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I need help, toasted my ESC

Old 12-22-2010, 10:44 PM
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Default I need help, toasted my ESC

Electric Gurus: This is my first attempt at electric flight. I have a Hacker A30-28S brushless outrunner Motor, Hacker brushless (now burnt) X-30 ESC and a ElectriFly 1500 3cell 11.1V battery. I was connecting my electical and pluged my ESC to my battery and smoke started pouring from the ESC. Battery polarities are correct. Obviously there is a mismatch. Parts appear to be new and received as part of a deal on an Addiction.
Any ideas would be appreciated as to what happened and how to prevent this again.
Thanx Don
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Old 12-22-2010, 11:17 PM
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That sounds very strange. Unless you did something exceptionally dumb and plugged two of your motor leads into the battery (Doesn't sound like you did), then I can only assume it was faulty all along. Was your ESC plugged into an RX at the time?

Also, what wires come out of your ESC? A 'normal' style of brushless ESC has three wires for the motor, two for the battery, and then a smaller 3 wire servo connector to go to the RX.

The only other thing I can think of is plugging a battery of too high a voltage in. But that ESC is rated for 3 cell lipos, and that's what you plugged in.

Motors can burn out ESCs by drawing too many amps, but this won't happen unless you've got the throttle up. With the throttle at zero, it doesn't matter what motor you connect, it should NOT damage components.

My best guess is you got a dud.
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Old 12-22-2010, 11:25 PM
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red to red, inspite or connect polarity, some wire them backwards on purpose.
it ok then esc may have just fried...
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Old 12-23-2010, 03:44 AM
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Have you checked the actual polarity of the pack... I've known them to be wired incorrectly.... that is red was negative, black was positive!
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Old 12-23-2010, 04:33 AM
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I agree with what everyone has said, yes check the battery polarity + & - check your motor with a ohm meter to make sure its not shorted out, if everything is ok, you just got a bad ESC, they have been known to fry for no reason at all, get a turnigy 30 amp plush esc, they work great and wont break the bank it all I use, and have never had any problems with them, Hurry, they sell out fast, they are that good. Take care, Chellie


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Old 12-23-2010, 01:06 PM
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Thank you for your help and guidance. I checked my motor and all three legs have .2 ohms of resistance to each other and my battery has the right polarity. And thanx for the advice on Turnigy ESC, wont break the bank compared to the cost of other ESC advertised. I have looked at Hobby King several times and they also have LiPo batteries at a fraction of the cost of ElectriFly etc batteries. Any suggestions as to what brand of LiPo batteries give you the most bang for the buck at Hobby King? One final question, if the ESC can handle 2 to 4 cells at a specific voltage say 11.1v does it matter what the mah of the battery is? For example my Hacker motor says 7.4v or 11.1v 860-1320 LiPo and I hooked it to 1600mah 11.1v battery? The higher the mah the longer the flight time?
Thanx again for your help.
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Old 12-23-2010, 02:22 PM
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Check out HobbyPartz.com They are located in California USA, and shipping is free on many products:

Here is the same ESC:

(Note: Turnigy Plush and Exceed RC Volcano are both re-branded Hobbywing Pentium ESC's. They can all be used interchangeably.)


I strongly recommend buying the programming card (Hobbyking sells it too):


HK Version:


As for batteries, the Rhino series are very popular at Hobbyking and seem to perform well:


Hobbypartz Blue Series lipos aren't bad either:


If you want something a bit better, look at Gens Ace lipos from Hobbypartz:

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Old 12-24-2010, 12:27 AM
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the Turnigy, Zippy and Rhino lipos work great, i have had great luck with them, stay away from the HK brand ESC they are junk IMHO
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