mini question

[lincpimp]

In general a motor will draw less amps as the voltage is increased. However the 6800 motor is spinning real fast on 2s and wizzing round at 3s. Problem with the mamba motors is that the are a 130s motor and lack torque. I eventually replace all of them with 280l or xl motors running 3s and just geared the vehicle to run faster. The motor/esc/battery ran cooler and I got longer runtimes from the same battery size. The lower kv higher voltage systems are more effecient and more fun too. The mini t is very light so it will be ok with that motor. I had a 5400 on 8 numh and then 3s lipo and it screamed, totally uncontrollable, but very fun. I would say a good 15c lipo in the 1100 to 1800 range will work fine in the mini t. The max amps 1100 will fit in the battery tray, it is almost square.

[BrianG]

Originally Posted by lincpimp

In general a motor will draw less amps as the voltage is increased.

I think you have that a little incorrect. A motor will draw more current with more voltage. This assumes that the motor wind, gearing, etc is unchanged.

If you increase the voltage, you have to increase the number of motor turns to reduce current.

However, if you want to run higher voltage on the same motor, you could gear down a little. That will reduce the mechanical load on the motor, which reduces the current. So, the higher current generated by the higher voltage is somewhat offset by the reduced mechanical load.

[lincpimp]

Originally Posted by BrianG

I think you have that a little incorrect. A motor will draw more current with more voltage. This assumes that the motor wind, gearing, etc is unchanged.

If you increase the voltage, you have to increase the number of motor turns to reduce current.

However, if you want to run higher voltage on the same motor, you could gear down a little. That will reduce the mechanical load on the motor, which reduces the current. So, the higher current generated by the higher voltage is somewhat offset by the reduced mechanical load.

Yes, I neglected to mention gearing both setups for the same speed. Also, if you consider the motor output(watts) constant, the the amp draw goes down with increased voltage. Now I am sure in the real world the more voltage you put on a motor the more power it can output, but there must be a limit to the power output though, mechanical or otherwise. So if you could push 10 volts into a motor with enough current draw to approach the max output of the motor and campare it to 20 volt,s the current draw would be roughly half. I do not have the pratical background, just theroretical knowlege from readin' an stuff, so I may be wrong!