk6h272 said:dan filipi » Tue May 20, 2014 9:25 pm[/url]":2kk6h272]
This charging system is strange and as far as I can tell, not completely understood how it operates.
It's generally said the stator and regulator/rectifier system is designed to always output 100% from the stator, and what is not used is dumped (shorted/shunted) to ground.
The odd thing I find is while idling mine, when I turn on the 2-55 watt driving lights I am certain I hear the idle slow a bit. This to me tells me the stator was NOT putting out 100% before the light load was turned on. I put an A/C ammeter on the stator wires and in fact amps do go up with the added load. A very small amount but it does go up.
With that said, I'm inclined to think reducing load with LED bulbs is best.
Dan:
I believe you are correct about the stator output current increasing as the load current increases. I have heard this idea about alternators with a PM rotor and rectifier/regulator shunting the "excess" current to ground, and I don't believe that's how it works. If it was, besides what you have observed (above), based on the physical size of the rectifier/regulator, it would burn up in about 30 seconds. No way something that small could dissipate several hundred watts without self-destroying ( burning up ) .
As an old Navy ET and electrical engineer, I bet the voltage is regulated by the regulator chopping up the stator output with an ON-Off ratio just right to maintain the regulated voltage and supplying the correct load current.