Thud wrote:Here is a link that takes us through the discovery & trouble shooting of these small controller "cutting out" issuses:
http://endless-sphere.com/forums/viewto ... =2&t=16910
I have yet to form an opinion on the reason this circut is so touchy on these models, It is a great saftey feature if that was the intent.
I know that these guys were haveing the same issues also:
http://endless-sphere.com/forums/viewto ... =2&t=12616
Once I modify the shunt (solderd 1/2 shut) to lower the resitance, (thus matching the ratings of a 12 FET controller) I am wondering if the values will be askew enough to make havok on the LVC programed settings.
Thud wrote:Thanks for the input gwhy,
I don't know why I assumed the #s in parameter designer reflected actual ampers draw....but that makes more sence given the way the Block time settings function.(I am going to re-read a couple threads now)
Upgraded the FETs to irfb4110's.
caps low ESR 100v capable.....
The plan is to finish the modified box to house it in & get some real live testing done with the bike this weekend.
Need to be carfull, so I can race it next Sat. & see how it does against the gassers.
I will be starting wth some conservitive settings & only push it to where I feel its competitive. I hope that happens before it blows up.(I have Lyen's 72v 18 fet on the way for back up )
I am using an turnigy 80/85-170 & hope it matches the perfomance of your scooter project.
Are you using your 12fet on the scooter? (please tell me it was the 6 fet model )
Thanks again. T
mwkeefer wrote:Another point... when using infineons (only 846 so far, sorry will check the 116 soon) to drive RC motors which I have adapted with Halls... setting phase current to approx 1.25 X that of primary current yeilded the fastest no-load RPMs (combined with 115% speed setting)... 1:1 acheived the same no-load RPM but 1.25 was as far as I could tweak the difference before the noload top RPM went down...
Thud wrote:Thanks for the input Guys,
I have a roll of kapton inbound.
(you have to admit, the monster heatsink look industrial)
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