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Can we couple a motor and generator? Answered

Can we couple a motor and generator(or dynamo, small scale) so that we can get the battery charged again?
If any means possible can we amplify the power generated from the dynamo?

Discussions

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seandogue

2 years ago

No. what you are circumspectly suggesting isn't possible in our universe. Perpetual motion is an epic fail, although in your defense, many of us science and engineering types got our start by thinking like that, (outside the box) so while it won't work, I do applaud you for thinking about it.

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Vyger

2 years ago

What I like better is coupling a copy machine to a shredder. As the copy machine cranks out copies the copies are directly inserted into the shredding machine and reduced to little bits.

This is a specially designed machine for a business office that has government contracts. They get paid for making each copy and distributing them. But since they are not given an up to date mailing list they address them and then shred them so as to avoid the problem with the post office returning them as undeliverable. In addition to the initial bill for the printing, they get to submit a second bill for recycling the waste. They also can apply for a contract bonus due to the large savings in postage they have, thus proving that they are extremely efficient which also moves them higher up on the list of prefered contractors.

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rickharris

2 years ago

What battery?

In principle yes BUT it may take a bigger motor than you think.

If possible remove battery and charge conventionally from the mains supply.

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rickharrissteveastrouk

Answer 2 years ago

your right I miss read the question, or rather read more into it than said. What happened to teaching physics in schools?

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Robert Pain

2 years ago

It is done all the time.

One way is dynamic breaking in electric trains, the momentum of the train is slowed by the load of the generator, the momentum is converted to electricity stored in a battery.

Now if you are talking about connecting a electric motor to a generator there is not much use.

Generators only convert 50 to 80 % of the mechanical energy to electrical energy, so if you put in 5000 watts you only get 2500 to 4000 watts back.

I have only seen one practical use for this, using a 60 cycle motor to power a 50 cycle generator instead of using an inverter or a pwm circuit.

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bravoechonovember1Robert Pain

Answer 2 years ago

+1

also, diesel-electric trains have a diesel generator powering electric motors because electric motors can provide full torque a 0 rpm

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steveastrouk

2 years ago

No, you are trying to get something for nothing....