Over specifying ESC amp rating

Over specifying ESC amp rating

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5 July 2018 at 11:00 #4510
Terry Plumridge
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@terryplumridge66794
Advert

5 July 2018 at 11:00 #77914
Terry Plumridge
Participant
@terryplumridge66794
Does it hurt to go for a higher than needed rated esc?
5 July 2018 at 11:07 #77915
Dave Milbourn
Participant
@davemilbourn48782
Only in your wallet….

DM
5 July 2018 at 11:13 #77917
Terry Plumridge
Participant
@terryplumridge66794
Thank you Mr. Milbourn.
5 July 2018 at 13:02 #77920
Dave Milbourn
Participant
@davemilbourn48782
I hope you don't think I was being flippant at your expense, Terry. The full answer is that while it's perfectly OK to use an ESC which will carry more current than the motor will draw it's never a good idea to use one which won't.
DM
5 July 2018 at 13:59 #77925
Terry Plumridge
Participant
@terryplumridge66794
No flippancy detected in your reply, it was short, to the point, and not without a touch of humour.

Cheers, Terry.
5 July 2018 at 18:24 #77932
ashley needham
Participant
@ashleyneedham69188
ON the other hand….I have found that high current ESc`s that are operating at currents well below their max sometimes do not have such great low speed control, or it may be just the controller I had?

Ashley
5 July 2018 at 18:53 #77933
Kev.W
Participant
@kev-w
But whatever you do, don't try running a 100amp motor on a Chinese 320amp ESC.
5 July 2018 at 20:39 #77938
Dave Milbourn
Participant
@davemilbourn48782
Ashley
It's the latter, probably one of the type Kip mentions. In my experience if you take the stated current-carrying capacity of one of these products of the PROC and divide it by 20 then you're somewhere near reality.
DM
6 July 2018 at 10:42 #77943
Malcolm Frary
Participant
@malcolmfrary95515
Generally, what will control a large motor will control a little one just as well. A badly designed ESC, whatever its current rating, or claimed current rating, might not start to give an output until you are at 1/4 throttle. The usual back story was that "it makes sure that the motor starts".

For fine control, the better option was a gradual increase in power offered before the motor actually started to turn with very little dead band. In the elder days, this caused the motor to hum or growl, in later ESCs, the motor whistles.
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