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Z-11 with a permanent magnet alternator

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bobmeyers(at)meyersfamily
Guest

Posted: Wed Feb 18, 2009 8:47 pm Post subject: Z-11 with a permanent magnet alternator

Hi Bob,



I love this list and how active you are on it.



I am trying to finalize my electrical plan for my Aerovee powered  

Sonex.  I used Z-11 as my starting point but I have one remaining issue.



Since the 20 amp alternator on the Aerovee is a permanent magnet type,  

I do not need to wire up the alt field as I would with a regular  

alternator. The problem I have then is how do I kill the alternator if  

I want to kill the master bus?



Do I need to? I would think so. With the master off and the battery  

disconnected by the contactor, the alternator would still be powering  

the master bus.  Should I put a relay or contactor on the DC output  

from the supplied regulator? I could connect the DC output to the  

battery directly, which would allow the master bus to be killed by the  

battery contactor but the alternator would still be live.



What are your thoughts?



Bob Meyers



Building Sonex 982SX Web Site Index http://meyersfamily.org/Sonex982.html

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nuckolls.bob(at)aeroelect
Guest

Posted: Thu Feb 19, 2009 8:25 am Post subject: Z-11 with a permanent magnet alternator

At 10:43 PM 2/18/2009, you wrote:

 	  Quote: 	
		  

<bobmeyers(at)meyersfamily.org>



Hi Bob,



I love this list and how active you are on it.



I am trying to finalize my electrical plan for my Aerovee powered

Sonex.  I used Z-11 as my starting point but I have one remaining issue.



Since the 20 amp alternator on the Aerovee is a permanent magnet type,

I do not need to wire up the alt field as I would with a regular

alternator. The problem I have then is how do I kill the alternator if

I want to kill the master bus?


	


   If you have a small, PM altenrator, then Z16 is the more appropriate

   architecture.

 	  Quote: 	
		  Do I need to? I would think so. With the master off and the battery

disconnected by the contactor, the alternator would still be powering

the master bus.  Should I put a relay or contactor on the DC output

from the supplied regulator?


	




   Yes, that is a feature of Z-16 and other designs that

   feature alternators with no external control over the

   field.



        Bob . . .



        ----------------------------------------)

        ( . . .  a long habit of not thinking   )

        ( a thing wrong, gives it a superficial )

        ( appearance of being right . . .       )

        (                                       )

        (                  -Thomas Paine 1776-  )

        ----------------------------------------

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bobmeyers(at)meyersfamily
Guest

Posted: Thu Feb 19, 2009 11:23 am Post subject: Z-11 with a permanent magnet alternator

Thanks Bob,



With the word Rotax in the title I never even looked at Z16.  My  

apologies.



Having looked at it and Z17 as well, Z17 shows a voltage regulator  

with three leads - two AC in and one DC out - which looks like the  

configuration of the regulator supplied with my Aerovee. It seems Z16  

is specific to the regulator supplied with the Rotax.



Unless I am missing something, the Z17 configuration is what I will  

look at.



Thanks again.



Bob Meyers



Building Sonex 982SX Web Site Index http://meyersfamily.org/Sonex982.html



On Feb 19, 2009, at 10:23 AM, Robert L. Nuckolls, III wrote:



 	  Quote: 	
		   

 >



 At 10:43 PM 2/18/2009, you wrote:

> 

> >

>

> Hi Bob,

>

> I love this list and how active you are on it.

>

> I am trying to finalize my electrical plan for my Aerovee powered

> Sonex.  I used Z-11 as my starting point but I have one remaining  

> issue.

>

> Since the 20 amp alternator on the Aerovee is a permanent magnet  

> type,

> I do not need to wire up the alt field as I would with a regular

> alternator. The problem I have then is how do I kill the alternator  

> if

> I want to kill the master bus?



  If you have a small, PM altenrator, then Z16 is the more appropriate

  architecture.

> Do I need to? I would think so. With the master off and the battery

> disconnected by the contactor, the alternator would still be powering

> the master bus.  Should I put a relay or contactor on the DC output

> from the supplied regulator?

  Yes, that is a feature of Z-16 and other designs that

  feature alternators with no external control over the

  field.



       Bob . . .



       ----------------------------------------)

       ( . . .  a long habit of not thinking   )

       ( a thing wrong, gives it a superficial )

       ( appearance of being right . . .       )

       (                                       )

       (                  -Thomas Paine 1776-  )

       ----------------------------------------

- 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

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