Matronics Email Lists :: View topic

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

What Capacitor Size?

Matronics Email Lists Forum Index -> AeroElectric-List

View previous topic :: View next topic

Author Message

jnmeade

Joined: 27 Sep 2012
Posts: 12

Posted: Thu Jan 10, 2019 7:05 am Post subject: What Capacitor Size?

I am installing an auxiliary 40A external alternator (with internal  

voltage regulator) on a Rotax 912ULS engine.  How do I determine the right  

specs on the capacitor?



The Rotax wiring diagram calls for a capacitor but there is no schematic  

or other source of information on the capacitor specs that I can find.



(This question is not about the existing 22,000 uf capacitor on the Rotax  

internal permanent magnet 18A generator.)



How do I determine the desired characteristics of a capacitor in this kind  

of application?



Thanks

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

kenryan

Joined: 20 Oct 2009
Posts: 426

Posted: Thu Jan 10, 2019 7:27 am Post subject: What Capacitor Size?

You might want to ask the folks at rotax-owner.com forum. I think I read there that the capacitor for the external alternator is a mistake and no capacitor is required.



Sent from my Android. Sorry Steve.



On Thu, Jan 10, 2019, 10:21 James Meade <jnmeade(at)southslope.net (jnmeade(at)southslope.net) wrote:



 	  Quote: 	
		  --> AeroElectric-List message posted by: "James Meade" <jnmeade(at)southslope.net (jnmeade(at)southslope.net)>

 

 I am installing an auxiliary 40A external alternator (with internal  

 voltage regulator) on a Rotax 912ULS engine.  How do I determine the right  

 specs on the capacitor?

 

 The Rotax wiring diagram calls for a capacitor but there is no schematic  

 or other source of information on the capacitor specs that I can find.

 

 (This question is not about the existing 22,000 uf capacitor on the Rotax  

 internal permanent magnet 18A generator.)

 

 How do I determine the desired characteristics of a capacitor in this kind  

 of application?

 

 Thanks

 ===========

 br> fts!)

 r> > e.com" rel="noreferrer noreferrer" target="_blank">www.mypilotstore.com

 rel="noreferrer noreferrer" target="_blank">http://www.matronics.com/contribution

           -Matt Dralle, List Admin.

 ===========

  -

 Electric-List" rel="noreferrer noreferrer" target="_blank">http://www.matronics.com/Navigator?AeroElectric-List

 ===========

  FORUMS -

 eferrer noreferrer" target="_blank">http://forums.matronics.com

 ===========

 WIKI -

 errer noreferrer" target="_blank">http://wiki.matronics.com

 ===========

 b Site -

           -Matt Dralle, List Admin.

 rel="noreferrer noreferrer" target="_blank">http://www.matronics.com/contribution

 ===========

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

user9253

Joined: 28 Mar 2008
Posts: 1922
Location: Riley TWP Michigan

Posted: Thu Jan 10, 2019 8:08 am Post subject: Re: What Capacitor Size?

Any size capacitor will not do much good.

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

_________________
Joe Gores

nuckolls.bob(at)aeroelect
Guest

Posted: Thu Jan 10, 2019 8:40 am Post subject: What Capacitor Size?

At 08:57 AM 1/10/2019, you wrote:

  	  Quote: 	
		  --> AeroElectric-List message posted by: "James Meade" <jnmeade(at)southslope.net>



 I am installing an auxiliary 40A external alternator (with internal  

 voltage regulator) on a Rotax 912ULS engine.  How do I determine the right  

 specs on the capacitor?



 The Rotax wiring diagram calls for a capacitor but there is no schematic  

 or other source of information on the capacitor specs that I can find.



 (This question is not about the existing 22,000 uf capacitor on the Rotax  

 internal permanent magnet 18A generator.)



 How do I determine the desired characteristics of a capacitor in this kind  

 of application? 	


   I have discovered with bench testing that

   the legacy capacitor installed on the

   majority of alternators serves no

   useful purpose. You can leave it

   out if you wish.



 

 

   Bob . . .

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

Display posts from previous:

	Matronics Email Lists Forum Index -> AeroElectric-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum