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HomeAircraftHelicopterHelicopter Main Discussion › smokin esc.
06-04-2012 02:07 AM  6 years agoPost 1
em3jefferson

rrNovice

jackson ms.

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what's up guys? quick question. have any of you had your stock align esc
that comes with the trex 550e 3gx just decide it wanted to let the smoke out? what i mean is i was just hovering around a little in normal & idle
1, at the end of battery, i hit throttle hold to do baby auto. after sitting it on the ground, literally the blades were not spinning fast at all it tipped over due to the ground not being level and the blades folded. then i noticed the esc smoking. is it possible that small of a blade hit caused it or the esc was crap?

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06-04-2012 02:25 AM  6 years agoPost 2
dkshema

rrMaster

Cedar Rapids, IA

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My 550e ESC went up in smoke on its twelfth flight. Sitting on the ground, spooling up to take off. Poof, white smoke, fortunately no flames, no other damage. Replaced with a CC ICE 100, works like a charm.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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06-04-2012 01:46 PM  6 years agoPost 3
Big Edge

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Oldsmar, FL USA

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Are you guys running a seperate BEC?

-----------------------------
Don't taze me bro...

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06-04-2012 02:08 PM  6 years agoPost 4
Propwash3D

rrApprentice

ohio great lakes

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those esc
those 70 amp esc are complet junk..i went threw a bunch...i remeber i pluged my stuff in with the blades folded back and poof the magic dragon..

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06-04-2012 02:52 PM  6 years agoPost 5
jschenck

rrProfessor

La Vista, NE.

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friend of mine lost all electronics to a similar incident on his 550. Really starting to think the safe way to handle high voltage setups is to run separate CAP packs from the ESC.

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06-04-2012 04:01 PM  6 years agoPost 6
Big Edge

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Oldsmar, FL USA

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Now you got me thinking about replacing the ESC on my 550 V2.

The same ESC has been working great on my 500.. Maybe not up to the task on the 550.

-----------------------------
Don't taze me bro...

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06-04-2012 04:08 PM  6 years agoPost 7
dkshema

rrMaster

Cedar Rapids, IA

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I'm not using an external regulator, the ICE 100 has been working just fine for the past couple of seasons with no issue as is.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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06-04-2012 04:40 PM  6 years agoPost 8
rudyy

rrElite Veteran

E. Amherst, NY

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I am using the stock Align ESC for over hundred flights on my 550E, and knock on wood.. no issue. I am using a separate LiFe pack for powering up the electronics though.

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06-04-2012 05:06 PM  6 years agoPost 9
Big Edge

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Oldsmar, FL USA

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I'm using a seperate BEC but not powered by a second battery pack.
(Hercules Super Mini Battery Eliminator Circuit G2).. I assume this would reduce the load on the stock ESC.? Less heat as well?

-----------------------------
Don't taze me bro...

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06-05-2012 01:46 AM  6 years agoPost 10
dkshema

rrMaster

Cedar Rapids, IA

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I assume this would reduce the load on the stock ESC.? Less heat as well?
Minimal gains at best.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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06-05-2012 02:09 AM  6 years agoPost 11
Big Edge

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Oldsmar, FL USA

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Appreciate the input dkshema..

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Don't taze me bro...

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06-05-2012 02:38 AM  6 years agoPost 12
Dr.Ben

rrMaster

Richmond, VA, USA

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The best way to ease the burden on ANY ESC is to gear correctly. Heavy and constantly variable flight loads with tall gearing and excessive headroom in governor applications are very hard on FETs and cause them to run hot. The lower the throttle operating percentage, the more the FETs have to turn on and off. The higher the flight loads on the motor, the greater the current spikes as the FETs turn on and off. The combination of the two, high cycle rates and high current spikes, is not the recipe for controller longevity.

Gear the system to run in the 85%+ throttle range with average peak currents within the product's rating, and life is generally pretty good these days.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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06-05-2012 02:48 AM  6 years agoPost 13
dkshema

rrMaster

Cedar Rapids, IA

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Dr. Ben is correct. The "hardest working" part of the ESC is the speed control portion, not the regulator, as in the case of the Align BL-70, the regulator is a fairly efficient switching regulator. As it IS efficient, little energy is lost in the power conversion from the high voltage pack levels down to the voltage level needed to run your electronics. Even at that, the load on the regulator is not constant, and rarely at or near 100% of its output, so it doesn't really get hot. The average current and power through the regulator is minimal when compared to that being handled by the motor control stage.

The smaller ESCs with their 2-3 amp linear regulators are a bit of a different story, as the energy loss in the regulator section can cause the ESC to run fairly hot. That's why these are generally limited to a 3S LiPo input.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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06-05-2012 04:57 AM  6 years agoPost 14
jschenck

rrProfessor

La Vista, NE.

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many of the failures I've read about and heard about are when first spooling up, not after a stick banging flight. That would lead me to believe it isn't necessarily the entire ESC overheating but specifically the capacitors dropping below their rated buffering. This causes feedback/resonance between the battery and the ESC causing the FET's to blow. I don't know much about electronics but this makes sense to me. The capacitors are failing because they don't last long when they get hot. Seems to me the way to solve this is to run the capacitors away from the ESC so they don't get hot/cooked. Would be ideal to be able to easily measure their capacitance/buffering capability and just replace them when they get below a certain limit. does this sound right?

Also this seems to be much more of an issue on 12S setups. I don't hear about lower voltage setups smoking nearly as much.

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06-05-2012 01:04 PM  6 years agoPost 15
Big Edge

rrApprentice

Oldsmar, FL USA

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Some good information there..
I've been running 90 - 100% throttle on Align ESCs in my 500 ESP and 550 V2 and have not had an issue.
While researching the 550 V2 I found that most are running a seperate BEC so thats what I have done as well.
(Hercules Super Mini Battery Eliminator Circuit G2)

-----------------------------
Don't taze me bro...

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06-05-2012 02:38 PM  6 years agoPost 16
jschenck

rrProfessor

La Vista, NE.

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I'm putting the 11T pinion on my 500EFL so I can run a 100% throttle without the crazy 3200 headspeed, same reason. Easier on the ESC and battery.

With the 12S setups do you think part of the issue is the long wires required to hook up two 6S packs? On some setups there is nearly a foot of wire between the ESC and the rear pack.

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06-05-2012 06:34 PM  6 years agoPost 17
Stephen Born

rrElite Veteran

USA

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With the 12S setups do you think part of the issue is the long wires required to hook up two 6S packs? On some setups there is nearly a foot of wire between the ESC and the rear pack.
Battery lead length should not extend 12 inches TOTAL.

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