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RC Equipments => Electric Power => Topic started by: Hellyflyer on December 18, 2009, 10:52:08 PM

Title: How to check an ESC burnt or alive
Post by: Hellyflyer on December 18, 2009, 10:52:08 PM
Hi,

I want to know How we can check if an ESC is burnt or alive without putting it on the motor or the Heli itself. As I have a 25 amp Esky ESC which is does not work when I read forums they say that normally it catches fire n burns but nothing like that happend to this one but it just stopped working currently I am using another ESC but I want to know how can I check if this one is okay or not and if its not okay then is there a way to fix it? ???

Thanks
HellyFlyer
Title: Re: How to check an ESC burnt or alive
Post by: ankur on December 18, 2009, 10:56:55 PM
read this
http://www.rcuniverse.com/forum/m_9337483/anchors_9338209/mpage_1/key_/anchor/tm.htm#9338209
Title: Re: How to check an ESC burnt or alive
Post by: Hellyflyer on December 30, 2009, 09:30:44 PM
Tried everything the forum instructed now I guess the only way is to peal the heat sink and look inside for burnt stuff :-[
Title: Re: How to check an ESC burnt or alive
Post by: Rao on December 31, 2009, 01:23:51 AM
If the output MOSFETs are short then the circuit would burn but if the MOSFETs are open then there would not be any burning of the circuit but the ESC would not work.
Title: Re: How to check an ESC burnt or alive
Post by: rcforall on December 31, 2009, 08:07:09 AM
Quote from: Hellyflyer on December 30, 2009, 09:30:44 PM
Tried everything the forum instructed now I guess the only way is to peal the heat sink and look inside for burnt stuff :-[

Best  is to open the heat shrink and inspect if anything is burnt inside. Normally  you know it immly when you see the IC inside.

Sai
Title: Re: How to check an ESC burnt or alive
Post by: Hellyflyer on January 01, 2010, 01:16:47 PM
Hi All,

Below the heatsink I see 8 small black 2 leged mosphet's (i guess) and one IC on the other side. One of the mosphets is burnt and has also burnt the dual layer PCB. So I don't think its repairable is it?

Thanks
Amit
Title: Re: How to check an ESC burnt or alive
Post by: anwar on January 01, 2010, 02:57:42 PM
Typically, it is not worth risking the heli with improvisations on such a critical component (as all power including receiver power flows through it).
Title: Re: How to check an ESC burnt or alive
Post by: FlyJoe on January 01, 2010, 08:04:15 PM
I agree with Anwar, NOT worth it. A friend lost his plane to a "repair" like this.
If it died then bury it  ;D or use it to learn or investigate not to reuse without it being "certified as worthy"
Title: Re: How to check an ESC burnt or alive
Post by: Hellyflyer on January 04, 2010, 10:57:22 PM
Oh yes,

I am not even thinking of putting it back on the bird but I only wanted to know if its repairable and if anyone has tried it can give me some tips of what all things to work with...but i don't think its even worth a try.

Anyways thanks for your replies.

Hellyflyer
Title: Re: How to check an ESC burnt or alive
Post by: me-my-parts on January 04, 2010, 11:22:47 PM
Hi all,

Even i have a esc thats made a hole in it's heat shrink but the only problem is my motor is not working instead it jerks around always when the throttle stick is moved upwards.

Can anyone help me? :help:
Title: Re: How to check an ESC burnt or alive
Post by: sahilkit on January 05, 2010, 07:03:57 PM
first check the motor for any physical damage !
Title: Re: How to check an ESC burnt or alive
Post by: Hellyflyer on January 05, 2010, 11:04:31 PM
Hi ,

Check the motor for any damage and then check it with a different ESC if it works don't even try to use the old ESC as its not worth a try.

Hellyflyer
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