Stator Output and Charging System Performance
Posted: Tue Dec 29, 2020 9:11 am
Here's what I had bookmarked from an earlier post by @gliderpilot. I can use a 65W heated jacket liner and a pair of 20W heated gloves or heated grips and it works okay. I've also replaced my headlight bulb with a LED model to free up some more electrical power, so I wouldn't drain the battery during this cold winter's commute. The post is below.
All US models, according to my manual...
No load, regulated voltage: 14.3 to 15.3 volts, at 5000 rpm.
Nominal output: 14 volts, 20 amps, at 5000 rpm.
Stator coils resistance: 0.32 to 0.48 ohms, at 20 deg C/68 deg F.
The output equates to 280 watts (14 times 20), which is not bad going for our little bikes...
I roughly worked out that the current draw for running at night (at least on a '95 UK model), ie: headlight full beam, running indicators occasionally, braking, etc, was about 10 - 12 amps, leaving roughly 8 amps max to play with. That would allow an additional 90-odd watts (8 times 12 approx) available for heated vests, spotlights, etc.
(My caveat is that THAT was a rough calculation, and would of course drop when idling, so don't take my figures as gospel: check your own bike, folks!)
All US models, according to my manual...
No load, regulated voltage: 14.3 to 15.3 volts, at 5000 rpm.
Nominal output: 14 volts, 20 amps, at 5000 rpm.
Stator coils resistance: 0.32 to 0.48 ohms, at 20 deg C/68 deg F.
The output equates to 280 watts (14 times 20), which is not bad going for our little bikes...
I roughly worked out that the current draw for running at night (at least on a '95 UK model), ie: headlight full beam, running indicators occasionally, braking, etc, was about 10 - 12 amps, leaving roughly 8 amps max to play with. That would allow an additional 90-odd watts (8 times 12 approx) available for heated vests, spotlights, etc.
(My caveat is that THAT was a rough calculation, and would of course drop when idling, so don't take my figures as gospel: check your own bike, folks!)