ORIGINAL: Michaelh
Yeah anytime you up the voltage you cut the amps.
This is why your 1500watt heater at the house only draws around 12-13 amps.
Try that with 12v .Would be around 125 amps.
Try it. The DC current will double. A DC motor is basically a fixed resistor. Run any DC motor on a variable DC supply with a volt and a amp meter and you'll see what I'm talking about. They do not act like AC motors which is what you are describing.
John