| nighthawk 550 electrical problem [message #475612] |
Thu, 13 October 2005 11:06 |
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R. Pierce Butler Wrote:
> Mark Olson olsonm [at] tiny.invalid wrote in
> news:11kieavbtbqovaf [at] corp.supernews.com:
> -
> R. Pierce Butler wrote:-
> jlpridge jlpridge.1wm8kp [at] news.motorbikebanter.com wrote in
> news:jlpridge.1wm8kp [at] news.motorbikebanter.com:-
> --
> Well I found out why the stator failed the open circuit test.
> My bike does not have magnets on the rotor. The black wire and the
> white wire are a positive and negative lead that provides 12 volts to
> I believe excite the field or stator providing the magnetism which
> normally comes from the magnets and without power to those two wires
> there will be no ac output. Nonetheless the stator is bad because the
> the resistance on the those two leads is 1 ohm when the specs say
> that
> it should be 4-6 ohms. I found I shop that had one for $65 and it
> should be here wednesday.--
> -
> To be honest I am a little surprised you didn't see any brushes when
> you took it apart. Is it possible the brushes are so badly worn you
> can't see them unless you know what you are looking for?-
>
> THERE AREN'T ANY BRUSHES, YET IT _IS_ AN EXCITED FIELD ALTERNATOR.
> -
>
> You are right. There aren't and I realized that after I posted.
> Trying to
> carry on two conversation and post to usenet just doesn't work well.
>
> pierce
The Saga continues... Eureka! The $65 stator works great!!! At
3000rpm the votage at the battery is 14 volts. This increases up to
14.8 or so as the rpms increase to 5000. The fix took only about 10min
to install and now the bike is doing fine. I cannot tell you all that
have offered assistance how much I appreciate it. Thanks so much!!!
Jeff
--
jlpridge
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| Re: nighthawk 550 electrical problem [message #475620 ] |
Thu, 13 October 2005 18:55 |
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jlpridge wrote:
> The Saga continues... Eureka! The $65 stator works great!!! At
> 3000rpm the votage at the battery is 14 volts. This increases up to
> 14.8 or so as the rpms increase to 5000. The fix took only about 10min
> to install and now the bike is doing fine.
Progress at last. You may not be completely out of the woods yet...
Does the voltage rise to the peak voltage specified in your manual and
then drop off? Or does the voltage continue to rise?
The voltage regulator in an excited field alternator has a large
transistor that is supposed to switch the excitation voltage on and off
at certain levels.
There has to be a reason why the excitation coil in your old stator
shorted out. It may be that the voltage regulating part of your RR
wasn't working right and the RR kept sending voltage to the exciter
coil continuously, burning it out.
Also, keep an eye on your battery water, if you have a non-maintenance
free battery.
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| Re: nighthawk 550 electrical problem [message #503756 ] |
Mon, 07 November 2005 01:12 |
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On 13 Oct 2005 09:55:05 -0700, "krusty kritter" <kriyamanna [at] aol.com> wrote/replied to:
>Does the voltage rise to the peak voltage specified in your manual and
>then drop off? Or does the voltage continue to rise?
>
>The voltage regulator in an excited field alternator has a large
>transistor that is supposed to switch the excitation voltage on and off
>at certain levels.
For sure, it's not normal for the Voltage to stay high. After a start, the battery needs to be refilled, so the voltage
will rise to 14 volts or more, then after a short time the Voltage should drop to about 12.8 volts.
It depends on the condition of the battery of course, this is for a good battery.
If the voltage stays high, the battery could be toast, or the regulator is not working. Definitely check it out, or
you'll fry more than the alternator. Bulbs don't like voltage that high so if you've been blowing some bulbs, you've
definitely got a problem.
--
Jim Davis, Owner, Eastern Beaver Company:
http://easternbeaver.com/ Motorcycle Relay Kits
Powerlet, Posi-Lock, Parts, Info, Photos
K100RSes on both sides of the planet!
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