Matronics Email Lists Forum Index Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
 
 Get Email Distribution Too!Get Email Distribution Too!    FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Sequence for bringing alternators on line.

 
Post new topic   Reply to topic    Matronics Email Lists Forum Index -> AeroElectric-List
View previous topic :: View next topic  
Author Message
nuckolls.bob(at)aeroelect
Guest





PostPosted: Wed Jun 13, 2018 7:55 am    Post subject: Sequence for bringing alternators on line. Reply with quote

At 10:09 AM 6/13/2018, you wrote:
Quote:
Bob

Are your assertions below, about the SD-8, also valid for the SD-20 (now BC-410H)?

Thanks
Carlos

Any alternator . . .

I've been working with engine driven power sources on
aircraft and ground based vehicles for a long time. I've
spent hours in the lab with various alternators and generators
on test stands exploring system performance of the
various components with some pretty illuminating
test equipment.

Not once have I observed any adverse behaviors of
these machines when turning on or off EXCEPT for
the classic, uniquely AUTOMOTIVE definition of a
LOAD DUMP. This is a carefully orchestrated
condition where the system loads are low to zero.
The alternator is working hard to RECHARGE a
DEPLETED battery. The BATTERY becomes disconnected
from the bus.

This is the electronic equivalent of playing tug-of-war
wherein both sides have their heels dug in and are
straining on the rope . . . then you cut the rope
. . . EVERYBODY hits the ground.

I could duplicate this condition in a Bonanza or
Baron where the alternator(s) and battery are
on separate switches. Discharge the battery,
crank with ground power, turn on the alternator(s)
and then turn the battery off. Sho' 'nuf . . . you're
going to get a big bump in alternator output
due to a predictable delay in voltage regulator response
to a sudden drop in load wherein the BATTERY's
mitigating influence on such events is not present.

Now, how often and under what circumstances would
such an event happen in YOUR airplane?




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
Back to top
Display posts from previous:   
Post new topic   Reply to topic    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


Powered by phpBB © 2001, 2005 phpBB Group