Amp Draw

[Arct1k]

http://www.rc-monster.com/forum/show...554#post190554

[mriccucci]

Thanks i knew this was somewhere.

[BrianG]

lol, we need a sticky that maps out where the stickies are!

[Arct1k]

Seriously how about a section with only stickies...

Some of the sub forums are getting to have too many stickies...

[BrianG]

I'll leave that up to Serum/Mike to decide.

[mriccucci]

lol i agree with the above!

[mriccucci]

Ok so im a little confused, im looking a the true rc 8000mah packs, will i need to charge a 4s2p pack with an 8s balance charger?

[Sammus]

The way I imagine it is: hot esc usually means there is too much current flowing through it. usually that means the motor is drawing too much current.

The motor will draw more current the higher it is geared, the heavier the vehicle, if there is any binding in the drive train it doesnt help either. and also if the motor is hotter it has more resistance and thus has to draw more current to output the same power.

Basically, check your drivetrain is moving freely, if so then gear down.

If there is some fundamentally flawed logic in there someone please correct me :)

[GriffinRU]

Originally Posted by mriccucci

Ok so im assuming that theres no way to figure out theoretical amp draw? Or is the amp rating of the motor the most that they will draw constant? I thought i saw somewhere that a 7xl will only draw 80a is this correct. I assume that the burst could hit almost 120 if not more.

Why not, there are programs like Motocalc which can provide you with data you are looking for. Question is do you know what to do with the data?

BrianG is correct, but there is no sense to talk about current draw when sensoreless motor shaft is stalled, ESC would limit current. It is much more important to track current while shaft is in motion, than you can observe all kind of interesting factors determine your motor performance.

If you just looking for maximum current draw for given motor, you are looking for the wrong parameter, because any motor can draw high current (depends for how long and which component would go south first, ESC, motor, battery, wires) in wrong configuration.

What you need is drive-train geared for motor which would be running most time in high efficiency range. That takes practice or understanding of motors.

[mriccucci]

Any info on the battery charger?