Motors Understanding Motor Data

[bigone5500]

I have DLFPV 2205 2300kv motors to put on a quad. They will spinning 5045 3-bladed props. I will be using 4S 1550mAh batteries. This is the motor data for them:

KV: 2300
Configuration: 12N4P
Weight: 28g
Ille Current(10)@10V: 0.45A
No. of Cells(Lipo): 2-4S (11.1-14.8V)
Max Continuous Power(180S): 270W
Internal Resistance: 65mΩ
Max Current(180S): 24A
Max.Efficiency Current: (4-8A)>80％
Recommand propeller: 5045 propeller

Will a 20A esc be sufficient or do I need to go with 30A?

 

[Tony]

Max Current(180S): 24A

 

[Smoggie]

Those stats might need taking with a large pinch of salt. 270W is a LOT for a 28g motor. The rule of thumb for motors is that they can deliver up to 80-100W per ounce (28g).. do this one is claiming three times the norm... I dont believe it....

The fact that they dont list a range of props also tells me the figures arent to be trusted. A motor wont be able to spin as large a prop on 4S as it does on 2S, yet they list only one prop.

 

[Smoggie]

PS... I've done some reading up and maybe these modern racing drone motors tear up the old rule book.. Seems like they can deliver the sort of power being claimed here, which is very impressive

 

[bigone5500]

So probably safest to go with a 30a esc right?

 

[Smoggie]

yes, 30A

 

[RandyDSok]

The rule of thumb for motors is that they can deliver up to 80-100W per ounce (28g)..

Since the weight of the casing and prop shaft etc has little to do with the electrical efficiency, gauge of wiring being used and other factors like bearings etc... I'd never go by that

 

[Smoggie]

Yeah it's only a rule of thumb but it used to be reasonably reliable for most motors, if a bit conservative. The ultimate power of a motor is limited by magnetic saturation which in turn is related to the weight of the iron core and magnets, so weight is a factor for sure.