motor current question

[Sean]

in the same car geared for the same sort of speed which motor will draw more current a 7XL or a 8L. thats all nice and simple.

cheers

Originally Posted by Sean

in the same car geared for the same sort of speed which motor will draw more current a 7XL or a 8L. thats all nice and simple.

cheers

the 8L will have to work harder so it will draw more amps

[GriffinRU]

Always the one with higher Kv.

[jhautz]

Originally Posted by GriffinRU

Always the one with higher Kv.

I would think the length of the motor will play into that as well. Not just the kv.

[What's_nitro?]

Would they really be that far off from each other? I mean, at the same speed, the two would be pulling the same amount of power from the battery to move the truck. Right? The weight differs a bit with the motors, but I don't think that is enough to affect current draw so much.

[GriffinRU]

Originally Posted by jhautz

I would think the length of the motor will play into that as well. Not just the kv.

Just Kv,

Kv parameter depends on motor size and turns

[aqwut]

well.. depends what kinds of speeds you're talking about....? the KV and Size of the motor both plays a role... if you're geared for 20MPH, they both would be similar... but if you're geared for 40MPH, then the L will definately draw more amps...

[What's_nitro?]

The smaller motor would get hotter with a larger load, that may be where the discrepancy comes from at high speed.

[GriffinRU]

Power is RPM * Torque
Torque = Current
Kv defines RPM
Motor size defines motor rated power
If you operate motor outside power envelope -> motor would smoke
If you are going to use within power levels then motor with greater Kv would draw more Amps.

7XL-2382 Kv
8L- 3072 Kv

quite a difference