DriftingDragon

i just got an old dremal drill working and i want to use it as a motor is there any way to make ac current with dc batteries

(its most likely gunna be for a big car)

twomanytoys

No. Its impossible to get ac current with dc batteries.

Access

No it isn't it is called an inverter
http://www.amazon.com/s/ref=nb_ss_gw...verter&x=0&y=0

DriftingDragon

thanks for the help what ever i build is now gunna be smoking fast

redraze

the dremel has almost no torque only rpm.

dsales

If he gears it properly, he could get some decent low end torque

twomanytoys

I understand about the inverters but using regular dc batteries for any type of rc application wont run an inverter. The inverter is for a constant 12v dc current. If you drop below 11v the inverter will not work. You also need a certain amperage to drive the inverter. Inverters take alot of power just to convert Dc to Ac. Thats why they are mainly used in full size cars or generators because most cars can handle a constant 80-120amp draw.

A dremel motor will have NO torque what so ever to move a car. They are made for high rpm not torque. You can hold a dremel bit with your fingers and turn it on and it will not move.

hands without shadows

Most powertools will work if you hook up a bunch of car batteries in series: http://www.instructables.com/id/Run-...ithout-an-Inv/

mechanicalguy

This is quite a funny scenario, overall, but in my opinion you are wasting your time using an AC motor for an RCV. DC motors have way more torque than AC motors. Every time AC power "cycles" it drops to zero and then below (sine wave). Therefore, there is zero torque in an AC motor at the zero crossings.

Fecal Freddy

I think it'd be funny to have him remove the body of his car to find that it's powered by a dremel.

adam-69

just get a battery dremel and put it length ways in the car lol.

Argess

The power from an electric motor comes from its design, not wether it is AC or DC. The Dremel was designed as a high-speed device. To also have high torque, would be a trade-off with respect to its size and weight (i.e. it would be heavy). If it was to be geared down, it would take a reduction drivetrain which would exhibit significant losses. It's best to use a motor designed for something a lot more close to your intended use.

On the opposite end, look at an electric drill. A low speed motor, but with lots of torque. Now you're cookin', but invertors are often very inefficent, sometimes around 50%. No-one wants to lose 1/2 their run time to an invertor.

Best to use the Dremel for its intended purpose, and find some other electric motor closer to what you want. There are lots of nice little 12VDC motors in cars.....windshield washer pumps, elctric door locks (Ford F150s use a motor, not a solenoid), electric seat motors, etc. These could all be "free" if you find a nice wreck. But hobby shop motors arn't terribly expensive depending on what you want. Maybe the LHS guy will give you a deal on old stock that isn't popular anymore....

Access

He asked if it was possible (ie. "is there any way" [to do this]). You guys are telling him way more than he wanted to know.