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Old December 8th, 2005, 12:10   #17
Avenging Angel
 
Join Date: Feb 2004
Location: Calgary, AB
Quote:
Originally Posted by Kos-Mos
In fact, the battri voltage should not make a difference that much.... the capacity of the pack if by far more important when talking about torque....

if the motor needs, let say 3 amps to turn when stall, and you pack is only a 600mA, then it will have a hard time giving enought power to the motor....
what an other proof???

the formula for power is Volts*Amps.... so if you drop the voltage, but rise the amp, then there is no power lost...

simple as 3*2=6 and 3*2=6....

voltage only change speed of the motor, but if you have higher voltage, and the motor is working bad, you will so need less amp to have it turn....
To an extent you are correct. The theory is kind of right but the application is wrong. Formulas are nice for a starting point but you also need to take into account how many wraps there are around the coil and what gauge of coil is being used. The guages of wire and wraps of coil directly affect the output of any given electric motor. Pending on the designed torque output, the engineer will pick a desired voltage to meet the requirements in conjunction with capacity and then design the motor around those specifications. Based on the prior specs, the engineer will determine coil wraps, gauges and resistance. If a lower voltage battery is used on a motor that is designed for something that requires a higher voltage less torque will be produced. The only way to compensate for it is to increase your amperage rating. While you gave the equation for power, I don't see what you're trying to get at, due to the fact that Torque and Power are two completely different things.

lotmr - With that mAh rating, it should be enough to cycle your gun. What kind of motor is in those Famas?
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