原帖由 5688 於 2009-3-21 07:49 發表
I am really a novice , I just think the greater no. of kv ,the greater power it have, well
Would you tell me more about the no. of s of the battery? is it for lipo only? the greaterr of no. of s ...
Most people would aim the 'total revolution' of the motor to be around 35,000rpm for offroad. so, if you use 4s lipo (4x3.7v=14.8v), then max of kv would be: 35,000 / 14.8 ~ 2350kv. And 5s=18.5v->1900kv, 6s=22.2v->1570kv.
if the power drawn from the motor is the same, then its better to use more voltage to drive the motor, because you will need less current, since Power = Voltage x Current (P=VI)
(eg: if motor needs 1000W of power,
a) For 4S, the current flow is: 1000W/14.8V=67A
b) For 6S, the current flow is: 1000W/22.2V=45A)
so in b) above, the system requires less current to drive the motor than a)
because of less current, there is less heat, meaning better efficiency and better life for your electronics!
ie: less strain on your system.
Please correct me if I am wrong.
[ 本帖最後由 hardmankam 於 2009-3-21 11:37 編輯 ] |