Need Charging System Genius ! Actually Easy
Thread Starter
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Cruiser
Joined: Aug 2008
Posts: 118
Likes: 1
From: SEMO USA
Need Charging System Genius ! Actually Easy
Hey Ya'll, as always Thanks to Ya'll here on HDforums.
Question for Genius
Wont charge.
Went through the checklist in the sticky's,
no voltage increase at battery, ground and connection form regulator good
25vac at stator at idle
Light Bulb goes on!!
Has to be the damn regulator again
Replace the regulator...Still not charging [ much swearing ]
Run thru checklist again...all the checkpoints
Stator fails windings to ground, passes continuity test
still has 25vac at stator
Can a stator that is putting out voltage be defective?
How the hell can a shorted stator put out voltage at connector [ very confused ]
Has my stator failed or did I miss something?
Bike is a 2002 FLHTPI w/ 45 amp charging system
HELP
Question for Genius
Wont charge.
Went through the checklist in the sticky's,
no voltage increase at battery, ground and connection form regulator good
25vac at stator at idle
Light Bulb goes on!!
Has to be the damn regulator again
Replace the regulator...Still not charging [ much swearing ]
Run thru checklist again...all the checkpoints
Stator fails windings to ground, passes continuity test
still has 25vac at stator
Can a stator that is putting out voltage be defective?
How the hell can a shorted stator put out voltage at connector [ very confused ]
Has my stator failed or did I miss something?
Bike is a 2002 FLHTPI w/ 45 amp charging system
HELP
Thread Starter
|
Cruiser
Joined: Aug 2008
Posts: 118
Likes: 1
From: SEMO USA
[ more swearing ] A little more research answered the question:
A stator that is shorted to ground may still produce full AC voltage from pin to pin. The problem with this is the rectifier changes the AC current to DC current and then uses the ground as one leg of the DC. When the stator shorts to ground the AC and DC get mixed together.
Thank You Cycle Electric Website ( good Info there )
A stator that is shorted to ground may still produce full AC voltage from pin to pin. The problem with this is the rectifier changes the AC current to DC current and then uses the ground as one leg of the DC. When the stator shorts to ground the AC and DC get mixed together.
Thank You Cycle Electric Website ( good Info there )
Seasoned HDF Member
Joined: Aug 2008
Posts: 5,071
Likes: 1,006
well, it is not as simple as that.
https://compufire.com/instructions/55403.jpg
yes, the dc and ac will share the ground, IF the stator is shorted to ground, issue is that the ac current is shunted to ground before it even reaches the regulator. that said, the diodes will either have enough bias or fwd current to conduct and send dc to regulator component or not. these really not mixing per say. why do i say this?? well, if the protection circuit in the regulator gets activated (usually normal load prevents this) the AC component gets shunted to ground (through the regulator) , NOT the dc component within the regulator, so this is a NORMAL occurrence which does not effect charging unless the protection circuit snafu's. why?? well heat shed (amperage is less) than dc shed. the newer regulators use switch mode and just shut down (aftermarket).
measuring from pin to pin is at the pigtail. if you have a meter capable of catching it, you can tell which winding of the three has the short to ground. now for inter-winding short (between layers) very difficult to catch with a meter and ohmage is low to begin with. there is a tool that can help but in the wrong hands, toast for the stator and that is a megger.
https://compufire.com/instructions/55403.jpg
yes, the dc and ac will share the ground, IF the stator is shorted to ground, issue is that the ac current is shunted to ground before it even reaches the regulator. that said, the diodes will either have enough bias or fwd current to conduct and send dc to regulator component or not. these really not mixing per say. why do i say this?? well, if the protection circuit in the regulator gets activated (usually normal load prevents this) the AC component gets shunted to ground (through the regulator) , NOT the dc component within the regulator, so this is a NORMAL occurrence which does not effect charging unless the protection circuit snafu's. why?? well heat shed (amperage is less) than dc shed. the newer regulators use switch mode and just shut down (aftermarket).
measuring from pin to pin is at the pigtail. if you have a meter capable of catching it, you can tell which winding of the three has the short to ground. now for inter-winding short (between layers) very difficult to catch with a meter and ohmage is low to begin with. there is a tool that can help but in the wrong hands, toast for the stator and that is a megger.
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