The "Why" of Stator Failure? - Page 3 - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Electrical
Where does this wire go?
Includes Electrical mods, Lights, Stator,
Rectifier, Diagrams, etc

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post #21 of 30 (permalink) Old 02-01-2020, 10:13 PM
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Adding a 10,000uf capacitor to the regulator output drastically cut down AC voltage even with a new Mosfet R/R. If you have LED lighting it will greatly extend their life and it should help the stator keeping output smoother.
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post #22 of 30 (permalink) Old 02-01-2020, 10:43 PM Thread Starter
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Adding a 10,000uf capacitor to the regulator output drastically cut down AC voltage even with a new Mosfet R/R. If you have LED lighting it will greatly extend their life and it should help the stator keeping output smoother.
Did you mean to say the capacitor is on the regulator input ?

Seems like that could make the stator run hotter, but I'm not sure. If the cap is pulling the AC volts down, wouldn't that stress the stator?

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post #23 of 30 (permalink) Old 02-01-2020, 10:55 PM
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No, on the output to smooth voltage to the battery. It took ripple voltage from 150mv to less than 20mv.

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post #24 of 30 (permalink) Old 02-02-2020, 08:20 AM
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When you did the ripple measurements did you see any high energy fast transients? I would be more worried about a spike killing the LED's than the ripple you describe.

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post #25 of 30 (permalink) Old 02-02-2020, 11:30 AM
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No. Thats why I use a very large capacitor instead of the tiny little thing commonly used to help control ripple.

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post #26 of 30 (permalink) Old 02-02-2020, 12:44 PM
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The little tiny thing is a bypass capacitor intended to reduce spikes, not for ripple control

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post #27 of 30 (permalink) Old 02-02-2020, 01:04 PM
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Thats what ripple is, tiny voltage spikes from the AC waves.
https://lambertsbikes.com/motorcycle...ctifiers-work/
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post #28 of 30 (permalink) Old 02-02-2020, 01:16 PM
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Degreed Electronics Engineer. 40+ years Aviation Electronics design experience.

Spikes and ripple are two very different things.

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post #29 of 30 (permalink) Old 02-02-2020, 01:45 PM
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Depends on your definition of "spike". Saying "I'm an Electronics Engineer" doesn't mean you're right about everything or put an end to discussion.

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post #30 of 30 (permalink) Old 02-02-2020, 03:06 PM
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The blood pressure spike I got from reading this didn't help my heart murmer at all!

I appreciate the info on how to reduce the voltage variance on the R/R output.

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