Brownout or esc issue?
08-29-2011 | 12:11 AM
#1
Thread Starter
Tech Adept
Joined: Aug 2011
Posts: 154
From: Sweden
Brownout or esc issue?
I run a 1/10 shortcourse with a hobbyking 120a 1/5-1/8 esc (bought before I knew very much about anything). It has a limit of 7,5T offroad motors according to it's manual. With this, i run the Castle 1410.
The issue is, that about halvway into a battery, I frequently get "throttle brownout" meaning that the car totally loses power, and stands there for a good 2-4 seconds(sometimes less). During this time I can control the steering servo.
The glitch does seem to start after the truck takes a hit, for example after landing a jump, and then continues to return on any stretch of the track.
When i run on a flat surface i can get to lvc without any issues. But when i mix in some jumping, the glitch comes a while into a battery.
I have a 3300uf voltage protector connected to the receiver.
The fact that i can control the wheels during the glitch leads me to believe that it is not a radio brownout, and that the problem is more inclined to come from the esc.
Any ideas?
The issue is, that about halvway into a battery, I frequently get "throttle brownout" meaning that the car totally loses power, and stands there for a good 2-4 seconds(sometimes less). During this time I can control the steering servo.
The glitch does seem to start after the truck takes a hit, for example after landing a jump, and then continues to return on any stretch of the track.
When i run on a flat surface i can get to lvc without any issues. But when i mix in some jumping, the glitch comes a while into a battery.
I have a 3300uf voltage protector connected to the receiver.
The fact that i can control the wheels during the glitch leads me to believe that it is not a radio brownout, and that the problem is more inclined to come from the esc.
Any ideas?
08-29-2011 | 01:24 AM
#2
Yea - doesnt sound like a servo/BEC issue. You can usually recreate those on the bench.
I'm not too smart on those ESC's, but if it has a limit of 7.5T (that being the lower limit), I think the castle falls below that? I'm not sure what its rated in turns, but @ 3800kv, I'd GUESS....5.5T? Not sure with it being a 4 pole, how that figures in. Its a neu style I believe, so I dont think it follows the turns conventional motors are given...
My money would be on the ESC. How are temps when you come off?
I'm not too smart on those ESC's, but if it has a limit of 7.5T (that being the lower limit), I think the castle falls below that? I'm not sure what its rated in turns, but @ 3800kv, I'd GUESS....5.5T? Not sure with it being a 4 pole, how that figures in. Its a neu style I believe, so I dont think it follows the turns conventional motors are given...
My money would be on the ESC. How are temps when you come off?
01-07-2012 | 07:41 PM
#5
Tech Regular
Joined: Sep 2009
Posts: 307
I run a 1/10 shortcourse with a hobbyking 120a 1/5-1/8 esc (bought before I knew very much about anything). It has a limit of 7,5T offroad motors according to it's manual. With this, i run the Castle 1410.
The issue is, that about halvway into a battery, I frequently get "throttle brownout" meaning that the car totally loses power, and stands there for a good 2-4 seconds(sometimes less). During this time I can control the steering servo.
The glitch does seem to start after the truck takes a hit, for example after landing a jump, and then continues to return on any stretch of the track.
When i run on a flat surface i can get to lvc without any issues. But when i mix in some jumping, the glitch comes a while into a battery.
I have a 3300uf voltage protector connected to the receiver.
The fact that i can control the wheels during the glitch leads me to believe that it is not a radio brownout, and that the problem is more inclined to come from the esc.
Any ideas?
The issue is, that about halvway into a battery, I frequently get "throttle brownout" meaning that the car totally loses power, and stands there for a good 2-4 seconds(sometimes less). During this time I can control the steering servo.
The glitch does seem to start after the truck takes a hit, for example after landing a jump, and then continues to return on any stretch of the track.
When i run on a flat surface i can get to lvc without any issues. But when i mix in some jumping, the glitch comes a while into a battery.
I have a 3300uf voltage protector connected to the receiver.
The fact that i can control the wheels during the glitch leads me to believe that it is not a radio brownout, and that the problem is more inclined to come from the esc.
Any ideas?
Equipment = Tekin RS Pro, SANWA SRG-BLS, 451R Rx, 17.5T Ballistic motor.
Throttle Brown-out lasts only a couple of seconds and occurs mostly after a roll-over. Added a cap, ensured that all LVC's are off, changed motor/sensor wire....still happened.
I now changed ESC. Hoping that this will work.
Are you certain that cleaning the innards of the ESC was the solution?
Thanks!!
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