|Nov 16, 2010, 03:13 PM|
Portugal, Braga, Vila Nova de Famalic„o
Joined Oct 2009
Calculate ESC amps
Is there any formula to calculate how many amps a esc must have according to motor, battery voltage and draw current?
If this has already been discussed in other thread i am sorry but i couldnt find it..
JOse - Portugal
|Nov 16, 2010, 04:03 PM|
The formula if I understand you correctly is simple.
Get a esc thats rated HIGHER then the motor. Get a battery that can handle the amp demand and then some.
EXEMPLE: Without knowing the amp draw frmo the motor and prop combination you can get a esc rated for higher then the max amps of the motor. If you motor is rated for 50A MAX then get a esc rated for higher. Simple really.
It wont hurt if you get a too big of esc, all it will do is take more place in the plane and weight a little more. If thats not a big concern then no worries.
I got 55A max motor but use a 100A constant ESC that will peak at 150 or higher I think, I bit overkill but hey I mite want to use it in something bigger later and wont have to buy another esc just because I bought one that barely could provide my current setup..
Now if I over prop and draw too many amps then I will smoke the motor.
|Nov 17, 2010, 03:52 AM|
Joined Nov 2003
If you already know the "draw current" that's pretty much all you need to know. The ESC rating should be at least that much and preferably a bit higher.
You also need to check that the ESC will take the voltage that you are using. Many ESCs are only rated up to 3,4 or 6 cells and using a higher voltage will damage them.
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