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# How can I generate electricity from a spinning wheel? Answered

How can I turn the spinning of a small wheel/gear into electricity and then subsequently charge a battery with it??

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I have done just that on a large scale , I have created a wheel generator that only captures kinetic energy when vehicle system has a velocity over 30mph or 50kph. 1/2mv2 = for 10,000lb suv at 30mph = 44ft/sec or 13.3 m/sec for the us system

this means 5,000 pounds x 44ft/sec x 44ft/sec = 5,280,000 poundals ft seconds and multiply that by 0.0421 to convert to watts is 497 kw

but at highway speeds of 60 mph this number for the 10000lb SUV 38,720,000 poundal ft x 0.0421 = 1,6 MW of stored kinetic energy.

So at highway speeds and multiple 12vdc alternator with built in IVR's internal voltage regulators. I have been able to capture 28Kw the extra rolling drag is 28,000 / 1,600,000 watts 1.7% extra drag so if it took 20Kw vdc to power electric vehicle. it would not be linear drag it would be 28,000watts - (20,000wtsx 1.7%) = net gain of 27, 660 watts in kinetic energy harvest . now at lower velocities it is less efficient at the 30 mph speed the percentage of extra drag 28,000 watts/ 497,000 watts = 5.6% drag from wheel generator 20,000 - (20,000 x 5.6%) = 1,120 wawatts needed

we have powered mobile trailer refrigeration doing this. see http://4dde.com

A dc motor can be used as a generator. You may need to regulate the output voltage to prevent overvolting the battery. This could be done with a regulator, or by controlling wheel speed

Someone recently told me a boy aged 13 is creating a something that is applied to a car to create electrical output to a car battery and other devices in your car.

Why ?

Cars already come with an alternator that does all of that

I would also like to know how to make a simple one... I figured i would get it to go by using magnets... And the spinning would generate electricity to power a minor electric using conveinece

i think he is asking for a step by step process on how to get it to create electricity... Im curious about it too and do not know about this subject

it depends on how large the battery is. but you point out in your question that the wheel/gear is "small," so, don't expect your battery to be charged very quickly unless that small wheel/gear is spinning like a mutha-effer...

Use a dymano. You can find good old ones at antiue shops.

hey its easy, hust you need is a long copper wire, simple wires, blub that glows, high powered magnets......and a piece of metal too

bing the copper wire on a piece of cuboidal or cylendrical metal piece, bind two ends if wire to a blub, take high powered magnet and move magnet around the solenoid (piece of metal binded with copper), you will see that blub is glowing,,,,,,,,,,,,,

You could get one of those hand crank chargers and hack it into something...

A dc motor can be used as a generator. You may need to regulate the output voltage to prevent overvolting the battery. This could be done with a regulator, or by controlling wheel speed.

Older cars had generators which can work. New cars have alternators which must be rectified from AC to DC. They also require voltage to the field coils before they will produce power.

i would like to now that if wheel diameter is 3.5 ft. and its rpm is 280. how much maximum electricity can be produced

That depends on how much power is put into it.

Consider the following analogy: you are bicycling along a flat road. Easy ride. The wheel is 28 inches diameter. The wheel turns at a constant speed. Now you start up a steep hill. The wheel is still 28 inches. You wish to maintain the same speed. Therefore you must work harder.

The power you draw from a generator is similar. If it is a small generator, with 1 tiny lightbulb as the load, it wont take much power in to keep your 3.5 ft wheel going 280RPM. But if you have a big generator, and want to light every bulb in the house, as well as the refrigerator, then you have to put a lot of work into keeping that 3.5ft wheel going 280rpm.

understanding your point i have a project in college. my project is to find out that if a train is running at a constant speed of 60kmph for 400 kms. its wheel diameter is 3.7 ft. and i want to generate electicity by a magnetic shaft to this wheel than how much electricity can i produce

a rewinding magnet on shaft of 19.5 inch diameter rotating at 239 rpm can produce how much watt electricity

if my train is running at 45 kmph for 400 kms constantly and we think to fix a magnetic box on both side of shaft of wheels and thus the traction will be send to generator which will produce electricity which will be store in a battery. what i want to know is how much watts of electricity can be generated.

understanding your point i have a project in college. my project is to find out that if a train is running at a constant speed of 60kmph for 400 kms. its wheel diameter is 3.7 ft. and i want to generate electicity by a magnetic shaft to this wheel than how much electricity can i produce

If that is a college project, you aren't telling us something. Any energy taken from the train wheels will slow down the train. The speed of the train doesn't matter at all. Any dynamo can be geared up or down. What matters is the mass of the train and how much you are willing to slow down the train to make electricty and how much extra horsepower the train engines have to spare if you wish to maintain the speed.

i have same thing. if my train is running at 45 kmph for 400 kms constantly and we think to fix a magnetic box on both side of shaft of wheels and thus the traction will be send to generator which will produce electricity which will be store in a battery. what i want to know is how much watts of electricity can be generated.

Maybe I am already too old but in my days we had so called Dynamos on our push bikes, flip it on the wheel and your light went on while you ride....

Hmm, you could hook the spiinning wheel onto an axle which turns a generator to create electricity. Thats kinda how the National Grid in the UK works.

This instructable does a very good job of showing you how to build your own generator. In this case they used it as a wind generator, but you can use any means of spinning it to generate power. The number of coils you use and how you connect them together will determine the amount of power it will generate and what kind.

There are allot of things to consider when designing a generator.
• What will turn the generator
• what will the average RPMs be
• how much power does it need to create
• do the power requirements force the generator's size to be to big for the means of turning the generator to work
Its much easier to pull a working alternator out of a car and use it to generate power and charge a battery. Pretty much any induction motor you can find will do the trick if you can spin it fast enough for it to output the power you need. If that motor is able to generate the power you need.

Stick magnets to the wheel so that they pass over one or more coils of wire.