Voltage and current question

[BL-Power]

Originally Posted by MetalMan

There's one simple law that explains it all: Ohm's Law, which states that V=IR (voltage = current x resistance). If you don't change the gearing, then R (resistance) remains the same. So by Ohm's Law, current will increase proportionally with voltage. This doesn't always hold true, however, because you could change your driving style.

Changing the gearing has no effect on the electrical resistance.



If you go up from 4s to 6s, your motor will draw less current if the total motor rpm is the same, for example a 3000kv motor on 4s (= 44400rpm) is drawing more amps than a 2000kv motor on 6s (also 44400rpm).

[MetalMan]

Originally Posted by BL-Power

Changing the gearing has no effect on the electrical resistance.



If you go up from 4s to 6s, your motor will draw less current if the total motor rpm is the same, for example a 3000kv motor on 4s (= 44400rpm) is drawing more amps than a 2000kv motor on 6s (also 44400rpm).

Right, changing the gearing affects the mechanical resistance. But since a motor converts electrical energy into mechanical energy that mechanical resistance is a factor here.

We're talking about increasing the voltage on the same motor, and its effects.