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Originally Posted by glassdoctor
Actually this is not true at all... their numbers are correct.
Amp draw increases with voltage. Given the same motor, etc... more voltage always means more current.
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Sorry, no it doesn't. As voltage goes up
less amperage is needed to do the same amount of work. That is because of this relationship here:
Amps = Watts / Volts
Say for instance, we have a 1000w motor on a 6 cell pack:
139A = 1000w / 7.2v
Now, let's upgrade that to a 10 cell pack:
83A = 1000w / 12v
See? The amps went
down, not up. If the amps stay the same when the voltage went up, that would mean the motor somehow make more power...which can't happen, because the motor is unchanged.
What this vendor is asserting with their numbers is that the same motor can do more work with more voltage. That makes no sense.
Sleebus