| 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 ]
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