ESC to motor amp draw question

[DucktileMedia]

I'm not sure if it works this way but if I use a 40amp esc and my motors have a max draw of 42 amps, will the motor only see what the ESC is capable of providing or will it fry the ESC trying to overload it? If the hover draw is half of the capacity of the ESC I would think i am fine but I worry that that one time I need to apply power I might exceed the limit and fry something. I would think the motor can only draw what the battery/esc is capable of delivering, no?

 

[jrlederer]

This is not the case. Possibly someone can link to a page with a more descriptive explanation, but the motors can draw more than is available, causing over-current fault in ESC and subsequent failure. Otherwise, there would be no issue with using oversized motors like the Plettenbergs in conjunction with the Aerodrive 8 boards, or any other controller for that matter.

 

[kloner]

like he said, uh,uh. the prop you put on it makes what the actual draw is. if you see prop data with the motor showing that, then yea, your a little under gunned but not bad.

What you fly like has alot to do with if it'd live like that or not. I've been through alot of brushless motors through scorpion on planks. Everytime i ask lucien to tell me what prop to run he has the exact numbers of my options, and he always recomends the lower draw setups. leaves a little overhead like actual amp draw 32 on a 40 amp esc. That can be done through proping and voltage

When they say the motor has a max of 42 amps usually means they calculated it's max voltage with how many watts it is rated at and that amperage shouldn't exceed 42 amps with the recomended voltage or most likely the watts will exceed the limit and start smokin parts.