I have done this power layout to ensure power failsafe if something goes wrong.
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I have done this power layout to ensure power failsafe if something goes wrong.
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What APM power module are you going to use?
And what BatShare are you going to use, i see there is 3 types.
This will be my layout
I have read the manual, but someones picture will give you that light bulb moment.
This is the link to the manufacturer of the BatShare.
https://www.smart-fly.com/Products/BatShare/batshare.htm
In it there is a manual with clear diagrams of how to hook it up. I am going to use one in my APM setup. If someone trusts an 10K plane to it that is good enough for my $200 Penguin.
@Eagle its a pleasure I was just tired of using one power source and stressing my arse of that something goes wrong.
@Peter I am finding it hard to picture what your are saying in my head because the batshar pic have posted have 2 inputs and 2 outputs, can I ask you a massive favour and mabey draw it in paint like I did, I have read a bit on this batshare and I think it is the way to go like you say and I would just like to picture a architecture.
Kind regards
Christiaan
To prevent unwanted current flows due to voltage mismatch, just put a schottky diode between each power source and the APM. A small voltage loss will result, but at this current the heat will barely warm a bees arse. This is typically how redundant charging systems are configured in boats and RV's, albeit in the other direction.
What about the 20A ESC that are supplied by 3DRobotics? All the load 760ma (I measured on my APM1.4) going through one ESC/BEC seemed like a load and fused the ground trace.
I've thought about creating another power lead from the power distribution board to feed the APM. I agree if the BEC in the ESC shorts it will take the second BEC with it. But when your Toast your Toast. If the BEC is under less load I think that would be better.
Hi Christiaan,
If all BECs are linear and I presume 5 volts you might get away with this, I often paralleled linear BECs from identical ESCs without ill effect.
However, if any BEC is a switcher it will not work, switching BECs definitely do not like being paralleled.
They actively sample their outputs and if they see another power supply they compensate inappropriately.
However, if one BEC fails in your system it can either go to a short or an open. If it goes to an open your other BECs can take up the slack. If it goes to a short it will simply take out the other BECs too and worse since you are using the APM as the combiner it might take it out too.
Something like the above Bat Share device is a generally better solution because it will deal with either failure mode.
I am still in the designing phase and the I want the perfect power system. I used a one battery system to power everything and lost a plane that way because of a faulty solder.
This is interesting, care to share a little bit more about your setup (wiring schematics an configuration).
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