Model Boat Mayhem

Technical, Techniques, Hints, and Tips => The "Black Arts!" ( Electrics & Electronics ) => Topic started by: Martin [Admin] on November 09, 2014, 09:24:49 PM

Title: wires melt and ESC burn out...?
Post by: Martin [Admin] on November 09, 2014, 09:24:49 PM

Via email to Mayhem...


hi there , I have read some of your articles. I am having problems I have 12v-4ah 20 AEN , plus two 9v brushed motors , and I am continously burning out ESC , wires melt and ESC burn out , could you help or advise please , thank you ,

Title: Re: wires melt and ESC burn out...?
Post by: Stavros on November 09, 2014, 09:30:52 PM
More info would be helpful BUT I see a 9v motor on 12v................what size wires What size ESC what size boat what size Props etc etc etc
 
 
Dave
Title: Re: wires melt and ESC burn out...?
Post by: plastic on November 09, 2014, 09:31:25 PM
A lead-acid has very low internal resistance so it will supply as many amps as the load demands - sound like your motors are pulling too much current - any fuses in your circuits? Are the drive shafts tight? Do the motors smell REALLY hot?
Title: Re: wires melt and ESC burn out...?
Post by: Tug-Kenny on November 09, 2014, 09:32:06 PM

An expensive problem you have there.

Obviously the motor  (motors ?) are taking too many amps or your Esc's are underrated or faulty.

The first test is connect each motor via an ammeter directly to the battery and see what they read.  The most obvious choice next is to fit a fuse in the line because it takes some power to burn out wires.

Hope this helps

ken

Title: Re: wires melt and ESC burn out...?
Post by: plastic on November 09, 2014, 09:34:12 PM
The ESC maybe correctly rated - if there were fuses to protect it from overload of a stalled motor.
Title: Re: wires melt and ESC burn out...?
Post by: john44 on November 09, 2014, 09:34:45 PM
What size are the motors,500,600,700,etc?
What is the speed control rated at?what make and model?
How have you wired them up?
Are both motors running of one esc.?


John