nuckolls.bob(at)aeroelect
Guest
|
 Posted: Mon Oct 27, 2014 3:44 pm Post subject: Brown-out resets at engine start |
 |
|
At 10:43 2014-10-27, you wrote:
| Quote: |
Yes, potentially if it is wired correctly.
The point I was trying to subtly make was that we don't yet have a Z
figure that incorporates brownout protection (that I am aware of, please
correct me if this is incorrect), and many people keep asking about this.
|
It's been discussed and several options offered for
years.
(1) Z-14 where starting is accomplished with one battery . . .
(2) Any Z-figure with an aux battery auto-switched
like the original ABMM concept except the battery services
the e-bus as opposed to ignition systems or . . .
(3) A simple form of auto-switching is illustrated in Z-8
offering an aux battery auto-switched through a relay that
disconnects the battery from the main bus while the starter
is engaged . . . in this configuration, the e-bus alternate
feed switch is closed during engine start. Add one relay,
fuse holder and battery sized to task to any system with
an e-bus.
There are probably a half dozen or more other solutions
that speak to design goals for brown-out protection that
are simply modification to the existing Z-figures. Mods
with no impact on design goals that brought the Z-figure
into existence in the first place.
My current thinking says the dragon to be tamed is not
how to switch the battery into service . . . but battery
selection for minimizing volume, weight and cost of
ownership. As I mentioned earlier, sand-castles built
in the lithium sandbox over the past few weeks have
planted seeds of some ideas.
The battery needs to be capable of say 5A of delivery
at 10+ volts for a period of not more than 0.5
seconds about 50 times a year. It's never depended on
for standby power, hence never expected to be discharged.
It also needs to demonstrate a long, "shelf life"
as a device that spends most of its time open circuit,
50 hours a year attached to a charger, and never asked
to deliver more than 50 Joules per discharge/charge
cycle.
In this case, the elegant solution is driven more
strongly by product selection than by architecture.
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 |
|
|
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
