Electric Motors

Posted on | April 29, 2009 | Comments Off

Electric Motors

why can't they make a generator that runs off two wheels to run two electric motors on another two wheels?

i mean they can make guns out of plastic, why can't they make light weight generators and motors to cut down on weight and maybe make this possible?

Because you're always going to lose some energy in the system. Heat due to friction in between the moving parts is lost energy. We can't make it 100% efficient. So you CAN do that, but it will still need an outside energy source.

It's like this: your wheels turn the generator and make 100 joules of energy. Then you WANT the generator to put the 100 joules into the other two wheels to keep you moving and complete the cycle. But there's some energy loss in the system. Say you make it really good and only lose a joule due to heat in the system, and you're able to put a full 99 of those 100 joules back into the other wheels to drive the car. You still need an outside energy input of another joule just to break even, and even more if you want to accelerate.
You can make a car (or whatever machine) a lot more efficient by doing stuff like this and that's a really good thing, but you can't ever make it 100% efficient so that it doesn't need ANY outside energy source at all. It's not something that we can't do because of our technology, it something that's physically impossible. It's like trying to lift yourself up in the air by pickup up on your own foot.

How to build a simple electric motor, plus how it works.

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Does anyone know a shop website that specializes in electric motors?

Just plain ol' basic electric motors for residental purposes.

Well as far as electric motors, I know a lot about them. However since you want a place that sells/specializes in electric motors, go to www.electricmotorsale.com. I did a google search and found that website. They had like every electric motor of every size. AC, DC, large, small.

I know for every job you need the right size and type of motor. As far as I know, this place has all types.

Another suggestion would be ebay if you want a cheap electric motor (used of course). Anyway I hope that helps.

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