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Old 11-16-2013, 05:04 AM   #601
bikyto
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Quote:
Originally Posted by XFanMan View Post
Surely you're talking Fahrenheit not Centigrade, unless you can boil soup in your glovebox?
correct, this euro keyboard got me all confused. Thanks for the catch
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Old 11-16-2013, 05:30 AM   #602
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Originally Posted by bikyto View Post
correct, this euro keyboard got me all confused. Thanks for the catch
No problem, I just thought I might have to start carrying a fire extinguisher on my SDR
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Old 11-16-2013, 05:32 AM   #603
bikyto
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Originally Posted by XFanMan View Post
No problem, I just thought I might have to start carrying a fire extinguisher on my SDR
Much easier on my laptop!! and I do carry a fire extinguisher at all times! (I won't say where)

Back to the usual program... Thanks again
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Old 11-16-2013, 06:06 AM   #604
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I spend a lot of time in the desert southwest. I am expecting ambient temps near a motorcycle to be around 50C on a normal summer day. Motobrain will need to be able to handle that without issue. Your 33C (90F) glove box therefore won't be an issue. That is how hot my office is in the summertime here in Atlanta.
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Old 11-16-2013, 06:11 AM   #605
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yes similar in CA. except in the desert when I am stuck and the bike is overheating, I just need to be able to rely on all the electrical output available (mainly for the winch). And it will be on the backside of the "glove compartment" so it will be warmer/hotter there.

I've measured the inside of the airbox at up to 138f. fwiw.

I look forward to your upgraded model. Thanks again.
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Old 11-16-2013, 06:45 AM   #606
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Originally Posted by bikyto View Post
yes similar in CA. except in the desert when I am stuck and the bike is overheating, I just need to be able to rely on all the electrical output available (mainly for the winch). And it will be on the backside of the "glove compartment" so it will be warmer/hotter there.

I've measured the inside of the airbox at up to 138f. fwiw.

I look forward to your upgraded model. Thanks again.
138F is not quite 60C. That is warm, not hot. I do not expect significant temperature related issues with Motobrain if you can hold it in your bare hand. When it gets too hot to touch is when I expect to see issues. I have not yet characterized how severe they will be yet, but I will generate a datasheet with all the relevant tables once I've collected the data.
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Old 11-17-2013, 10:39 AM   #607
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Thank you for the quick reply
the "glove box" on the 990s is above the air box which is above the engine
I currently have an fz1 which is already wired hence impractical for re wiring and in the field access
thanks again though
Why not mount the Motobrain in the vicinity of the ECU. High, fairly protected and in the ambient air stream.
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Old 11-17-2013, 10:39 AM   #608
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Originally Posted by DirtJack View Post
Why not mount the Motobrain in the vicinity of the ECU. High, fairly protected and in the ambient air stream.
That is exactly the type of place I would suggest.
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Old 11-17-2013, 11:04 AM   #609
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Why not mount the Motobrain in the vicinity of the ECU. High, fairly protected and in the ambient air stream.
Because on the 990, to get to the headlight you need to dissemble half of the bike. Especially with safari tanks. Not practical at all.
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Old 11-17-2013, 12:04 PM   #610
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Because on the 990, to get to the headlight you need to dissemble half of the bike. Especially with safari tanks. Not practical at all.
May I suggest crash bar studs and lower tank thru bolts to make re-assembly a snap. Responded too quickly -- didn't see the Safari tanks.
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DirtJack screwed with this post 11-17-2013 at 12:06 PM Reason: Too quick a response
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Old 11-17-2013, 12:39 PM   #611
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Originally Posted by DirtJack View Post
May I suggest crash bar studs and lower tank thru bolts to make re-assembly a snap. Responded too quickly -- didn't see the Safari tanks.
No worries. I've modified so many things on the bike for the various rtw trips and else that I don't know what part of the bike that could possibly be changed at this point. Thanks for the ideas though, they were implemented years ago.
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Old 11-19-2013, 02:39 PM   #612
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just watched the youtube video, very nice looking forward to a release date
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Old 12-02-2013, 05:30 PM   #613
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New kit arrived and testing continues

Greetings friends. More kit arrived courtesy of eBay. Today we introduced the lab to a 2500W DC power supply which was surplus from our friends at General Motors. This device finally allows me to push the Motobrain all the way to 125A. I only intend to push the Motobrain to 100A so this is the last laboratory power supply I will need for this project. This is a great supplement to that DC load which we surplussed from NASA a few weeks back. Between the two we can now source and sink all the power we require of Motobrain. This afternoon I ran Motobrain for an hour pulling ≈80A through it. Nothing caught on fire which is a bonus! I found that Motobrain's temperature rise accelerates as the current increases linearly. I expected this and I intend to further characterize it but the temps I saw today are not problematic yet. I have a new Power PCB with screw down terminals in fabrication now and I expect they will provide greater thermal mass and better heat dissipation. There is also room on the new board for a heat sink if deemed necessary.

After about 20 minutes at 80A the temperature settled in at about 80C. The hottest things I found on the Motobrain were the power MOSFETs as expected. I believe the correlation between current in Amperes and temperature in degrees Celsius is purely coincidental.

IMG_20131202_160604_669[1]


The new Power Supply and DC Load.


32DE424A-C65A-4C98-912C-719C616FB176[1]


App screenshot showing us pulling 83A


FLIR0025[1]


The hottest thing I could find was a MOSFET. Here is was 76.6C though it got up to about 78C eventually.


FLIR0021[1]


This is the of the whole lab bench in infrared. The Motobrain is bottom left. The current carrying wires are the glowing spaghetti you see all over.


 
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Old 12-06-2013, 07:55 AM   #614
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Great thermal shots of the unit in action.
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Old 12-22-2013, 09:47 AM   #615
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Thumb High Tech Fuse Block

I just stumbled across this thread and am extremely impressed with what you've done. May I suggest that, in time, you might want to offer a similar device with greater number of outputs and current capacity for the motorhome crowd? Something like this may prove to be extremely popular with those folks as power distribution is quite a PITA done the traditional way. Fantastic work, keep it up!
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