1. If you would like to get rid of these banners and the ads within the posts, all you have to do is sign up and they will go away!
  2. Welcome to Rc-Help, are you here looking for the PDF Plans? They are located in the store in the tab above, but you must be signed in to access that part of the site. It only takes a second to sign up!
  3. Like Us On Facebook!
    Hello Guest, it occurred to us during that last server failure that we had no way of informing the members of the site of the failure and I would like to invite you to like us on facebook so that you can get updates if the site happens to go down again. We don't post much over there unless we are updating the members so we will not flood your feed like some places do. Just click on Like and then allow notifications and that's it. See you there soon!

    Click Here To Rc-Help's Facebook page!
    Dismiss Notice
Dismiss Notice
Hey Guest, I see you are not signed up on our forum yet. Did you know Registration is FREE and is only a couple clicks away? You can even sign in from Facebook, Twitter or Google+ for your convenience! So what are you waiting for, CLICK HERE to join in on the conversation!

Motors Understanding Motor Data

Discussion in 'Electronics' started by bigone5500, Feb 10, 2018.

< Lipo Ressurection | 20 Or 30 Amps? >
  1. bigone5500

    bigone5500 Well-Known Member

    Blog Posts:
    0
    Joined:
    Mar 22, 2017
    Messages:
    2,078
    Likes Received:
    66
    Trophy Points:
    58
    Location:
    Louisiana
    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?
     


  2. Tony

    Tony Administrator Staff Member

    Blog Posts:
    14
    Joined:
    Feb 21, 2011
    Messages:
    35,811
    Likes Received:
    1,403
    Trophy Points:
    113
     
  3. Smoggie

    Smoggie Well-Known Member

    Blog Posts:
    0
    Joined:
    Dec 14, 2015
    Messages:
    2,319
    Likes Received:
    122
    Trophy Points:
    73
    Location:
    Aberdeen, UK
    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.
     
  4. Smoggie

    Smoggie Well-Known Member

    Blog Posts:
    0
    Joined:
    Dec 14, 2015
    Messages:
    2,319
    Likes Received:
    122
    Trophy Points:
    73
    Location:
    Aberdeen, UK
    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
     
  5. bigone5500

    bigone5500 Well-Known Member

    Blog Posts:
    0
    Joined:
    Mar 22, 2017
    Messages:
    2,078
    Likes Received:
    66
    Trophy Points:
    58
    Location:
    Louisiana
    So probably safest to go with a 30a esc right?
     
  6. Smoggie

    Smoggie Well-Known Member

    Blog Posts:
    0
    Joined:
    Dec 14, 2015
    Messages:
    2,319
    Likes Received:
    122
    Trophy Points:
    73
    Location:
    Aberdeen, UK
    yes, 30A
     
  7. rdsok

    rdsok Well-Known Member

    Blog Posts:
    0
    Joined:
    Sep 11, 2011
    Messages:
    1,542
    Likes Received:
    59
    Trophy Points:
    48
    Location:
    Norman, Ok USA
    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
     
  8. Smoggie

    Smoggie Well-Known Member

    Blog Posts:
    0
    Joined:
    Dec 14, 2015
    Messages:
    2,319
    Likes Received:
    122
    Trophy Points:
    73
    Location:
    Aberdeen, UK
    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.
     
< Lipo Ressurection | 20 Or 30 Amps? >

Share This Page