Burning ESC- Help Please
#1

I burned up 2 ESC's (one was still on the bench). Here is the set up and I am told this set up is used by some guys.
DX6i
6200 receiver
(two) 2200mah 3cell 20C - hooked together in series
Turnigy 35-30-1100kv
Turnigy Plush 40A ESC
The ESC failed as soon as the throttle was advanced( only about 25-50%). I have checked to ensure the "series " is wired correctly.
Any one care to point me in the right direction.?


DX6i
6200 receiver
(two) 2200mah 3cell 20C - hooked together in series
Turnigy 35-30-1100kv
Turnigy Plush 40A ESC
The ESC failed as soon as the throttle was advanced( only about 25-50%). I have checked to ensure the "series " is wired correctly.
Any one care to point me in the right direction.?



#3
Member
Join Date: Jun 2008
Posts: 161

I don't think a 40Amp ESC can handle 2.. 3S of any kind.. Drop 1 of them..
With that motor running an 8x3 combat prop, that should pull like 16-18A. So the 40A should be ok. I used a Volcano 40A Opto in mine with a seperate BEC. You may want to post to the RC groups combat section if not the RCCA forum. Lee Liddle monitors both and could help. I will have the same setup in my eFalcon, but I"ve yet to even start my build. Got the kit last night.
I ran a Volcano 40A w/ Opto and switching BEC (switching BEC hooked up to lower 3S only).
Is this the ESC you have?
http://www.hobbycity.com/hobbyking/s...idProduct=2165
I ask because, the specs show Linear but The 40A Plush is supposed to have a switching BEC (Yours has the donut shaped filter at the end of the servo connection?). The instructions that came with it says 40A is switching.
One way to tell if it's linear is when you hook it up and wiggle the servos around for a while, does the ESC get hot (not running motor), If so, it's Linear, if not, it's probably switching.
If I were you I'd get a 3A hobbywing or turnigy switching BEC and try that. For anything over 3S, I don't like to use the ESC's BEC, even if it says linear.
#4

Yes that is the ESC that burned up. I am going to use a 60Amp and try an 80 A as well. I am trying to get ready for the Street ,MD contest. I saw that you signed up.
What RPM's are you getting?
Did you have 17,500 when you flew at Laurel?
Thanks for your help
What RPM's are you getting?
Did you have 17,500 when you flew at Laurel?
Thanks for your help
#5

35-30-1100kv turnigy =345watts..........you said your running 2 3cell packs in series
that motor can't handle 6 cells
.........
Capitan ,I'm given her all she's got ....she burning up her dilithium esc...err..crystals
.
35-30-1100 is 3 cell rated,did you mean your running them in parallel?


Capitan ,I'm given her all she's got ....she burning up her dilithium esc...err..crystals

35-30-1100 is 3 cell rated,did you mean your running them in parallel?
#6
Member
Join Date: Jun 2008
Posts: 161

He's running it in series. He has to get at least 17,500 RPM. You don't always have to follow motor cell count ratings. Wattage rating is the key. That 8x3 prop does not load the motor more than about 16-18A at 17,500RPM. This motor is already being used by SSC pilots down in Tx on 6S. I used a Hobbypartz Monsterpower 15 on 6S in the last contest (3 of us did). They blew ESC's only on 2 of the 5 prop impact mid-airs we had.
Now, he could have a faulty motor. I may end up eating my own words in a the next day cause I'm using the same motor on 6S for my new combat setup also.
Now, he could have a faulty motor. I may end up eating my own words in a the next day cause I'm using the same motor on 6S for my new combat setup also.
#9
#10

thanks James, i guess it's still pretty fast fun even tho called slow.....the only combat i watched was very funny and super fast. 5 delta type wing screaming around the sky trying to hit each other ,impacts would damage as expected....but the winner was the last wing flying which meant running the lipos very low,some just drop out due to battery.
i will say the action was way to fast for me to consider as the spectators must be considered as your chasing planes in the air...
i will say the action was way to fast for me to consider as the spectators must be considered as your chasing planes in the air...

#11

Is that a Texas Flugwerks Kit? I've never seen an engine mount stick out so far forward..........or is the wing just sitting back unattached?
If you are having trouble getting it to balance gimme a shout back.......I have a couple of ideas.
Last edited by Dane McGee; 06-13-2010 at 04:40 PM.
#12

If the same motor keeps burning up esc's, then I would check the motor very carefully for shorts or opens or a bad connection/connector in one of the windings.
If one phase has a short or open or even just a slightly higher resistance compared to the other phases it will cause the esc to get super hot at a minimum and can burn them up in seconds.
It may also be binding or have a magnet thats slipped etc or one phase may be wound incorrectly from the factory.
With the next esc, I would test it on a known good motor first before trying to run this motor again. You could also risk a known good esc to see if it will run this motor - its a risk though.
If one phase has a short or open or even just a slightly higher resistance compared to the other phases it will cause the esc to get super hot at a minimum and can burn them up in seconds.
It may also be binding or have a magnet thats slipped etc or one phase may be wound incorrectly from the factory.
With the next esc, I would test it on a known good motor first before trying to run this motor again. You could also risk a known good esc to see if it will run this motor - its a risk though.
#15

I burned up 2 ESC's (one was still on the bench). Here is the set up and I am told this set up is used by some guys.
DX6i
6200 receiver
(two) 2200mah 3cell 20C - hooked together in series
Turnigy 35-30-1100kv
Turnigy Plush 40A ESC
The ESC failed as soon as the throttle was advanced( only about 25-50%). I have checked to ensure the "series " is wired correctly.
Any one care to point me in the right direction.?



DX6i
6200 receiver
(two) 2200mah 3cell 20C - hooked together in series
Turnigy 35-30-1100kv
Turnigy Plush 40A ESC
The ESC failed as soon as the throttle was advanced( only about 25-50%). I have checked to ensure the "series " is wired correctly.
Any one care to point me in the right direction.?



Also, what failed, the power circuits that drive the motor? or the 5 volt regulator that drives your receiver and servos?
#17

.........Hobby King SS brand esc 40-50 amp $11.00, ............then Plush 40 esc for $21.00 or so and the Turnigy Sentry for about the same price.
Is that a Texas Flugwerks Kit? I've never seen an engine mount stick out so far forward..........or is the wing just sitting back unattached?
If you are having trouble getting it to balance gimme a shout back.......I have a couple of ideas.
Is that a Texas Flugwerks Kit? I've never seen an engine mount stick out so far forward..........or is the wing just sitting back unattached?
If you are having trouble getting it to balance gimme a shout back.......I have a couple of ideas.
Both wings fly great, with a slight advantage to the Texas FW wing. Balance is OK. Flying one with no elevator which is a bit tricky and will snap if I give it hard elevator.
Bill

PS: This plane has a Texas FW wing.
Last edited by shepard62; 06-15-2010 at 12:20 AM.
#18