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Question on Z16 in aeroelectric connection

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donaldjsmith(at)ukonline.
Guest

Posted: Tue Oct 23, 2007 2:12 pm Post subject: Question on Z16 in aeroelectric connection

Can anyone explain how the alternator output is stopped or disconnected when

the Alternator OV Disconnect Relay breaks the Voltage Regulator Yel wire?  I

do not undersatnd how this works when C B and R are still connected.  An

explanation as to how this regulator works would be useful.



Regards



Donald J Smith

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mprather(at)spro.net
Guest

Posted: Tue Oct 23, 2007 3:29 pm Post subject: Question on Z16 in aeroelectric connection

Disconnecting the alternator doesn't stop it's output, sort of.  The

primary goal of the relay is to keep a misbehaving alternator from

damaging other things that are connected to the system, like avionics, and

the battery.



Disconnecting the alternator from the bus will mostly drive its output

current to zero (and hence power/wattage), though the output voltage may

go up quite a bit - 80v (unregulated/failed regulator) - on a wound field

unit I think, or become quite unstable/noisy (who cares) - it's not

connected to anything.

Regards,



Matt-



 	  Quote: 	
		   

 <donaldjsmith(at)ukonline.co.uk>



 Can anyone explain how the alternator output is stopped or disconnected

 when

 the Alternator OV Disconnect Relay breaks the Voltage Regulator Yel wire?

 I

 do not undersatnd how this works when C B and R are still connected.  An

 explanation as to how this regulator works would be useful.



 Regards



 Donald J Smith

- 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:

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donaldjsmith(at)ukonline.
Guest

Posted: Wed Oct 24, 2007 11:56 am Post subject: Question on Z16 in aeroelectric connection

The rotax alternator is a permanent magnet type and it has two outputs (two

yellows).  I'm guessing but these might be different phases. So

disconnecting one yellow line might still allow output to the regulator.



regards



Donald



---

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