Old 08-16-2019, 12:28 AM
homo ludens modelisticus
ron_van_sommeren's Avatar
Join Date: Jul 2005
Location: near Nijmegen, Nederland
Posts: 1,202

Originally Posted by ron_van_sommeren View Post
... Note that Kv says absolutely nothing about max.power or max. current a motor can handle ...
On the other hand, Kv has a huge effect on current a motor (tries to) draws, current is proportional to Kv cubed (and proportional to voltage squared).

E.g. doubling Kv would 2=8fold current, that is, if battery, controller and motor can handle it without going up in smoke. And ignoring the extra voltage losses.
A more real life example: going from Kv =1000rpm/volt to 1250rpm/volt (or any increase by factor 1.25) would give an increase in current drawn by factor (1.25)=2!

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