chrisf
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| posted on 3/7/06 at 08:30 PM |
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Rectifier stats; ok?
Hi all:
After overcharging two batteries on my 98 blade due to bad rectifiers, I tested everything I could this time to make sure I would not kill another
battery. The rectifier is a UK SuperDream and I used
Shorties wiring diagram. I tested at both idle and at 5K
RPMs. Doe the following into look right?
Out of stator @ idle:
Yellow Wire #1: 3.2 Then, after warmup 6.5
Yellow Wire #2: 5.3 Then, after warmup 6.5
Yellow Wire #3: 5.3 Then, after warmup 6.8
Yellow wires out of Stator @ 5k RPMs: 4.9 across the board
Red wire out of Rectifier @ idle:
14.25; 14.5
Out of Rectifier @ 5k RPMS:
14.00; 14.1
Battery @ Rest: 12.8
Battery @ 5k RPMs 13.9; 13.83
So, how do these number look? I tested all this using a car battery because I did not want to ruin my new bike battery. Is 5k RPMs a good engine speed
to take a rectifier reading? My thought was that by 5K RPMs, the bike engine will begin to charge the battery. Should I take a reading at a higher
RPMs?
--Thanks, Chris
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mark chandler
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| posted on 3/7/06 at 08:46 PM |
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I,ve just had the same expensive experience with blade rectifiers..... one battery fried, 2 rectifiers stopped charging and one that shoves 18v.
What you should see with a new battery is around 13v minimal load (side lights), then 13.8 when charging, mine achieves this at around 2000 rpm,
increasing the revs should not increase the voltage.
When the revs drop to 1000 rpm the volts should drop back to the static level.
In real terms this means that the lights brighten a bit when you first pick the revs up, if they change significantly then thats a bad thing,
conversely no change is also bad, Mine also blew both headlights on dip and 3 dash bulbs.
Your figures look good to me, the blade manual talks about resistance across the coils sovolts across the legs is meaningless although you would
expect them to all be the same.
Regards Mark
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Hellfire
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| posted on 4/7/06 at 07:25 AM |
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Figures look good...
When engine revs increase that's when to look for danger as the voltage should not increase much above what you have at 14.1V though 14.8V I
think is maximum (IIRC)
Hope all goes well this time...
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chrisf
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| posted on 4/7/06 at 02:09 PM |
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That's very good news! Thanks for the help gents. I'll solder everything and hope for the best.
--Thanks again, Chris
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